#linuxcnc | Logs for 2019-04-26

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[00:00:29] <pink_vampire> hi
[00:00:54] <selroc> hi pink
[00:00:56] <skunkworks> Plus rt_preempt is going to be part of the kernel at some point in the future
[00:01:18] <pink_vampire> how do i split a bushing?
[00:01:43] <skunkworks> And from what I have read, watched.. To make rt_preempt part of the kernel is making the kernel better.
[00:01:57] <pink_vampire> any idea ow to hold it?
[00:02:15] <skunkworks> slitting saw?
[00:02:24] <skunkworks> in a vice edge wise?
[00:02:41] <CaptHindsight> not sure how many use RTAI anyway
[00:02:45] <pink_vampire> yeah, but it is vary thin
[00:02:50] <selroc> later
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[00:03:19] <CaptHindsight> even fewer that actually need it
[00:03:31] <pink_vampire> i 'm thinking about making an insert and super glue it, and then split it
[00:03:46] <skunkworks> I am not using rtai anymore.. I just switched the K&T over to rt_preempt. It was painless. (suprisingly)
[00:04:18] <CaptHindsight> mostly for cheepies that want stepping over LPT
[00:04:37] <CaptHindsight> so it's lots of work so others can save money
[00:04:43] <skunkworks> well... Some hardware 'seems' to be just as good as rt_preemt.. I hope to test it this weekend...
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[00:04:57] <skunkworks> http://www.electronicsam.com
[00:05:13] <CaptHindsight> RTAI when properly built is always faster
[00:05:13] <skunkworks> it has now been running for 3 hours...
[00:05:50] <CaptHindsight> the RTAI with a generic kernel config is like snow tires on a Ferrari
[00:05:51] <skunkworks> oh - I am sure.. But in my playing - <10us is pretty darn good...
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[00:06:17] <skunkworks> that should give you easy 40khz...
[00:06:36] <skunkworks> if you need more than that - go hardware
[00:06:41] <CaptHindsight> so it was always kind of goofy with LCNC livecd
[00:06:56] <CaptHindsight> we built it specifically for our hardware
[00:06:57] <skunkworks> CaptHindsight: what have you seen?
[00:07:04] <skunkworks> latency wise?
[00:07:26] <skunkworks> I think the best I have seen with rtai on all the systems I have tested is like 5us
[00:07:39] <skunkworks> latency
[00:08:06] <skunkworks> and that might have been just a wet dream
[00:09:18] <CaptHindsight> I'm off
[00:09:59] <skunkworks> Night!
[00:10:11] <CaptHindsight> oh what happened to Jepler?
[00:10:21] <skunkworks> ? why
[00:10:27] <CaptHindsight> did he move away or take time off from LCNC or?
[00:10:48] <CaptHindsight> haven't noticed him in the dev channel
[00:10:55] <skunkworks> Oh - I think he has been slowly moving away from linuxcnc
[00:10:59] <skunkworks> other interests.
[00:11:02] <CaptHindsight> then again i haven't been around much either
[00:11:06] <CaptHindsight> me to
[00:11:06] <skunkworks> heh
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[00:44:49] <Deejay> moin
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[01:29:43] <pink_vampire> how are those bearings?
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[01:30:16] <pink_vampire> https://www.ebay.com
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[03:44:53] <Loetmichel> Jymmm: because no coil dattached
[03:44:55] <Loetmichel> -d
[03:45:05] <Loetmichel> its the maximum it can measure
[03:56:57] <Loetmichel> mornin'
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[04:16:02] <Loetmichel> btw: got that sheet alu finished yesterday... only 2 hours overtime... looks like that will even work... (Dual all in one thin client with 24" monitor in front) MAAAN that will be a fat box (and i hope those cooling hexagons are sufficient for 2 times 30W)... -> http://www.cyrom.org
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[05:14:37] <XXCoder> pink_vampire: dunno but cheap enough to buy and test i guess?
[05:29:48] <pink_vampire> XXCoder: ??
[05:29:57] <XXCoder> the bearing you asked about
[05:30:49] <pink_vampire> oh i see
[05:30:51] <pink_vampire> yeah
[05:31:04] <XXCoder> 4 cm in size?
[05:31:09] <XXCoder> pretty large lol
[05:31:20] <XXCoder> I have 2 bearings from work, they was 50 bucks and 200 bucks lol
[05:31:22] <pink_vampire> also find this one https://www.fastenal.com
[05:31:31] <XXCoder> those bearings were part of spindle, and shot.
[05:31:51] <pink_vampire> this is just for the gear in the milling head
[05:32:12] <XXCoder> can also make pretty big fidget spinner lol
[05:32:26] <XXCoder> i may make novelity giant spinner with my big bearing
[05:32:38] <XXCoder> it may not work for spindle, but it spins well enough
[05:33:00] <pink_vampire> now the bearing make very grinding noise
[05:33:08] <pink_vampire> and i move it by hand
[05:33:40] <XXCoder> sounds like shot i guess
[05:34:42] <pink_vampire> yeah
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[05:46:35] <pink_vampire> i need to find a capacitor for the milling head
[05:46:43] <pink_vampire> no idea what is the value
[05:47:22] <XXCoder> have a old obe?
[05:48:05] <pink_vampire> http://vi.vipr.ebaydesc.com
[05:49:09] <jthornton> morning
[05:49:15] <XXCoder> hey
[05:49:26] <pink_vampire> hi jthornton
[05:49:48] <XXCoder> 20 uF +- 10%, 330v
[05:52:48] <pink_vampire> huge capacitor
[05:53:05] <XXCoder> https://www.repairclinic.com maybe
[05:53:45] <XXCoder> no
[05:55:39] <XXCoder> found it. https://www.ebay.co.uk
[05:55:47] <XXCoder> they sell various uF range at 450ac
[05:55:55] <XXCoder> *v
[05:56:18] <XXCoder> though I cant recall if higher volts is acceptable as long as uF is same or not.
[05:56:33] <pink_vampire> no idea
[06:03:32] <XXCoder> apparently yes though not too far
[06:03:38] <XXCoder> 330v to 450v probably too far
[06:04:17] <XXCoder> https://www.ebay.co.uk
[06:04:25] <pink_vampire> so the 450V will be ok?
[06:04:30] <XXCoder> problem is i dont know what it means by "20%:
[06:04:45] <XXCoder> ah! Capacitance Tolerance : 20%
[06:04:53] <XXCoder> i guess error range of 20%
[06:05:31] <XXCoder> i dont know if type of cap it is matters. it says electrolytic
[06:05:54] <pink_vampire> https://en.wikipedia.org
[06:07:23] <XXCoder> so what its made from matters. it says electrolytic cant do constant cycle
[06:07:27] <XXCoder> spindle its probably that
[06:09:17] <Loetmichel> XXCoder: electrolyte CAn do constant cycle
[06:09:29] <XXCoder> really? wiki seems to say no
[06:09:30] <Loetmichel> just stay within the power ratings
[06:09:40] <Loetmichel> it doesent like to get cooked
[06:10:00] <Loetmichel> or did you mean electrolytics cant do AC?
[06:10:19] <XXCoder> no just constantly being used
[06:10:37] <XXCoder> maybe you can find the same part pink linked a picture to
[06:11:01] <pink_vampire> it is from 1972
[06:11:12] <Loetmichel> you can use electrolytics constantly. they just tent to start boiling so you should derate the power you send thru it so it stays cool
[06:11:41] <Loetmichel> an electrolytic at 80°C will live weeks, the same cap at 45°C will live half a century
[06:12:15] <XXCoder> beefy heat sinks ;)
[06:12:20] <Loetmichel> its actually so that old electrolytes that sat for decades without use tend to be damaged
[06:12:29] <pink_vampire> Loetmichel: this is the "original" http://www.maxton.com
[06:12:48] <pink_vampire> but I didn't got it with the machine
[06:12:49] <Loetmichel> you need to intriduce them to voltage quite slowly, the internal oxide layer that insulate them disappears without use
[06:13:21] <Loetmichel> pink_vampire: classic motor starter cap
[06:13:47] <pink_vampire> but it is rated for 330V
[06:14:33] <pink_vampire> do you think can use a capacitor with higher voltage rating? like 450V or 500V?
[06:15:16] <XXCoder> pink my later link is 330v 40uf same as yours, but 20% varancy rather than 10% of yours
[06:15:32] <XXCoder> which means you may have to buy a few and find one thats close to your orginial
[06:18:01] <Tom_L> morning
[06:18:11] <XXCoder> hey
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[06:41:54] <Loetmichel> pink_vampire: please use a similar designated motor starter cap
[06:42:19] <Loetmichel> the design of those is quite different from a standard cap
[06:42:25] <Loetmichel> "self healing" and stuff
[06:49:02] <XXCoder> self healing ehj
[07:00:14] <sync> sure, the metal foil explodes away around the isolation fault
[07:00:27] <sync> so you loose a tiny bit of capacitance but you keep running
[07:00:33] <XXCoder> capactor heal thyself
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[07:49:25] <Loetmichel> *hrrrrmph* just "repaired" an aluminium-swarf damaged VFD... or so i thought... replaced the blown FET, reassembled it, plugged spindle and mains in: booting... looks normal... pressed start button... *ffffFIIIIIp* half a turn and off again with "dl" in display. something more damaged. THAT will take a while now. Or i'll have to buy a new HY01D523B VFD. Luckily i can still read the parameters...
[07:49:25] <Loetmichel> never written them down the first time.
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[10:54:50] <Loetmichel> *gnhihi* "bad codec" https://www.isnichwahr.de
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[11:20:43] <Rab> Loetmichel, how was the VFD damaged by swarf?
[11:24:06] <roycroft> i don't know about loetmichel's situation, but many of the inexpensive chinese vfds have cooling fans that suck air over the electronics without a filter
[11:24:23] <roycroft> a little bit of swarf flying in the wrong direction could easily get sucked in and short something out
[11:24:38] <Rab> I figured something like that.
[11:24:48] <roycroft> i use those kinds of vfds, but i put filters on the air inlet
[11:25:01] <roycroft> cheap insurance
[11:25:03] <Rab> Or bridging the terminals, maybe.
[11:25:16] <roycroft> yes
[11:26:03] <roycroft> i filter the air flowing through the vfd on my router table, not because i'm concerned about shorts, but because the sawdust could coat the output transistors and cause them to overheat
[11:26:49] <Rab> Or absorb moisture if your shop's not well climate-controlled.
[11:27:17] <roycroft> that too
[11:27:57] <roycroft> i do think it's funny that some of the folks who poo-poo the huanyang vfds use the lack of air filtration as their excuse for hating on them
[11:28:24] <roycroft> because adding a filter is very cheap and very easy to do
[11:29:22] <roycroft> there are legitimate reasons for dislike huanyang, but lack of filtration is not one of them, imo
[11:29:52] <Rab> I think it's a good argument for putting all the electronics in a cabinet with good filtered ventilation, but of course there are plenty of applications for a standalone VFD where that's not reasonable.
[11:30:12] <roycroft> that said, my new belt grinder is still under construction, but i'm using it to finish building it
[11:30:24] <roycroft> and right now the vfd is just sitting on the bench next to the unit
[11:30:54] <roycroft> i should probably build a filtered enclosure for it very soon - i'm really taking a gamble using it like it is
[11:32:41] <roycroft> it will be ready for final cleanup and paint this weekend, though, so i'm almost done using it as a bootstrapping machine
[11:32:59] <roycroft> but i'll probably build a stand for it before i mount the vfd, and the stand will be welded steel
[11:33:02] <roycroft> so more grinding
[11:33:04] <jesseg> is huanyang the outfit that makes all those cheap VFD's that are on ebay?
[11:33:16] <roycroft> they are the "good" cheap ones that are on ebay
[11:33:21] <jesseg> ahh OK.
[11:33:28] <roycroft> there are huanyang clones all over ebay that are utter crap
[11:34:05] <jesseg> I think they have a firmware bug relating to controlling DC cap overvoltage during braking
[11:34:18] <jesseg> maybe that's the kind I had
[11:38:53] <roycroft> my memory is failing me on this, but something in the back of my mind tells me that there have been braking issues with the huanyang clones, but not with the genuine ones (other than user error)
[11:39:54] <roycroft> the biggest braking issue with genuine huanyang is not with the units themselves, but with vendors who are either unethical or ignorant
[11:40:10] <roycroft> the external braking resistor circuitry is not present in all huanyangs
[11:40:16] <jesseg> well, I was instant reversing with the mechanical reverser switch as a test to see if it could handle it. You might call that user error, but as an electronics design engineer who knows they *should* be able to handle it, to me, it was a valid test to evaluate the product.
[11:40:28] <roycroft> because it costs an extra 37 cents or so to add it
[11:41:03] <roycroft> but almost all the ebay vendors advertise the ones they sell as being capable of handling an external resistor, and most of the ones they sell are missing that circuitry
[11:41:50] <jesseg> but even without the resistor, the firmware *should* just let the motor freewheel the instant the DC cap bank voltage reaches the limit, thus preventing destruction.
[11:42:22] <roycroft> probably
[11:42:58] <roycroft> although iirc the manual discusses not setting the braking parameters too aggressively
[11:43:06] <roycroft> and warns of possible damage to the vfd if you do
[11:43:12] <jesseg> In free wheel mode, the motor can never produce a higher voltage than the power it runs on. Not unless you have a HUGE fly weight on your chuck and you quickly change your gearhead ratio to speed the motor drastically above full speed
[11:43:31] <roycroft> if i'm correct on that then the argument could be made that they are not designed to instant reverse like that
[11:43:37] <jesseg> well that's evidence of stupid firmware then, if the manual warns
[11:43:43] <roycroft> and that's not a bug, but a design decision to keep the cost down
[11:44:16] <jesseg> it's a few lines of code that once it's done, it's done. The hardware is already in there. There is no additional per unit cost.
[11:44:16] <roycroft> i've always felt a little uneasy about huanyang vfds
[11:44:36] <jesseg> They already monitor cap bank voltage and individual leg currents.
[11:44:44] <jesseg> You can go into the menus and read all those parameters.
[11:44:49] <roycroft> but at $150 for a vfd vs. $500+ for a high quality one, i grit my teeth and put up with the uneasy feeling
[11:46:05] <roycroft> that said, i'm already considering watching for a good used high quality vfd for my belt grinder
[11:46:22] <roycroft> and swapping out the huanyang as soon as i find one for a good price
[11:46:34] <roycroft> that grinder is so heavy-duty the vfd is pretty much the weak link
[11:47:25] <jesseg> In fact, the firmware did sometimes go into a freewheel state and throw an error code when I was doing instant reverses, so I know the code is already in there.. it's just buggy :D But like you said, for $150, I just got a bigger one and I try to not instant reverse, although it seems to handle use of the mechanical reverser switch if I just let it stop before starting the other way.
[11:48:00] <roycroft> i've been getting overspec huanyang vfds
[11:48:12] <roycroft> i.e with a 2hp load i use a 3hp vfd
[11:48:21] <jesseg> I did autopsy on the blown up unit, and was actually impressed with the PCB layout and stuff. They had opto isolated gate drivers and everything.
[11:48:49] <jesseg> yeah, my mill has a 3HP motor so when I blew up my 3HP vfd I found I could get the "7.5hp" unit for same cost LOL
[11:49:00] <jesseg> or was it 7.5KW?
[11:49:06] <roycroft> probably 7.5kw
[11:49:17] <jesseg> I don't remember but it was bigger both physically and parametrically
[11:49:37] <roycroft> one thing i've never sorted out is whether the load spec is with 3 phase input power or both 3 phase and single phase
[11:49:52] <roycroft> i don't have 3 phase power in my shop, so i have to feed single phase to the vfd
[11:50:18] <jesseg> yeah that has to cut the output power
[11:50:22] <roycroft> and i've read some discussion that they need to be oversize of being fed single phase power
[11:50:33] <roycroft> s/of/if/
[11:50:54] <jesseg> because they have a nice cap bank but it obviously sags between peaks, so the output voltage obviously has to sag too, and so does the power
[11:51:02] <roycroft> that makes sense
[11:51:15] <jesseg> and I'm sure they advertize it for optimal conditions then double it for ad copy :P
[11:51:39] <roycroft> i wasn't sure if that was the case, but the cost difference between a 1.5kw and 2.2kw was just a few dollars
[11:52:04] <roycroft> so to me it made sense to get bigger ones as an extra safety factor
[11:52:59] <roycroft> i have to say, btw, that i'm really impressed with my new grinder, and i'm really glad i put a 3hp motor on it
[11:53:24] <roycroft> i was grinding some 1.5" cold roll steel bar yesterday and the thing did not dog down at all
[11:53:35] <roycroft> i was able to push the bar until it started turning blue and the motor still did not slow down
[11:55:16] <roycroft> i just hope the vfd doesn't blow up soon
[11:58:02] <Connor> Someone help me out.. my maths isn't working right today. Old machine.. looks like maybe steps where set to 4064. Lead screw pitch is 1/2-20
[11:58:17] <Connor> I think the old controller was set up metric.
[11:58:33] <Connor> 4064 / 5.08 = 800 which makes sense in some way..
[11:59:16] <Connor> I do know that when machine is commanded to move 1 inch, it moves around .4985"
[11:59:35] <gregcnc> just do the math for the new setup?
[12:00:19] <Connor> I don't know what the controller is going step wise.. I.E. Full, half, 1/4 etc..
[12:00:31] <Connor> So, I'm trying to figure that out..
[12:01:01] <gregcnc> screw pitch, pulley ratio?
[12:01:15] <Connor> 20tpi, no pulley
[12:01:41] <Connor> assuming 1.8degree steppers
[12:06:14] <Loetmichel> Rab: user error. coworker used to blow swarf off the CNC router while in use like this... -> https://www.youtube.com
[12:07:01] <Loetmichel> btw: VFD works again, had to change TWO output FETs
[12:07:17] <Loetmichel> and now has kitchen exhaust filters on all air vents ;)
[12:07:56] <Connor> Hmm. wonder if it's 1.25mm pitch.
[12:08:45] <Connor> 20.32 (1.25mm) * 200 = 4096 which is what the old controller had set.
[12:08:55] <Connor> errr. 4064
[12:09:28] <gregcnc> that looks like the case
[12:09:53] <gregcnc> 200 steps /rev, full steps
[12:10:00] <Connor> new controller setup up with 4064 per inch, and it only moved .4985
[12:11:01] <jdh> 2033
[12:12:08] <gregcnc> was it accurate before?
[12:12:23] <Connor> No idea. it came loaded with mach3 pre-configured.
[12:12:29] <gregcnc> yeah well
[12:12:34] <jdh> what is it
[12:12:47] <Connor> Little taig cnc lathe.
[12:12:57] <Connor> http://www.microproto.com
[12:13:39] <Connor> I didn't see any where in mach3 config for 1/2 step mode.. and it had 4064.
[12:14:11] <Jymmm> Loetmichel: gotcha
[12:14:20] <gregcnc> closed loop?
[12:14:29] <Connor> going to double the count and try it again and see what the measurement is.
[12:14:39] <Connor> Not to the controller, only to the stepper drivers.
[12:15:28] <gregcnc> this will depend on the encoder resolution, not the stepping
[12:15:41] <gregcnc> look up the drive manual
[12:15:59] <Connor> It's proprietary.
[12:16:03] <gregcnc> ask the mfg about the screws, there is no need ot be guessing here
[12:16:49] <gregcnc> proprietary as in they wiped the chinese label off or they built their own?
[12:16:58] <Connor> Built on their own.
[12:17:19] <Connor> Board was designed in 2004 or 2005
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[12:22:01] <gregcnc> it seems like these are 20tpi
[12:22:50] <Connor> based on?
[12:23:19] <gregcnc> that's what taig produced
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[12:26:40] <gregcnc> based on their resolution claims they were half stepping
[12:26:55] <gregcnc> did you check x or Z?
[12:27:14] <Connor> That's what we're working with.
[12:27:22] <Connor> both are set @ 4064
[12:27:39] <jdh> 33
[12:27:43] <jdh> erk
[12:29:20] <Connor> I just can't get over the fact that it's so close to 1/2" set at 4064 which makes me think the screws were changed out to 1.25mm pitch
[12:31:25] <gregcnc> don't let assumptions hold you back, turn the lead screw 10 times and measure actual travel
[12:32:05] <gregcnc> 12.5 vs 12.7 should be quite clear
[12:34:34] <Connor> Can linuxcnc single point thread with index only now? I know that I couldn't do power tapping way back with just index..
[12:34:50] <Connor> never understood how mach3 could but linuxcnc couldn't
[12:35:55] <gregcnc> just depends on how accurate you want the threads
[12:36:11] <pcw_home> LinuxCNC could (almost) always thread with index only
[12:36:27] <Connor> could (almost) ??
[12:36:42] <pcw_home> well a long long time ago it could not
[12:36:53] <pcw_home> (2.2?)
[12:37:01] <Connor> okay.
[12:37:10] <Connor> Power tapping different?
[12:37:13] <pcw_home> needs encoder interpolated position
[12:37:25] <gregcnc> rigid tapping is different
[12:37:32] <Connor> ok.
[12:37:38] <Connor> Maybe that's what it was then..
[12:37:39] <pcw_home> rigid tapping needs a full encoder
[12:37:55] <pcw_home> true of any controller
[12:38:26] <pcw_home> well I guess an servo/stepper spindle could do without
[12:38:57] <Connor> pcw_home: Had heck of a time with this old controller. had to pysically swap pins 2/3 5/6 and 16/17 because the controller was expecting step and dir flipped.. and needed spindle on a non stepgen pin.
[12:39:23] <pcw_home> I think Mach3 can only thread with index
[12:40:04] <pcw_home> what controller? I could have made a config if its a new one
[12:40:25] <Connor> and the way pncconf displays the pins/ports for the g540 is hard to follow when trying to match it up to parallel port pinout.
[12:40:51] <Connor> The controller in this thing.. http://www.microproto.com it's custom to this company..
[12:41:16] <Connor> I just ended up making a db25 to db25 adapter.. I need to pull off extra wires anyway for the limit/home switches.
[12:41:56] <pcw_home> Yeah it would be nice if pncconf should show the PP pins on PP compatible FPGA cards
[12:42:05] <pcw_home> would show
[12:42:51] <pcw_home> the info is available from the pinout file or mesaflash --readhmid
[12:43:04] <Connor> I ended up hooking it up to a different machine with a pp to make sure I had the pin mapping correct.. then used the .pin file to map it out for the 5i25
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[12:49:02] <gregcnc> it appears the manual for these machines included steps to correct for lead screw error
[12:49:25] <Connor> link?
[12:49:34] <gregcnc> I'm guessing the preivous owner made mistakes as it shows 8000steps/inch to be default for the mill
[12:49:52] <gregcnc> https://www.soigeneris.com
[12:50:38] <Connor> it's possible.. that's for the mill not the lathe.
[12:50:53] <gregcnc> so have you measured the screw yet?
[12:51:08] <Connor> I'm going to test it with mach3 and see what it does, the try 8000 and 8128
[12:51:14] <Connor> I'm not at the machine.
[12:51:28] <Connor> at home right now doing research for when I get back in front of it.
[12:53:14] <gregcnc> but if you were short on travel with 4064, it's certainly not going to move 1" at 8000
[12:53:45] <Connor> right.. which is what was confusing the crap out of me.
[12:54:22] <gregcnc> that's when you start measuring
[12:54:44] <Connor> Other possibility is, it steps on low vs high on the stepper driver.. I saw one of those (not direction) inverted. But that made no sense to me either.
[13:01:40] <gregcnc> 4064 makes sense for 2.5mm pitch screws
[13:02:04] <Connor> at half distance?
[13:02:12] <Connor> double number for 1 inch..
[13:02:32] <gregcnc> no, but 4064 isn't right anyway it seems
[13:04:04] <gregcnc> 4604 steps /inch is 400step/rev with 2.5mm pitch
[13:08:04] <gregcnc> Taig currently versions with 2.5mm ballscrew as an option. ...with the microproto control
[13:09:16] <Connor> So, it's possible that either a) it was configured for ball screw and it's not.. or b) it's half stepping and need to double the counts.
[13:11:03] <gregcnc> 4064 would be for 2.5mm pitch, and 8000 for 20tpi, if it's something other than that who knows how it got that way.
[13:11:34] <gregcnc> half step in both cases
[13:19:19] <Connor> .9995" at 8128
[13:19:45] <Connor> within the tolerance of measuring equipment we're using..
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[13:56:43] <gregcnc> connor on X or Z?
[13:56:55] <Connor> Z
[14:01:18] <gregcnc> hmm. so is it 1.25mm pitch or 800 step/rev
[14:03:11] <Connor> we tested both.
[14:04:23] <gregcnc> both??
[14:04:51] <Connor> Yea. Both X and Z.. have the same pitch
[14:05:51] <gregcnc> in diameter mode X on a lathe should move half of commanded
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[14:07:25] <Connor> We did it using jog. I'm not sure if it was in diameter mode or not.
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[14:23:36] <gloops> The worlds largest 3D printed rocket engine set to power new UK launcher spearheading Britain's revitalised space ambitions http://ow.ly
[14:28:14] <jym> gloops: SMH
[14:30:00] <gloops> nothing can go wrong lol
[14:31:01] <jym> gloops: Nothing can go right either it seems =(
[14:33:37] <gloops> we could be on the moon before Greece
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[14:44:37] <jym> gloops: been there done that, got the tshirrt
[14:44:40] <roycroft> we've been on the moon, before anyone else
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[14:46:11] <gloops> yes, fair amount of scepticism over that though roycroft
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[15:00:15] <net|> https://www.thingiverse.com for canadians with old doors
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[16:01:28] <XXCoder> roycroft: yeah its so easy to use velco around intake and use fiber mat on it
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[18:27:59] <andypugh> Quiet night?
[18:28:30] <XXCoder> looks like
[18:28:56] <andypugh> Still trying to make RTAI work
[18:30:31] <andypugh> But I do now have Stretch running on 3.16.52-RTAI or 4.9.80
[18:30:42] <andypugh> I just can’t get RTAI to work on either.
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[18:56:27] <skunkworks> andypugh: did you see
[18:56:28] <skunkworks> http://www.electronicsam.com
[18:57:50] <andypugh> Good numbers. The machine I am struggling with is nearly that good with preempt-rt.
[18:58:05] <skunkworks> That is what this is too
[18:58:08] <skunkworks> amazine
[18:58:12] <skunkworks> amazing
[18:58:17] <andypugh> But I rather feel we need an RTAI option.
[18:58:24] <skunkworks> right - it would be nice
[18:58:42] <andypugh> But we need a LiveCD that works more.
[18:59:23] <andypugh> In the spirit of “it’s easier to ask forgiveness than permission” I think I will change the download link this weekend.
[19:00:45] <skunkworks> I played with it and it seems like it will do 25us base thread. that would be 40khz..
[19:00:57] <skunkworks> (this thing has a printer port too)
[19:10:19] <jthornton> I think the download link should be like before and go to a page that lists all the downloads
[19:10:49] <jthornton> it would be so much easier for folks supporting older systems
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[20:45:52] <andypugh> JT-Shop: I seem to recall you have an opinion about BobCAD?
[21:40:14] <pink_vampire> Tom_itx: I have something for you
[21:40:35] <XXCoder> yay got some arty supplies :) im so ready for playing with black 3.0 and pinkest pink
[21:41:16] <gregcnc> bobcad, ewww
[21:41:22] <pink_vampire> I need a threaded cap with 16mm major diameter, and 1mm pitch
[21:41:57] <gregcnc> to be honest it's been years since i overpaid for that crap software
[21:46:35] <Tom_itx> ?
[21:49:15] <pink_vampire> Tom_itx: you are the thread milling master
[21:52:02] <Tom_itx> no not really
[21:56:14] <pink_vampire> https://i.imgur.com
[21:56:35] <pink_vampire> I need to make this part, that go on the bottom part
[21:57:29] <pink_vampire> other way is to make it with triangular boring bar
[22:00:21] <XXCoder> what part # on your paper are you making now?
[22:00:55] <pink_vampire> non of them
[22:01:01] <pink_vampire> I'm cleaning
[22:03:58] <XXCoder> oh
[22:04:11] <XXCoder> its missing a cap?
[22:06:09] <pink_vampire> yeah
[22:06:17] <pink_vampire> and there some broken parts
[22:06:30] <pink_vampire> amd damaged bearings
[22:06:39] <XXCoder> wonder of you can make one with lathe or is lathe down currently?
[22:12:35] <pink_vampire> this is just the milling head for it, and i have cnc mill next to it
[22:40:55] <roycroft> i just finished welding up the table holder fixture for my belt grinder
[22:41:00] <roycroft> fabrication is complete now!
[22:41:11] <roycroft> i have to make some tables - i'll make a couple tomorrow
[22:41:17] <roycroft> but i should be painting this weekend
[22:45:19] <Tom_itx> pink_vampire is that a standard thread?
[22:45:23] <Tom_itx> doesn't appear to be
[22:45:54] <Tom_itx> 16-2 or 16-1.5 look standard
[22:46:04] <pink_vampire> 16-1
[22:46:55] <Tom_itx> so ~5/8z
[22:47:01] <Tom_itx> so ~5/8"
[22:47:06] <Tom_itx> roughly
[22:47:20] <pink_vampire> 16mm major
[22:47:34] <Tom_itx> what's the minor diameter?
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[22:51:56] <pink_vampire> no idea
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[22:52:35] <pink_vampire> whatever make triangle
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[22:53:39] <Tom_L> http://www.tanoi-mfg.co.jp
[22:54:18] <Tom_L> 14.917 - 15.153
[22:55:44] <Tom_itx> can't tell much from that pic
[22:59:04] <Tom_itx> fairly fine thread
[22:59:38] <Tom_itx> how many threads does it need?
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[23:16:26] <Tom_itx> pink_vampire
[23:16:53] <Tom_itx> http://tom-itx.no-ip.biz:81
[23:16:56] <Tom_itx> might be close
[23:17:06] <Tom_itx> 10 threads cause i didn't know how many
[23:17:38] <Tom_itx> err 15... sry
[23:18:10] <Tom_itx> but you don't have my threadmill so it's a moot point
[23:18:21] <XXCoder> whats its z home at?
[23:18:26] <XXCoder> part orgin z
[23:18:37] <Tom_itx> bottom of the hole
[23:18:53] <Tom_itx> actually the start of the first thread
[23:18:57] <XXCoder> then number of threads dont really matter
[23:19:03] <Tom_itx> no
[23:19:08] <XXCoder> as long as its enough anyway
[23:19:33] <Tom_itx> but that thread would probably be too tight because i used nominal numbers
[23:19:43] <XXCoder> 100% enagement eh
[23:19:52] <Tom_itx> no
[23:19:59] <Tom_itx> just no clearance calculated in
[23:20:08] <XXCoder> can always decrease tool diamaeter by small amount
[23:20:32] <pink_vampire> now I just need the tool
[23:20:34] <XXCoder> make threads slightly erm deeper? not sure what word to use
[23:20:41] <Tom_itx> i'm not sure i've ever used taht metric post either but it should work
[23:20:49] <pink_vampire> i need to pull a bearing
[23:20:52] <Tom_itx> may need a G20-21 in there
[23:21:02] <XXCoder> whats g20 and 21?
[23:21:06] <XXCoder> oh yes
[23:21:09] <XXCoder> imp vs metric mode
[23:21:10] <Tom_itx> XXCoder my bud uses cutter comp
[23:21:34] <XXCoder> oh your gcode dont use g43 d31
[23:22:08] <Tom_itx> add to the preamble whatever you like
[23:22:19] <XXCoder> pretty cool
[23:22:21] <Tom_itx> mine works perfect for me
[23:22:39] <XXCoder> man wish i have shop space :(
[23:23:07] <Tom_itx> z clear could be wrong too, i guessed
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[23:23:31] <pink_vampire> I'm not sure how to even start with thread milling, each cutter is so expensive,,
[23:23:39] <Tom_itx> based on a threadmill diameter of .490"
[23:24:04] <XXCoder> i typically use g0 z3.; g40 x0. (or y0, whatever shorter); g28z0.y0.
[23:24:23] <Tom_itx> http://onlinecarbide.com
[23:24:32] <XXCoder> z3 depends on parts, but 3 inch rise tend to be enough
[23:24:35] <Tom_itx> that's the cutter i programmed for
[23:24:57] <Tom_itx> XXCoder depends on the mill. i don't have 3" :)
[23:25:08] <XXCoder> indeed. cnc router eh
[23:25:09] <Tom_itx> but normally that's what we did
[23:25:42] <pink_vampire> for 60$ i just outsource it or do it on the lathe
[23:25:50] <XXCoder> oh above was for closing after end of program, before m30
[23:26:02] <pink_vampire> it is just an internal thread
[23:26:02] <XXCoder> forgot to say so lol
[23:28:16] <Tom_itx> yeah i'd do it on a lathe if i could too
[23:29:17] <pink_vampire> https://www.ebay.com
[23:29:48] <pink_vampire> what is the size of the cutter?
[23:30:23] <Tom_itx> it's in the link
[23:30:31] <Tom_itx> .490" iirc
[23:31:40] <Tom_itx> that was for a 5/8 thread which is close
[23:31:52] <Tom_itx> the cutter that is...
[23:32:45] <pink_vampire> the only stock i have is brass
[23:33:03] <pink_vampire> the cold rolls stock i have is 3/4"
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