Re: [Emc-users] Knurling with a threading tool using spindle coordinated motion (G33) on EMCOTurn 120P CNC lathe

That's pretty slick, I'll add this to my ngcgui routines for sure. Thanks for sharing the code. JT On 9/11/2015 6:52 PM, Tom Easterday wrote: > Here is a video of our G33 knurling routine running. Pretty cool. I’m sure > we aren’t the first to do this, but since I haven’t seen it before I

Re: [Emc-users] Knurling with a threading tool using spindle coordinated motion (G33) on EMCOTurn 120P CNC lathe

The GS2 is a simple V/Hz control which is open loop. 208V @ 60Hz = 1800rpm simply scales 1/18 to 11.5V @ 3.3Hz = 100rpm. Nonlinearities will often cause problems at very low speeds in an open loop system. (Note: the GS2 might have some functions to boost the voltage at low speeds and such to

Re: [Emc-users] Knurling with a threading tool using spindle coordinated motion (G33) on EMCOTurn 120P CNC lathe

Hi Tom, What spindle motor are you using that can reliably get down to 100 RPM? MY 3phase with a GS2 VFD and barely handle 400 RPM. Thanks, Drew On 9/12/15 8:39 AM, Tom Easterday wrote: > On Sep 12, 2015, at 10:51 AM, Gene Heskett wrote: >> I see that video, very

Re: [Emc-users] Knurling with a threading tool using spindle coordinated motion (G33) on EMCOTurn 120P CNC lathe

Hi Drew, The motor is a 3-phase Black Max 3HP inverter duty motor (Marathon Electric brand bought through Automation Direct). When I first installed it and used the basic settings on the VFD I could not run below about 300rpm or the current would spike and the VFD would trigger a shut down.

Re: [Emc-users] Knurling with a threading tool using spindle coordinated motion (G33) on EMCOTurn 120P CNC lathe

Cool, post it in the forum with your other routines when you do. Also I should point out that knurlPerDia is probably misnamed. Might better be called knurlPerCircum or threadPerCircum. Essentially, it is the number of threads cut across the circumference of the piece. The number we use is

Re: [Emc-users] Knurling with a threading tool using spindle coordinated motion (G33) on EMCOTurn 120P CNC lathe

If you swap out the knurlPerDia definition line with the following two lines, it will calculate the number of knurls to cut from workpieceDia: # = 12 # = ROUND[[# * 3.14159 * #]] > On Sep 13, 2015, at 1:06 PM, Tom Easterday wrote: > Also I should point out that knurlPerDia is

Re: [Emc-users] Knurling with a threading tool using spindle coordinated motion (G33) on EMCOTurn 120P CNC lathe

On Saturday 12 September 2015 11:39:45 Tom Easterday wrote: > On Sep 12, 2015, at 10:51 AM, Gene Heskett wrote: > > I see that video, very impressive. But what sort of a threading > > tool can be driven at that high a side angle? None of the inserts I > > have, have that

Re: [Emc-users] Knurling with a threading tool using spindle coordinated motion (G33) on EMCOTurn 120P CNC lathe

On 09/12/2015 07:38 AM, sam sokolik wrote: > Great work! I wondered how well that would work. (files that video > away under 'linuxcnc is awesome') > > I did this a LONG time ago, on a manual lathe. I set it for the coarsest thread it could do, and then hand-cranked the leadscrew (which drove

Re: [Emc-users] Knurling with a threading tool using spindle coordinated motion (G33) on EMCOTurn 120P CNC lathe

On Sep 12, 2015, at 10:51 AM, Gene Heskett wrote: > I see that video, very impressive. But what sort of a threading tool can > be driven at that high a side angle? None of the inserts I have, have > that sort of high angle side clearances. It is one of these, reversed in

Re: [Emc-users] Knurling with a threading tool using spindle coordinated motion (G33) on EMCOTurn 120P CNC lathe

On Saturday 12 September 2015 07:48:36 John Alexander Stewart wrote: > Very neat - thank you for posting the code and the video. > > On Fri, Sep 11, 2015 at 7:52 PM, Tom Easterday wrote: > > Here is a video of our G33 knurling routine running. Pretty cool. > > I’m sure we

Re: [Emc-users] Knurling with a threading tool using spindle coordinated motion (G33) on EMCOTurn 120P CNC lathe

Very neat - thank you for posting the code and the video. On Fri, Sep 11, 2015 at 7:52 PM, Tom Easterday wrote: > Here is a video of our G33 knurling routine running. Pretty cool. I’m > sure we aren’t the first to do this, but since I haven’t seen it before I > will pretend

Re: [Emc-users] Knurling with a threading tool using spindle coordinated motion (G33) on EMCOTurn 120P CNC lathe

Great work! I wondered how well that would work. (files that video away under 'linuxcnc is awesome') sam On 09/11/2015 06:52 PM, Tom Easterday wrote: > Here is a video of our G33 knurling routine running. Pretty cool. I’m sure > we aren’t the first to do this, but since I haven’t seen it

[Emc-users] Knurling with a threading tool using spindle coordinated motion (G33) on EMCOTurn 120P CNC lathe

Here is a video of our G33 knurling routine running. Pretty cool. I’m sure we aren’t the first to do this, but since I haven’t seen it before I will pretend like it :-) BTW, this knurl is only about 5 thou deep, deeper ones will follow. https://youtu.be/zdCQ0X7b2uo Here is the code: G8 G53