School Me - Cnc Circle Cutting Test. Mach3, Amoeba's For Circles.

Update: Much Much better performance after quite a learning experience. Here is the follow-up to help future Newbs possibly.

Machine: Shopmaster Patriot. Not the new Mill Turn.
There were several helps on this noted below.
  • Setup Backlash adjustments. Gage based Measurements, Motor tuning, and Mach3settings based on Hoss Vid.
  • Mach3- Turn off CV on angles >90 degrees (Mach3, General config settings checkbox) Read to try in a few places.
  • Fixing the Quill movement via a socket-screw into a machined quill slot. (biggest gains on this 1 fix for me).
  • Setting the tapered gib adjustments and experimenting with too loose, too tight- until best results.

All circles are right in there now! Very close (.001 / .002 ) from circle to circle. And .001 to .002 in 2 measurements 90' apart on circle. Ran groups of three circles 3 times. What seems really cool now is that Mach3 and the glass DRO's are displaying tens to a thou difference. Fluke or finally dialed in- Time will tell. But cool to see.

Learned a Lot! Experiment, learn, repeat. Man this stuff is not for the impatient that is for sure.

CGout.

circle001.jpg
 
Happy to hear it's better. Patients pays off. :)
 
Glad to read you've figured it out.
I'm running Mach 3 on a ten year old plasma table and under "configurations" (top bar menu ) allows for calibrations inputs. Not sure if your version of Mach is similar, but I was able to recently recalibrate my steppers after timing/drive belt replacement.
Sorry for the late reply, but I've been off line lately.
As others have mentioned, critical holes require boring and fine finish cutting.
I need to start over on Mach some time in the near future as I'm still running Windows XP.

Glad to read you and your son spend time in the shop together.
 
Cut a circle, triangle, square then compare them to the program. this is what we do at work. Checks that both X&Y motors run consistent. I would do a 2" of each. Tim
 
Hey Firestopper- Just noticed your Pic on the Avatar. WOW! That is a clean looking shop. Very nice indeed!
CG.

firestopper said:
Glad to read you've figured it out.
I'm running Mach 3 on a ten year old plasma table and under "configurations" (top bar menu ) allows for calibrations inputs. Not sure if your version of Mach is similar, but I was able to recently recalibrate my steppers after timing/drive belt replacement.
Sorry for the late reply, but I've been off line lately.
As others have mentioned, critical holes require boring and fine finish cutting.
I need to start over on Mach some time in the near future as I'm still running Windows XP.

Glad to read you and your son spend time in the shop together.
Click to expand...
 
Thank you CG,

I finally built my dream shop. Keeping it clean is a work out haha, but worth it.
 
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