Rough Motion on Circular Toolpaths

[Salted_Pork]

I ran your G-code on my machine. Without smoothing on my machine got up to about 250 ipm. With smoothing on using a custom profile that I use most of the time I got up to 395 ipm. It is a small circle and my clearpath motors RAS setting of 99ms may affect that as well.
Bill

Thanks for testing that out Bill! Thats interesting. Are you on a 4x8 router as well?

[avp]

5 x 8 home built.

[Salted_Pork]

great.
now i would try a different PC.
run the PC tuner on it and simply copy the CNCM directory from the existing PC to the new one (no need to reinstall v5.1)
and run your test file again.

if problem still exists, they evidence is pointing more and more to motor/drive related issues (not tuned properly?, under sized? etc..)
remind me what make and model you are using again.

Can you think of any setting that I have wrong in CNC12? Before I go buy a new PC, do you know why an unfit PC would cause this problem?

Thoughts on this Keith?

[cnckeith]

trying a different pc is just a basic debug technique to quickly eliminate the PC as a possible source of an issue.
i carry spare $150 PC's with me just for this purpose, that way i don't have to spend hours/days working on someone else's PC to try and solve an issue. its probably not the PC BUT you never know until you swap it out, just good debug by isolation advice.

did you try a g code program generated by Intecon? this would eliminate the G code file you are using or not.

[cnckeith]

remind me did these drives have drive tuning software?

and you could try messing with delta v max but, you might be going down a rabbit hole with that one.
https://centroidcncforum.com/viewtopic. ... 707#p82707

[Salted_Pork]

Hey Keith!

Testing out some gearing today, and had a question.

In the wizard, it won’t let me go above a certain max rapid ipm. The max allowable value changes with the rotation per inch number (and other factors I can’t figure out). I want to see where the limit of my motor is, as the manual suggests, but the wizard won’t let me input a higher max rapid value.

How can I see how fast my motors will spin? Is there a way to disable that in the wizard?

[suntravel]

Pulse Frequency x 60 / Step/Rev is the max rpm

100000 Hz x 60 / 3200 Step/rev =1875 rpm

Uwe

[tblough]

kHz should read Hz in the example equation since 100kHz has already been converted into Hertz.

[suntravel]

kHz should read Hz in the example equation since 100kHz has already been converted into Hertz.

sure, I changed it...

Uwe

[cnckeith]

Hey Keith!

Testing out some gearing today, and had a question.

In the wizard, it won’t let me go above a certain max rapid ipm. The max allowable value changes with the rotation per inch number (and other factors I can’t figure out). I want to see where the limit of my motor is, as the manual suggests, but the wizard won’t let me input a higher max rapid value.

How can I see how fast my motors will spin? Is there a way to disable that in the wizard?

the Wizard is telling you with the settings you choose the number you entered is impossible

review this post.
viewtopic.php?f=63&t=1801

most steppers have a 100,000 step per second limit (a few go to 200,000, many stepper drive manuals say they go to 200,000 but in reality they don't) this reason alone is a good reason to use a real servo drive that can accept much higher step rate signal from Acorn and run at much better speeds with more steps per inch which results in smooth fast motion.