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Author Topic: Mach3Turn rapid speed question  (Read 3763 times)

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kenserdar

• 9
Mach3Turn rapid speed question
« on: April 03, 2010, 08:11:40 PM »
For some reason my lathe doesn't like G0 rapids? I can replace all G0's with G1's and the code will run OK.
The code has a F12 to set the feed rate. But the rapids still try to go much faster?

Jog works OK - I have the jog set to ~12% to keep the ipm below 12.
The really strange thing is my motor tuning parameters: Velocity - 85, Acc - 20.

How do I get my rapid speed down without changing motor tuning parameters?

Ken

M250cnc

• 591
Re: Mach3Turn rapid speed question
« Reply #1 on: April 03, 2010, 08:26:13 PM »
Ken you must set the motor tuning first there are examples in the member docs section

Phil
The Good Thing About Mach3, Is It's very Configurable

kenserdar

• 9
Re: Mach3Turn rapid speed question
« Reply #2 on: April 03, 2010, 08:32:11 PM »
Ken you must set the motor tuning first there are examples in the member docs section

Phil

Huh??? If I didn't set the motor tuning parameters ... How could I post them here?

Ken

M250cnc

• 591
Re: Mach3Turn rapid speed question
« Reply #3 on: April 03, 2010, 08:39:21 PM »

Huh??? If I didn't set the motor tuning parameters ... How could I post them here?

Ken

Yes but as you cannot use G0 they are set incorrectly

Phil
The Good Thing About Mach3, Is It's very Configurable

RICH

• 7,411
Re: Mach3Turn rapid speed question
« Reply #4 on: April 03, 2010, 08:53:14 PM »
Ken,
Set the velocity at 20 and an acceleration at 2, then try 30 and an accel of 3, keep working your way up until they skip , then back off by 30 %. use that velocity as the max. Now start increasing  just the acceleration with that max velocity.
G00 - is  a rapid movement at the max velocity you have set in motor tuning
I assume they are steppers.
RICH

kenserdar

• 9
Re: Mach3Turn rapid speed question
« Reply #5 on: April 03, 2010, 11:03:33 PM »
Ken,
Set the velocity at 20 and an acceleration at 2, then try 30 and an accel of 3, keep working your way up until they skip , then back off by 30 %. use that velocity as the max. Now start increasing  just the acceleration with that max velocity.
G00 - is  a rapid movement at the max velocity you have set in motor tuning
I assume they are steppers.
RICH

RICH ... Have you got a filter for my stupid questions?
With your answer, I realized, that I was testing my motor tuning with a 13% "jog" command. IE 85 (VEL) * .13 = 11.05 ipm. Not a G0 rapid command. To stop this in the future. I cranked the jog to 100%.

Turns out my MAX Velocity is 16. Thus, 16 - (.3*16) = 11.2
I already knew, I couldn't run these motors faster then 12 ipm. I just couldn't see how the "85" velocity was working.

Thanks again
Ken

RICH

• 7,411
Re: Mach3Turn rapid speed question
« Reply #6 on: April 04, 2010, 07:23:15 AM »
kEN,