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Author Topic: Acceleration problem  (Read 6254 times)

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Offline Greolt

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Acceleration problem
« on: March 01, 2007, 05:04:24 AM »
I have got to the stage where I am doing test runs on my almost completed router.

I have set velocity and acceleration to a conservative level on the Z axis.

When jogging at 100% or doing G0 moves on the MDI screen the Z moves very smoothly.

Then when air cutting the Roadrunner, I can hear that the Z is jumping steps as it ends a move.

It is like it moves too quickly and stops too suddenly. Either up move or down.

Should not the velocity and acceleration as set in Motor Tuning be the overriding limit?


I just had a thought  :o  Setting the scale up to 10 may have affected  this ....... would it ???


If that is so then changing the scale at the DRO discards the motor tuning.  Could this be so ???
« Last Edit: March 01, 2007, 05:08:06 AM by Greolt »

Offline Chaoticone

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Re: Acceleration problem
« Reply #1 on: March 01, 2007, 05:24:12 AM »
Are you running in feed override? If so, do you have no FRO on Queue checked in general config? (Far right Middle) Do you have backlash comp. enabled? What version of Mach are you running?

Brett
;D If you could see the things I have in my head, you would be laughing too. ;D

My guard dog is not what you need to worry about!

Offline Greolt

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Re: Acceleration problem
« Reply #2 on: March 01, 2007, 05:51:34 AM »
Brett

Yes I was running feed rate override.

No back lash comp.

Version R2.0.040

The "FRO on queue"  I can not check now.

It is late and I have come in from the shed before the neighbors complain.  ;D

What should it be set to ?

Greg

Offline Chaoticone

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Re: Acceleration problem
« Reply #3 on: March 01, 2007, 05:54:12 AM »
Hey Greg,
   It is just a box that you put a check mark in. You want to have a check mark in the box.


Brett
;D If you could see the things I have in my head, you would be laughing too. ;D

My guard dog is not what you need to worry about!

Offline Greolt

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Re: Acceleration problem
« Reply #4 on: March 01, 2007, 05:56:48 AM »
\
Can you give a description of what it does or does not do  Brett

Offline Chaoticone

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Re: Acceleration problem
« Reply #5 on: March 01, 2007, 06:02:29 AM »
Not a good one. The FRO means feed rate override. Queue, I don't know. I do know this, it was added in the later versions to fix the problem of Mach trying to run the motors at higer speeds (while in FRO) than set in motor tuning.

Brett
;D If you could see the things I have in my head, you would be laughing too. ;D

My guard dog is not what you need to worry about!

Offline moxy

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Re: Acceleration problem
« Reply #6 on: March 01, 2007, 06:21:03 AM »
Hi All, I have recently joined the forum and find it a great source of info. I just opened a query which resulted in a "Mach 3 now working with vista" display which I can't get rid of. Seems to be some sort of malacious code. Any advise other than a sledge hammer?  I also managed to bring up the pop up that allows you to control jogging etc (by accident.. had a schematic sheet lying on the keyboard and I don't know what was keyed in to do this.) Any suggestions?
Les

Offline Chaoticone

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Re: Acceleration problem
« Reply #7 on: March 01, 2007, 06:28:34 AM »
Hey les,
    The tab key should get rid of the MPG screen. I don't know about the other yet.

Brett
;D If you could see the things I have in my head, you would be laughing too. ;D

My guard dog is not what you need to worry about!

Offline Greolt

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Re: Acceleration problem
« Reply #8 on: March 01, 2007, 06:41:35 AM »

Thanks Brett.  I'll give it a try tomorrow.

Offline moxy

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MPG
« Reply #9 on: March 01, 2007, 06:52:45 AM »
Hi Brett, I got rid of it by selecting  the main Mach3 sceen but I'm still stuck in single step mode(which was what I was looking for in the first place). Will a tab bring MPG up again? many thanks
Les