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motors chatter
« on: February 21, 2007, 08:54:51 AM »
My name is Geo Hagen and I am a newbie.
I am just setting up mach3 with the drivers and motors

I have a problem with some mach3 screens and the behavior of the motors.
In the program run, offset, settings and diagnostics screen my motors don't run smooth.
In the other screens, MDI and Toolpath, everything runs smooth.
Any suggestions?
Geo Hagen

Offline chad

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Re: motors chatter
« Reply #1 on: February 21, 2007, 05:57:57 PM »
What kind of machine (computer and mill) do yo have? How fast, how much ram?
are you running any cam prorams in the background?

Chad

Re: motors chatter
« Reply #2 on: February 22, 2007, 02:40:13 AM »
Chad,
Thanks for the reaction.

Mill:
homemade conversion of a Cincinnati Millacron PF25
tree 6.4 Nm 1.8 full stepper motors
tree bipolar drivers up to 25600 microsteps/rev.(jumper selection) 20 Vdc- 50 Vdc
Computer:
Dell Latitude D800 notebook
1.5 Ghz
1 GB Ram
Breakout bord:
CNCdirect breakout board for Mach3

When I run a test g-code program I only use Mach3.
I even tried to turn of all the start up programs at windows start up.
Turned off all the energy power saving programs and screen protection.

I ran drivertest.exe and this looks better with all those programs turned of, but the result is exactly the same with or without turning the programs on or of.

What I don't get is what is the difference between the screens in Mach3, what could cause the difference in behaviour of the motors?
Geo Hagen

Offline Chip

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Re: motors chatter
« Reply #3 on: February 26, 2007, 10:11:52 PM »
Hi, Chad

Try this, It could be In Config, Motor Tuning the Pulse Width set to low, Step, Dir Pulse's, If there set to 0 set them to 5,

If that fixes it, back them down till problem is back, then set it backup 1 level. ( time that the Opto's have to see Mach Pulse's), it may

change from screen to screen not sure.

If it's ver. Mach32.0.049 re-download it, may have the giters.

Hope this Helps, Chip
« Last Edit: February 26, 2007, 10:48:16 PM by afn09556 »
Re: motors chatter
« Reply #4 on: February 26, 2007, 11:45:50 PM »
also you can check Sherline mode under the ports and pins... that will give you a much longer pulse for your opto's
Fixing problems one post at a time ;)

www.newfangledsolutions.com
www.machsupport.com
Re: motors chatter
« Reply #5 on: February 27, 2007, 04:50:50 AM »
Thank for the reaction.

I did everything mentioned above, with no results.
I noticed that in the Toolpath screen the processor of the computer uses 70-100 % of the capacity.(task manager)
In the screen Program run only 15-17 % of the capacity.
Isn't that strange?
Any explanation?
Geo Hagen
Re: motors chatter
« Reply #6 on: February 27, 2007, 03:26:57 PM »
Run the Driver test and tell me what you see (BTW you can't have mach3 open at the same time)
Fixing problems one post at a time ;)

www.newfangledsolutions.com
www.machsupport.com
Re: motors chatter
« Reply #7 on: February 28, 2007, 03:08:47 AM »
Brian,

I ran the driver test and hereby a screenshot.
This looks clean to me.
I attached a small video (zip file) with switching from screen Program run to Toolpath.
You can hear the difference clearly.

I was also thinkingh off a limitation off the free downloadable version I use.

Geo Hagen
Geo Hagen
Re: motors chatter
« Reply #8 on: February 28, 2007, 08:29:20 AM »
That is a bad driver test.. it should look like a flat line...

Do you have a desktop that you can test with? if you are going to use that computer you need to use the optimization doc to see if you can get the driver test better.
Fixing problems one post at a time ;)

www.newfangledsolutions.com
www.machsupport.com
Re: motors chatter
« Reply #9 on: February 28, 2007, 08:52:32 AM »
Brian,

Where I'm still confused about is the difference in motor behavior between the screens?
How can that take effect on generation off pulses or the performance off the computer?

At this moment I don't have an other computer available.
I will see to get a desktop computer to test.
Maybe I borrow the computer from my wife.
Don't tell her!!

Geo Hagen