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Author Topic: Manual Motor tuning  (Read 27195 times)

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Offline Yodawill2000

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Re: Manual Motor tuning
« Reply #20 on: November 03, 2006, 11:25:35 AM »
Quick voltage question.
If I send more voltage to my stepper will the RPM increase accordingly?
With no changes made in Mach motor tuning ?
I want to experiment with a driver I know nuttin' about.
If the RPM increases I will know Im tweaking the right direction :)
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Hood

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Re: Manual Motor tuning
« Reply #21 on: November 03, 2006, 03:22:21 PM »
If you use the auto calc it will set the correct steps per unit, after that you may need to change the acceleration and velocity to get your motors running sweet but dont touch the steps per unit.
 What is the pitch of the screw? are your drives full, half or ???? stepping?
Hood
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Offline Yodawill2000

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Re: Manual Motor tuning
« Reply #22 on: November 03, 2006, 03:33:16 PM »
Its driving the micro feed shaft on a Mill/Drill ..  no screw involved until I convert it to the ballscrew setup.
This is a temp solution.
Im not near the machine right now, cant remember the make of the drive.
140 Oz , 200 spr  eight wires coming out of it.

Lots of help I am huh  .. hehe 
If I auto calc it and tune to be smooth it takes about a minute to move an half inch.
Thats why I want to increase the voltage as Im sure its set to motor spec .
I keep reading here that you should set the voltage WAY above spec.
I suppose my frustration is the X and Y ballscrews are driven by some nice servo's.
Set those up in about 10 minutes !!  Spoiled me .. hehe 
« Last Edit: November 03, 2006, 03:36:03 PM by Yodawill2000 »
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Hood

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Re: Manual Motor tuning
« Reply #23 on: November 03, 2006, 03:38:20 PM »
After  you do  autocalc do you get the correct movement? If yes then all you can do is try and tune, no point in making the steps per unit larger/smaller as all that will happen is the axis wont move the correct distance.
 For the voltage, yes you want as much as you can (up to 20x max motor voltage) BUT be sure your drive can handle it, some of the smaller drives are 24V MAX.
Hood
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Offline Yodawill2000

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Re: Manual Motor tuning
« Reply #24 on: November 03, 2006, 03:43:40 PM »
Gotcha !!
I happen to have 2 spare drives in case I blow it up  :)
I originally planned on going all Stepper but ended up buying a X/Y servo setup , After I bought the stepper gear. 
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Offline Yodawill2000

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Re: Manual Motor tuning
« Reply #25 on: November 04, 2006, 10:06:24 AM »
Getting closer here !!!
Got the z motor running calibrated.
The only Issue I have now is errant Limit switch errors when Im not
near a limit ?
It even happened once when no motors where moving ??
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Offline Chaoticone

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Re: Manual Motor tuning
« Reply #26 on: November 04, 2006, 10:41:54 AM »
Hey Yoda,
Time To TS, not to be confused with BS. ;D Check your wiring, switches, are your cables shilded? Could be noise.
What kinda feed rate did you end up with?
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Offline Yodawill2000

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Re: Manual Motor tuning
« Reply #27 on: November 04, 2006, 10:53:09 AM »
All the cables are well sheilded.
This didnt start until I set up the z motor so thats where Im gonna start.
Connections are all correct and tight.
Might need to get a better stepper driver. But money is way tight right now  >:(
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Hood

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Re: Manual Motor tuning
« Reply #28 on: November 04, 2006, 12:14:54 PM »
Set the debounce to 1000 and see if that helps.
Hood
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Offline Yodawill2000

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Re: Manual Motor tuning
« Reply #29 on: November 04, 2006, 02:18:13 PM »
Its was  I went to 1250 and still get the limit issue.
Bumped up Mach to the latest version , still getting it.

need to check for noise .
I have everything grounded quite well.
Tweakage will continue ... 
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