Lathe calibration problem
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Terry1956
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Lathe calibration problem
Hi, I am trying to calibrate my cnc lathe. I have been using the turns per revolution calculator from this forum. However I am getting some odd results. My stepper drivers are set to 5000 steps per revolution. My bullscrew is direct drive and it takes 6.25 turns for 25mm. I started with a small movement command. G0 z5 f1, the machine moved 24mm. I input the calculation into the calculator and input the results into c12. Switched off both c12 and the acorn board. Restarted both. Input the same command again, but nothing has changed. What am I doing wrong?
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CentroidFrog
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Re: Lathe calibration problem
How are you inputting this new value, through the wizard?
You're sure to hit the "Write settings to CNC control configuration" button after changing the value?
You're sure to hit the "Write settings to CNC control configuration" button after changing the value?
Want to post your own question?
Check this out first: http://centroidcncforum.com/viewtopic.php?f=60&t=1043
Acorn CNC tech tips: viewforum.php?f=63
Check this out first: http://centroidcncforum.com/viewtopic.php?f=60&t=1043
Acorn CNC tech tips: viewforum.php?f=63
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Terry1956
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Re: Lathe calibration problem
Yes through the wizard. And I do hit write settings before closing. The green bar shows up etc.
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suntravel
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Re: Lathe calibration problem
metric or imperial setting on your machine?
What kind of steppers? 5000 steps are unusual.
Pls post a report.
Uwe
What kind of steppers? 5000 steps are unusual.
Pls post a report.
Uwe
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tblough
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Re: Lathe calibration problem
And a 5.5mm pitch ballscrew is also suspect, as would be a 5.6TPI ballscrew.
Cheers,
Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.
Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.
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suntravel
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Re: Lathe calibration problem
25/6.25=4mm pitch
Uwe
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tblough
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Re: Lathe calibration problem
You are correct Uwe. I must be getting senile.
Cheers,
Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.
Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.
(Note: Liking will "up vote" a post in the search results helping others find good information faster)