Possible problems in setup/configuration about grbl HOT 4 CLOSED

Are you running at very high feed rates? Do you get the same result at
lower feed rates?

On Sun, Jun 5, 2011 at 7:33 PM, dirktheeng
[email protected]
wrote:

I am running 12.5mm pulleys on my system (with the belt, the actual diameter could be slightly larger) with steppers that are 200 steps/rev set to 16x microstepping through the driver.  This means that the circumferance is about 39.2mm and there are 3200 steps per rev.  This means that my steps per mm should be very close to 81.5.  However when I went to calibrate the axis, the actual distance traveled with a g1x100 command is 51.66mm.  This means that my equivalent diameter is 6.457mm and that there are actually 157.737 steps/mm.  I am curious as to why this would be so far off (infact almost a factor of 2).  I mean, it doesn't really matter because with the right constant in there, it gives 100mm movement for a g1x100 command, but it is still a bit confusing.

Reply to this email directly or view it on GitHub:
https://github.com/simen/grbl/issues/22

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the results are the same regardles of feed rates. I get to exactly the same position, it's just off by a factor of two.

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Forget this issue. I just found out that the motors are 0.9 degree rather than 1.8 degree... some confusion from the data sheet.

from grbl.

ah, great. Thanks for reporting!

On Wed, Jun 15, 2011 at 1:26 AM, dirktheeng
[email protected]
wrote:

Forget this issue.  I just found out that the motors are 0.9 degree rather than 1.8 degree... some confusion from the data sheet.

Reply to this email directly or view it on GitHub:
https://github.com/simen/grbl/issues/22#issuecomment-1370058

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