Help with Motor Movement

[Mrclaybo]

I'm having issues with up movement. I uses a micrometer to set the steps per mm. when it travels down it moves within .001 of 10mm if I tell it 10mm. but if I start low and say move up 10 mm it moved 9.79. I've tested this several times. I can even tell it when I check bed level. If I run it down in any point and I'm .1 away from 0 and I put paper under I can barely tell there is paper so I press down .1 and I feel light pressure now. but if I say go back up.1. the amount of pressure on the paper is more than what was on there originally.

[Polygonhell]

I'm having issues with up movement. I uses a micrometer to set the steps per mm. when it travels down it moves within .001 of 10mm if I tell it 10mm. but if I start low and say move up 10 mm it moved 9.79. I've tested this several times. I can even tell it when I check bed level. If I run it down in any point and I'm .1 away from 0 and I put paper under I can barely tell there is paper so I press down .1 and I feel light pressure now. but if I say go back up.1. the amount of pressure on the paper is more than what was on there originally.

Don't trust the jog controls or the readouts in the host they accumulate errors.
Use G1 to move to specific locations and verify actual position with M114

[Eaglezsoar]

I'm having issues with up movement. I uses a micrometer to set the steps per mm. when it travels down it moves within .001 of 10mm if I tell it 10mm. but if I start low and say move up 10 mm it moved 9.79. I've tested this several times. I can even tell it when I check bed level. If I run it down in any point and I'm .1 away from 0 and I put paper under I can barely tell there is paper so I press down .1 and I feel light pressure now. but if I say go back up.1. the amount of pressure on the paper is more than what was on there originally.

Don't trust the jog controls or the readouts in the host they accumulate errors.
Use G1 to move to specific locations and verify actual position with M114

Polygonhell, I have done as you indicated before and got what I thought were all the valid G and M codes for Repetier but M114 was not part of my list.
There has got to be a place that has the proper and ALL the G and M codes for Repetier. I went to https://github.com/repetier/Repetier-Fi ... ki/G-codes
and it has listed M114 but not M119. Is there any place that lists all the codes for Repetier or do I have to find them in bits and pieces all over the web? You
seem to have them all memorized but that doesn't help me.

[Polygonhell]

I'm having issues with up movement. I uses a micrometer to set the steps per mm. when it travels down it moves within .001 of 10mm if I tell it 10mm. but if I start low and say move up 10 mm it moved 9.79. I've tested this several times. I can even tell it when I check bed level. If I run it down in any point and I'm .1 away from 0 and I put paper under I can barely tell there is paper so I press down .1 and I feel light pressure now. but if I say go back up.1. the amount of pressure on the paper is more than what was on there originally.

Don't trust the jog controls or the readouts in the host they accumulate errors.
Use G1 to move to specific locations and verify actual position with M114

Polygonhell, I have done as you indicated before and got what I thought were all the valid G and M codes for Repetier but M114 was not part of my list.
There has got to be a place that has the proper and ALL the G and M codes for Repetier. I went to https://github.com/repetier/Repetier-Fi ... ki/G-codes
and it has listed M114 but not M119. Is there any place that lists all the codes for Repetier or do I have to find them in bits and pieces all over the web? You
seem to have them all memorized but that doesn't help me.

This is a good starting point, but it's not complete.
http://reprap.org/wiki/G-code

[Mrclaybo]

Polygonhell I used the command line and not the arrows but get the same results.
g28
g1 z178 f1200
(set my micrometer to 0.00)
g1 z158
( results are 20mm to 20.01 flashing back and forth)
g1 z178 f1200
( results .32 to 31 flashing back and forth. )

Help.....