# Z axis & Motor Calibration

**URL:** <https://forums.maslowcnc.com/t/z-axis-motor-calibration/3999>\
**Category:** Troubleshooting\
**Tags:** groundcontrol\
**Created:** [May 20, 2018, 5:31am UTC](https://forums.maslowcnc.com/t/z-axis-motor-calibration/3999 "2018-05-20T05:31:08Z")\
**Posts on this page:** 1\
**Page:** 2

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**Author:** ![loucksg](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/loucksg/32/5446_2.png) [@loucksg](https://forums.maslowcnc.com/u/loucksg)\
**Post date:** [June 11, 2018, 3:35am UTC](https://forums.maslowcnc.com/t/z-axis-motor-calibration/3999/21 "2018-06-11T03:35:54Z")

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Hi David,

I presume your treating this as a trig analysis, remember this is a cable, so like the letter ‘Y’, with g pulling straight down on the sled, your vectors will need to be adjusted by the Cos (Theta) of the angle, no?

I’ve not fully crawled through the spreadsheet just a quick look at some of the columns. It won’t purely behave as a pulley, however reasonably close enough for a model due to the cog/sprocket. I’ve also based this on the sled being perpendicular to the ground, and no black holes nearby, or large mountains ;-)!

The spreadsheet looks great, just got my sled cutting, so a few more calibration cuts and the fun begins.

Guy

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