# Encoder steps.. Issue with returning sprocket to 12 o'clock after precise number of links fed out... again

**URL:** <https://forums.maslowcnc.com/t/encoder-steps-issue-with-returning-sprocket-to-12-oclock-after-precise-number-of-links-fed-out-again/6578>\
**Category:** Troubleshooting\
**Created:** [September 10, 2018, 12:19am UTC](https://forums.maslowcnc.com/t/encoder-steps-issue-with-returning-sprocket-to-12-oclock-after-precise-number-of-links-fed-out-again/6578 "2018-09-10T00:19:54Z")\
**Posts on this page:** 1\
**Showing post:** 17

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**Author:** ![madgrizzle](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/madgrizzle/32/1372_2.png) [@madgrizzle](https://forums.maslowcnc.com/u/madgrizzle)\
**Post date:** [September 10, 2018, 11:39pm UTC](https://forums.maslowcnc.com/t/encoder-steps-issue-with-returning-sprocket-to-12-oclock-after-precise-number-of-links-fed-out-again/6578/17 "2018-09-10T23:39:52Z")

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Here’s the logs. First I did an set zero on the sprockets (I had already did auto adjustment to 12 o’clock), followed by an adjust left chain. The brackets variables indicate the print statements I added to report the variables of singleAxisMove.

Sent: B06 L0 R0  
B06 L0 R0  
Setting Chain Lengths To:  
Left: 0.00mm  
Right: 0.00mm  
ok  
Sent: B02 L1 R0  
B02 L1 R0  
Measuring out left chain  
2032.00mm [endPos]  
800.00mm [MMPerMin]  
2032.00mm [moveDist]  
15239steps [finalNumberOfSteps]  
0.13mmpermin [stepSizeMM]  
2030.67mm [value reported from axis.read at end of calibrate chain lengths]

Then I did another automatic and set zero. The error from 12 o’clock was 1.17 mm

Sent: B10 L  
B10 L  
ok  
Sent: B10 R  
B10 R  
ok  
Sent: G91  
G91  
ok  
Sent: B09 L-1.17  
B09 L-1.17

2032.00mm [endPos]  
800.00mm [MMPerMin]  
-1.17mm [moveDist]  
8steps [finalNumberOfSteps]  
-0.13mmpermin [stepsizeMM]  
ok  
Sent: B09 R-0.0  
B09 R-0.0  
ok  
Sent: G90  
G90

Sent: B06 L0 R0  
B06 L0 R0  
Setting Chain Lengths To:  
Left: 0.00mm  
Right: 0.00mm  
ok  
Message: Notice: Exiting the calibration process early may result in incorrect calibration.Sent: ~  
ok

finally, sent a B09 L2032:

Sent: B09 L2032  
B09 L2032  
2032.00mm [endPos]  
800.00mm [MMPerMin]  
2031.94mm [moveDist]  
15239steps [finalNumberOfSteps]  
0.13mmpermin [stepSizeMM]

this time, there error was only 0.01 mm

If there isn’t any rounding going on with how the variables are being reported to the log, it makes no sense for the same values to provide differing results.

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