# How to set backlash in RDworks

**URL:** <https://forum.cloudray.com/t/how-to-set-backlash-in-rdworks/236>\
**Category:** Controller\
**Created:** [April 12, 2021, 2:52am UTC](https://forum.cloudray.com/t/how-to-set-backlash-in-rdworks/236 "2021-04-12T02:52:54Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Technician](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.cloudray.com/technician/32/15_2.png) [@Technician](https://forum.cloudray.com/u/Technician)\
**Post date:** [April 12, 2021, 2:52am UTC](https://forum.cloudray.com/t/how-to-set-backlash-in-rdworks/236/1 "2021-04-12T02:52:54Z")

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Scanning appears ghosting, adjust the backlash  
Draw a 60X60 box, and the scan interval should be 1 in the scan parameters. Adjust the light power and start scanning. Use a ruler to measure the scanned line, (left+right-), fill in the software setting of the measured number-check the scan (backlash) in the general settings, and add it in (the speed is different, the gap size is different, it depends on Actual setting).  
Note: Usually, the mechanical structure problems are ruled out first, such as the belt is too loose, the synchronous wheel is slipping; the motor drive power supply is not enough to lose steps; finally, the response speed of the laser tube or the power supply is considered.  
Example diagram of backlash:  
 ![image](https://us1.discourse-cdn.com/flex020/uploads/cloudray/original/1X/05fa97495b6e2bae310446dc08899c147a94f2fa.jpeg)  
Set engraving graphics and scanning gap, power and speed

 ![image](https://us1.discourse-cdn.com/flex020/uploads/cloudray/original/1X/a237932735c851f4398079bfaf7714e8c67c77f5.png)  
Add backlash of different speeds  
 ![image](https://us1.discourse-cdn.com/flex020/uploads/cloudray/original/1X/e977248f3f32a030d45077d0aa963cc17a1c5f83.png)  
The highlight is the backlash, which may be positive or negative. It is measured according to the actual situation and tested several times to offset the ghosting.