# Counter weight on chain slack sprocket

**URL:** https://forums.maslowcnc.com/t/counter-weight-on-chain-slack-sprocket/1638
**Category:** Hardware
**Created:** [December 23, 2017, 3:40pm UTC](https://forums.maslowcnc.com/t/counter-weight-on-chain-slack-sprocket/1638 "2017-12-23T15:40:11Z")
**Posts on this page:** 1
**Showing post:** 4

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### Author: ![mrfugu](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/mrfugu/32/22_2.png) [@mrfugu](https://forums.maslowcnc.com/u/mrfugu)
#### Post date: [December 23, 2017, 5:24pm UTC](https://forums.maslowcnc.com/t/counter-weight-on-chain-slack-sprocket/1638/4 "2017-12-23T17:24:40Z")

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It might not be suitable based on your frame design, but I’ve been successful in preventing any chain jump using the kit-included materials by mounting the motors and chain guide in the manner seen in this link:

> [@UniStrut Frame designs](https://forums.maslowcnc.com/t/unistrut-frame-designs/1267/28):
>
> Some minor improvements and initial calibration. First, some shots of the perfectly good chain guides, using the included Delrin roller, trimmed ~1/4" to fit 1.5" screws. The screw is kept loose enough for the roller to spin freely. Note: This position (mounted directly to the motor face) places enough pressure to keep chain on at least 180deg of the sprocket, and keeps the exit chain aligned entering the sprocket. This is important because as you’ll see I have the l…

The ‘chain guide’ is just loose enough to allow the plastic (which i trimmed to length) to spin freely. The angle maintained by the chain to the sprocket is tight enough to force the chain onto the sprocket at no higher than 225 degrees (ie: SXSW, or ~7 o’clock). it acts like a chain tensioner andalignment guide immediately prior to the sprocket.

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