# Top Center is not the place to be

**URL:** <https://forums.maslowcnc.com/t/top-center-is-not-the-place-to-be/4380>\
**Category:** Troubleshooting\
**Created:** [June 15, 2018, 3:14pm UTC](https://forums.maslowcnc.com/t/top-center-is-not-the-place-to-be/4380 "2018-06-15T15:14:02Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![VTWood](https://avatars.discourse-cdn.com/v4/letter/v/c0e974/32.png) [@VTWood](https://forums.maslowcnc.com/u/VTWood)\
**Post date:** [June 15, 2018, 3:14pm UTC](https://forums.maslowcnc.com/t/top-center-is-not-the-place-to-be/4380/1 "2018-06-15T15:14:02Z")

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Hi all, looking for some help.

I was cutting out a set of parts and trying to use the full sheet of plywood height. As I was cutting along the top edge, when the sled got to the center, I got the ‘sled is not keeping up with expected position’, then (I’m paraphrasing) ‘known lengths of chains is missing’.

Of course, this is at the end of a 3 day run on the panel.

I do have the old quadrilateral sled on this. My question is - is this a one time thing, or will this continue to happen? I’m working on upgrading the sled, but was hoping to finish this project with the current one.

Thanks!

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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:** [June 15, 2018, 3:24pm UTC](https://forums.maslowcnc.com/t/top-center-is-not-the-place-to-be/4380/2 "2018-06-15T15:24:30Z")

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It seems that most of the time the error occurs, it is because the sled is a the top of the frame. To me, this points to a power supply issue (or issue with the ability to supply power). I suspect that either the power supply cannot provide the necessary current (some people have upgraded their power supply. click [here](https://forums.maslowcnc.com/t/straight-line-curves-down-at-top-of-the-sheet-solved/2419/96)) or, if the motor controller is hot, it might be more susceptible to not being able to provide the necessary power. There’s some commmunity-based work on a new motor controller board that might help the problem (click [here](https://forums.maslowcnc.com/t/tle5206-powercontrol-boards/3245)).

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**Author:** ![bar](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/bar/32/10_2.png) [@bar](https://forums.maslowcnc.com/u/bar)\
**Post date:** [June 15, 2018, 4:21pm UTC](https://forums.maslowcnc.com/t/top-center-is-not-the-place-to-be/4380/3 "2018-06-15T16:21:17Z")

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The original sled puts a lot more tension on the chains at the top of the sheet than the newer designs which allow the chains to rotate down to the sides of the router.

As a short term work around I would recommend trying to cut slower. Like @madgrizzle said the issue is that the motors are working really hard at the top of the sheet there, and slowing them down a little will make it easier on them