# How to Manually adjust Z-Axis to raise the router bit? **URL:** \ **Category:** Troubleshooting\ **Created:** [August 25, 2019, 11:10am UTC](https://forums.maslowcnc.com/t/how-to-manually-adjust-z-axis-to-raise-the-router-bit/10956 "2019-08-25T11:10:38Z")\ **Posts on this page:** 1\ **Showing post:** 15
**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 3, 2019, 6:03pm UTC](https://forums.maslowcnc.com/t/how-to-manually-adjust-z-axis-to-raise-the-router-bit/10956/15 "2019-09-03T18:03:06Z")
A little more info… when you press ‘define zero’ on the z-axis page, it sends a command (G10 Z0) to tell the controller the z-axis is at 0. Then it sends a G00 Z.25, if in imperial units, or G00 Z5, if in metric. I haven’t seen an error cause by the z-axis not keeping up before and not sure it’s monitored. So, I suspect it’s a sled issue and even though the sled isn’t moving, the check is probably still happening. I think the problem might occur when you ran the test motors/encoders. I suggest resetting the chain lengths and trying again. Did you mark your chains when you fed them out initially? > [@How To: Manually Reset Chains, the Easy Way](https://forums.maslowcnc.com/t/how-to-manually-reset-chains-the-easy-way/9702): > > Every now and then you may find that you need to readjust the chains back to a known position. This could occur if you power/connection issue and the controller lost it’s position, had a chain skip, took apart something for some reason, etc… Fortunately, there’s a way to reset the chains without a lot of work. During calibration, after you set the sprockets vertical, you extend the chains out to reconnect to the sled. If your “Extend Chain Distance” is a multiple of a full revolution of the s… --- _[View the full topic](https://forums.maslowcnc.com/t/how-to-manually-adjust-z-axis-to-raise-the-router-bit/10956)._