# Tried to fix z stop and had to tell it to go below what it thought was bottom z home and it freaked out and wants me to reset belts why? **URL:** \ **Category:** Troubleshooting\ **Created:** [August 17, 2026, 8:12am UTC](https://forums.maslowcnc.com/t/tried-to-fix-z-stop-and-had-to-tell-it-to-go-below-what-it-thought-was-bottom-z-home-and-it-freaked-out-and-wants-me-to-reset-belts-why/26119 "2026-08-17T08:12:34Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Caleb\_Yager](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/caleb_yager/32/25070_2.png) [@Caleb\_Yager](https://forums.maslowcnc.com/u/Caleb_Yager)\ **Post date:** [August 17, 2026, 8:12am UTC](https://forums.maslowcnc.com/t/tried-to-fix-z-stop-and-had-to-tell-it-to-go-below-what-it-thought-was-bottom-z-home-and-it-freaked-out-and-wants-me-to-reset-belts-why/26119/1 "2026-08-17T08:12:34Z")
[Maslow-serial (44).log](https://forums.maslowcnc.com/uploads/short-url/6XUuJxbaQQp9m7Az2oK3LFwPxG9.log) (4.0 KB) ---
**Author:** ![Caleb\_Yager](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/caleb_yager/32/25070_2.png) [@Caleb\_Yager](https://forums.maslowcnc.com/u/Caleb_Yager)\ **Post date:** [August 17, 2026, 8:14am UTC](https://forums.maslowcnc.com/t/tried-to-fix-z-stop-and-had-to-tell-it-to-go-below-what-it-thought-was-bottom-z-home-and-it-freaked-out-and-wants-me-to-reset-belts-why/26119/2 "2026-08-17T08:14:30Z")
i cant get it to move up or down even after restart, im gonna have to keep it propped up i guess and retract and re extend the belts and see if that fixes it ---
**Author:** ![ian\_ab](https://avatars.discourse-cdn.com/v4/letter/i/a587f6/32.png) [@ian\_ab](https://forums.maslowcnc.com/u/ian_ab)\ **Post date:** [August 17, 2026, 9:59am UTC](https://forums.maslowcnc.com/t/tried-to-fix-z-stop-and-had-to-tell-it-to-go-below-what-it-thought-was-bottom-z-home-and-it-freaked-out-and-wants-me-to-reset-belts-why/26119/3 "2026-08-17T09:59:23Z")
From your Serial Log Release Tension [MSG:INFO: Requesting state change from Ready To Cut to Releasing Tension] [MSG:INFO: TL: 1994.755 TR: 1999.382 BL: 1992.543 BR: 2003.644] [MSG:INFO: Succeeded] **Here you had “Ready To Cut”** JogTo: $J=G91G20F98.43Y-12 (inch) **Was the Jog successful?** [MSG:INFO: Succeeded] [MSG:INFO: Zm=39.150mm, Z home=35.970mm, Z position=3.180mm] **Here the Maslow thinks the Z access is 3.18 above Maslow Home** [MSG:INFO: Requesting state change from Releasing Tension to Belts Extended] [MSG:INFO: Succeeded] JogTo: $J=G91G21F300Z-10.01 (mm) **Sent it down 10.01mm to 29.140** JogTo: $J=G91G21F300Z-10.01 (mm) **Sent it down 10.01mm to 19.13** JogTo: $J=G91G21F300Z-10.01 (mm) **Sent it down 10.01mm to 9.12** JogTo: $J=G91G21F300Z-10.01 (mm) **Sent it down 10.01mm to -0.89, This should have asked are you sure?** JogTo: $J=G91G21F300Z-10.01 (mm) **Sent it down 10.01mm to -10.9, This should have asked are you sure?** The last two jogs have lowered the Z axis as far as it will go, but the Maslow maths thinks it is at -10.9. Therefore the belts will not be accurately reflecting the real world. If you bottom out you have to reset the Zm to zero (setup, config., Set Z axis) before trying to move. So now its lost, the only alternative is a retract, extend sequence, but before that reset the Z axis to Zero. Maslow is not ready to move. Could not perform Jog. Belt lengths are unknown. ---
**Author:** ![Caleb\_Yager](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/caleb_yager/32/25070_2.png) [@Caleb\_Yager](https://forums.maslowcnc.com/u/Caleb_Yager)\ **Post date:** [August 17, 2026, 12:00pm UTC](https://forums.maslowcnc.com/t/tried-to-fix-z-stop-and-had-to-tell-it-to-go-below-what-it-thought-was-bottom-z-home-and-it-freaked-out-and-wants-me-to-reset-belts-why/26119/4 "2026-08-17T12:00:11Z")
i was trying to bottom it out to reset it ---
**Author:** ![ian\_ab](https://avatars.discourse-cdn.com/v4/letter/i/a587f6/32.png) [@ian\_ab](https://forums.maslowcnc.com/u/ian_ab)\ **Post date:** [August 17, 2026, 11:50pm UTC](https://forums.maslowcnc.com/t/tried-to-fix-z-stop-and-had-to-tell-it-to-go-below-what-it-thought-was-bottom-z-home-and-it-freaked-out-and-wants-me-to-reset-belts-why/26119/5 "2026-08-17T23:50:29Z")
Are you in inches mode? ---
**Author:** ![Caleb\_Yager](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/caleb_yager/32/25070_2.png) [@Caleb\_Yager](https://forums.maslowcnc.com/u/Caleb_Yager)\ **Post date:** [August 18, 2026, 9:14pm UTC](https://forums.maslowcnc.com/t/tried-to-fix-z-stop-and-had-to-tell-it-to-go-below-what-it-thought-was-bottom-z-home-and-it-freaked-out-and-wants-me-to-reset-belts-why/26119/6 "2026-08-18T21:14:11Z")
i may have been, i caught myself a little later after i fixed it in inches instead of mm when i was trying to lower it again so it is definitely possible and quite likely, i also just ended up letting it run the whole distance down it wanted to until it stopped so it could then be told a new z stop, i was quite tired when i was trying to mess with it so i imagine i just wasn’t paying attention to the right stuff most likely ---
**Author:** ![ian\_ab](https://avatars.discourse-cdn.com/v4/letter/i/a587f6/32.png) [@ian\_ab](https://forums.maslowcnc.com/u/ian_ab)\ **Post date:** [August 18, 2026, 9:18pm UTC](https://forums.maslowcnc.com/t/tried-to-fix-z-stop-and-had-to-tell-it-to-go-below-what-it-thought-was-bottom-z-home-and-it-freaked-out-and-wants-me-to-reset-belts-why/26119/7 "2026-08-18T21:18:43Z")
Have you got control of it now? It should not matter, but I have noticed an occasional overrun when in inches mode. ---
**Author:** ![Caleb\_Yager](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/caleb_yager/32/25070_2.png) [@Caleb\_Yager](https://forums.maslowcnc.com/u/Caleb_Yager)\ **Post date:** [August 19, 2026, 2:09am UTC](https://forums.maslowcnc.com/t/tried-to-fix-z-stop-and-had-to-tell-it-to-go-below-what-it-thought-was-bottom-z-home-and-it-freaked-out-and-wants-me-to-reset-belts-why/26119/8 "2026-08-19T02:09:28Z")
more or less, i will download those updates you sent and try again and see if it tries to top out again in my process of cutting some more stuff out