# Z-axis -- BLTouch issues
**URL:** https://forum.lulzbot.com/t/z-axis-bltouch-issues/28047
**Category:** LulzBot Mini
**Created:** [August 13, 2026, 8:56pm UTC](https://forum.lulzbot.com/t/z-axis-bltouch-issues/28047 "2026-08-13T20:56:59Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@mvmacpu](https://forum.lulzbot.com/u/mvmacpu)
#### Post date: [August 13, 2026, 8:56pm UTC](https://forum.lulzbot.com/t/z-axis-bltouch-issues/28047/1 "2026-08-13T20:56:59Z")
I have Mini 3 and after replacing the BLTouch the head doesn’t move close enough to printer bed for the BLTouch to make contact.
Is there now something wrong with my geometry settings and it believes it bed should be closer than it is?
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### Author:  [@mvmacpu](https://forum.lulzbot.com/u/mvmacpu)
#### Post date: [September 4, 2026, 9:37pm UTC](https://forum.lulzbot.com/t/z-axis-bltouch-issues/28047/2 "2026-09-04T21:37:23Z")
Is there anyway to have the printing head come closer to the bed? I’ve modified the Z-axis settings but it won’t let me get below -4xxx. It’s as if the fundamental geometry changed when we swapped in the new BLTouch.
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### Author:  [@Wrathernaut](https://forum.lulzbot.com/u/Wrathernaut)
#### Post date: [September 5, 2026, 12:07am UTC](https://forum.lulzbot.com/t/z-axis-bltouch-issues/28047/3 "2026-09-05T00:07:33Z")
Remove and check that the toolhead is seated properly. I don’t see a way to mount the BLTouch wrong, but if the toolhead didn’t seat right, that could cause an issue.
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### Author:  [@cdsmith](https://forum.lulzbot.com/u/cdsmith)
#### Post date: [September 9, 2026, 3:11am UTC](https://forum.lulzbot.com/t/z-axis-bltouch-issues/28047/4 "2026-09-09T03:11:07Z")
There’s a macro that you can run that will reset the calibrated Z height.
Look in the Mainsail Dashboard, in the Macros or Action Buttons panel, for a macro that says “RESET Z ENDSTOP” and click it. Or on the KlipperScreen touch screen tap the macros icon on the action bar on the side of the screen, scroll down until you find “RESET Z ENDSTOP” and tap the play button to the right.
This should make it set the z height back to the factory value of 186 mm.
You’ll then have to recalibrate the Z endstop position. Easiest way to do that is to go back to the main menu on the touchscreen, go to More, then to Z-Calibrate, select Endstop in the drop down menu, and follow the instructions. You’ll have to do the classic “slide the paper under the nozzle” calibration procedure.
Actually, it might be better to calibrate the probe first, then go back into the z-calibrate and do the endstop calibration.
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### Author:  [@mvmacpu](https://forum.lulzbot.com/u/mvmacpu)
#### Post date: [September 24, 2026, 8:51pm UTC](https://forum.lulzbot.com/t/z-axis-bltouch-issues/28047/5 "2026-09-24T20:51:02Z")
thank you all for the replies. Unfortunately, I let my son take a look at it and he decided to it needed package updates. Now it doesn’t even communicate with the tool head.
The Mini 3 uses SocketCAN, but when I query using the following
`~/klippy-env/bin/python ~/klipper/scripts/canbus_query.py can0`
I see:
`Total 0 uuids found`
The connection is up:
`ip -details -statistics link show can0`
shows:
`3: can0: mtu 16 qdisc pfifo_fast state UP mode DEFAULT group default qlen 128`
`link/can promiscuity 0 minmtu 0 maxmtu 0`
`can state ERROR-ACTIVE restart-ms 0`
`....`
`RX: bytes packets errors dropped missed mcast`
`56137726 7673887 0 0 0 0`
`TX: bytes packets errors dropped carrier collsns`
`2961096 493633 0 0 0 0`
Is there an easy way to refresh the toolhead without refreshing the Manta board?