# Taz 4/5 has issues with Z Home

**URL:** <https://forum.lulzbot.com/t/taz-4-5-has-issues-with-z-home/4386>\
**Category:** LulzBot TAZ\
**Created:** [January 2, 2017, 12:38am UTC](https://forum.lulzbot.com/t/taz-4-5-has-issues-with-z-home/4386 "2017-01-02T00:38:12Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Driften](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/driften/32/9184_2.png) [@Driften](https://forum.lulzbot.com/u/Driften)\
**Post date:** [January 2, 2017, 12:38am UTC](https://forum.lulzbot.com/t/taz-4-5-has-issues-with-z-home/4386/1 "2017-01-02T00:38:12Z")

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My Taz 4 (upgraded to 5) has problems with homing Z. When I tell it to home Z it makes a loud noise for about 60seconds and then moves. If I move the Z my giving commands for going up or down what ever amount I want everything is fine no noise immediate smooth movement, but hit home for Z and I get the problem again. It acts like its trying to turn the Z steppers but its not getting enough torque.

It seems like if it was the controller or stepper motor it should have an issue with the Z movement commands also. I have reloaded the failsafe firmware with no difference.

FIRMWARE\_NAME:Marlin V1.0.0.1; Standard V2.0 FIRMWARE\_URL:[https://code.alephobjects.com/diffusion/MARLIN/](https://code.alephobjects.com/diffusion/MARLIN/) PROTOCOL\_VERSION:1.0

My M503 shows  
Send: M503  
Recv: echo:Steps per unit:  
Recv: echo: M92 X100.50 Y100.50 Z1600.00 E833.00 E1800.00  
Recv: echo:Maximum feedrates (mm/s):  
Recv: echo: M203 X800.00 Y800.00 Z8.00 E40.00  
Recv: echo:Maximum Acceleration (mm/s2):  
Recv: echo: M201 X9000 Y9000 Z100 E10000  
Recv: echo:Acceleration: S=acceleration, T=retract acceleration  
Recv: echo: M204 S500.00 T3000.00  
Recv: echo:Advanced variables: S=Min feedrate (mm/s), T=Min travel feedrate (mm/s), B=minimum segment time (ms), X=maximum XY jerk (mm/s), Z=maximum Z jerk (mm/s), E=maximum E jerk (mm/s)  
Recv: echo: M205 S0.00 T0.00 B20000 X8.00 Z0.40 E10.00  
Recv: echo:Home offset (mm):  
Recv: echo: M206 X0.00 Y0.00 Z0.00  
Recv: echo:PID settings:  
Recv: echo: M301 P16.91 I1.13 D63.45

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<div class="post-metadata">

**Author:** ![Driften](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/driften/32/9184_2.png) [@Driften](https://forum.lulzbot.com/u/Driften)\
**Post date:** [January 3, 2017, 9:51pm UTC](https://forum.lulzbot.com/t/taz-4-5-has-issues-with-z-home/4386/2 "2017-01-03T21:51:01Z")

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After a lot of help with the lulzbot support guys here is the fix.

The Z Max speed limit had reset to 8 when I had powered the printer off. When set to 7 or less the problem is gone. I normally have in my print start scrips in all the slicers is M203 X192 Y208 Z3 which would have set the limit to 3. If I had not needed to re-zero my Z from changing the nozzle I would never had see the issues since it would have been set back to sane settings with the first print.