Z axis doesn't hold when power is off

Questions/answers/discussion about initial setup of your CNC Shark

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Re: Z axis doesn't hold when power is off

Postby sharkcutup » Tue Aug 06, 2019 7:05 pm

Even when I leave my 2 1/2" vacuum line attached it stays up after power cutoff.

Very Strange how others theirs does not stay up. Could it be age :lol: ??? :roll:

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Shark HD3 Pro Plus Extended Bed with Water-Cooled Spindle
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Re: Z axis doesn't hold when power is off

Postby gwoodworks » Tue Oct 22, 2019 10:00 pm

I have the same problem with my HD4
I have contacted Nextwave about the issue and they don't seem to be concerned, telling me much of the same, it's normall for the weight, put a piece of wood under it, get a battery backup, if they had safety in mind they might offer a Z axis power off stepper motor with a electromagnetic brake which I have asked them about and if they can't make one up can they give me the specs on the Z axis motor that is included with the HD4 still haven't got an answer, if anyone has the specs on this motor please post it, some say it's a Nema 23, Nema 23s only have four wires this has an extra white wire? Any help would be appreciated
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Re: Z axis doesn't hold when power is off

Postby gwoodworks » Tue Oct 22, 2019 10:05 pm

The reason some stay up and others don't is that the lead screw and the motor is not lined up, in other words it is in a bind, watch the bottom of the skrew as you operate the Z axis with the speed set to slow you will see that if it doesn't wobble your spindle will probably drop when power is cut, if it wobbles yours wont!
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Re: Z axis doesn't hold when power is off

Postby gwoodworks » Tue Oct 22, 2019 10:06 pm

"Screw "
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