Z-height and temperature

Topics around mechanical design, controller and electronics. Mods & hacks welcome.
HugeOne
Posts: 1
Joined: Thu Mar 09, 2017 1:48 pm

Z-height and temperature

Postby HugeOne » Wed Mar 15, 2017 2:04 pm

I noticed that the Z-home change a lot on my N2 from a cold to a warmed up machine. Probably around 0.2mm lower after warm up.
So far I modified the Gcode start so the machine heat the print bed for 15min before each print. It work, but I would prefer a faster solution, maybe a new Z-switch?

-Hugo

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walshlg
Posts: 1101
Joined: Wed Mar 23, 2016 12:01 pm

Re: Z-height and temperature

Postby walshlg » Wed Mar 15, 2017 2:38 pm

I always heat my print bed for 60 min before starting for this reason

Jetguy
Posts: 1143
Joined: Tue Mar 22, 2016 1:40 am

Re: Z-height and temperature

Postby Jetguy » Wed Mar 15, 2017 11:06 pm

The Z switch in and of itself is not temperature dependent. However, the mechanics being aluminum expand and contract, and coupled with different layers of materials that the Z stage and bed is made of, the shape can and does change. So you are seeing that change- not a result of the switch, but your bed changing, which is why it's that much more important to let everything stabilize when running higher temps and as such you level and set the z gap in the state you intend to print at.


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