Used my FLIR One to take some photos. Interest of note is the temperature gradient on the heated bed, as well as the heat of the X-Axis linear actuator.
It is noticeably warmer than the others but I attribute it to just working more often.
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I have the same here, x-axis is about 8°C above the y or z
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Heat in the snapmaker enclosure can be a good thing and perhaps essential for 3D printing some filaments like ABS but it is not a good thing for the stepper motors that drive the linear actuators. As the temperature increases the magnetic force available to the stepper motors is reduced. This decreases the available motor torque and will eventually be expressed in skipped steps and failed prints.
What about adding liquid cooling to a linear actuator?
In this approach a section of an internal galley in the linear actuator’s aluminum extrusion would be sealed and tapped at each end of the sealed section. Using a bit of flexible plumbing this sealed section is connected to an external to the cabinet coolant circulation pump, heat exchanger and fluid reservoir. This circulated fluid would cool the aluminum extrusion which would pull the heat off the stepper motor without reducing the temperature of the enclosure.