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Wilson II Print Bed for Prusa i3 plate

by TechMav, published

Wilson II Print Bed for Prusa i3 plate by TechMav Feb 25, 2016
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Summary

This is a remix of the Y-Axis print bed table to allow use of the Prusa i3 200mmx300mm table without having to redrill anything. You will need to cut the rear of the plate for clearance of the motor and limit switch. The Bridge is a VERY tight fit, to keep it from shifting.

FYI, the fan you can see in the picture is to cool the Y-Axis motor.

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Ok - so if I want to use a 200 x 200 bed - I can just cut it off?

I am surprised at the use of a fan here.

It's gotten to be habit to put fans on all the motors for me. I've had problems with them getting hot enough to almost burn me, and skipping steps when they get over-hot. At this point, I'm tempted to revamp MRice's Wilson II design and set it up with fans built into the frame pieces for Z-Axis and Y-Axis motors.

Can you please upload the files for your current fan mount design for the Wilson II?

Uploaded the fan mount to this Thing.

Dang. It sounds like you are using way too much current for them and/or possibly over tight belts etc... as those things are the only reasons for a motor running hot. Only other case is the motor is too small for the chore it is trying to do (like using a Nema 14 instead of a Nema 17 or 48oz where a 70oz is needed, etc...). My motors never get hot enough to need fans on them even the extruder motor never gets hot enough to need a fan once I dialed it in properly on the ramps and in Marlin (the most worked motor is E)

I'm running NEMA 17's on the printer.

What ounce? The normal 70oz? If you are then you are left with two reasons you are running so hot because there is excessive drag on the motors (not true, or belts way too tight) that is demanding you pump the current up too high or you have done so by mistake. If you are on a ramps try for the lowest setting on the trim pots right before it skips. If your motors, and frame, and everything else is fine you shouldn't need more than 600ma (even that is pushing it) per motor. Could be just crappy motors too as I use Kysan motors.

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