Right now my biggest hurdle is the z-probe.  Trying to figure out a graceful and elegant way to make it fit..

Honestly you'd be surprised how effective that is.  The motors on my boat can easily put out a kw of power and just four turns of brass tubing touching the casing is enough to make them not even warm.  I think a stepper should hopefully not make as much heat.  I could be wrong though!  I plan on wiring many temperature sensors all over the printer to keep track of everything.  And so I have an excuse to have a cool cluster of status gauges.

The trouble is you're not having to fight ambients as well in the boat application. You need to cool the stepper case below enclosure temps, so things are a bit different here.

Not saying it won't work, just something to be mindful of.

I know, thats why I've put watercooling on them, if I put the right pictures up..

Yeah the last picture of my first post, you can see the wiggly brass tube going around the stepper body.  That's 1/8" OD brass tubing, and then it will be thermal epoxy'd into the motor body or something.  I've done the same trick to cool my RC boat motors.

I'm not sure if that will move enough heat, but worth a shot!

I know what I'll do, I'll just split the block holding the nozzles into two pieces so I can crank each one up and down individually.

And then just shim them somehow or put something semisquishy but not so squishy between the blocks to act like a spring with a little give, I dunno yet.

EDIT: Or maybe I could mill pockets into both sides and fit actual small but powerful springs in to tension the block outwards against its screws... So many ideas.  Thank you for suggesting this, it would have bit me in the butt if I didn't realize it sooner!

Yeah the last picture of my first post, you can see the wiggly brass tube going around the stepper body.  That's 1/8" OD brass tubing, and then it will be thermal epoxy'd into the motor body or something.  I've done the same trick to cool my RC boat motors.

ITman496 wrote:

My goal is to have an interior chamber temp of 75C since I believe that's the ideal for abs?

70C will be sufficient to prevent warp.

70C ambients will also cook OTS steppers, especially without active cooling.

Here is a question for everyone, do normal pc cooling fans work at all at 70C-75C or do you know where I can get extra special high ambient temperature fans?  I want to stir the air inside the chamber.

And thanks Stevos!  Have another wip.

My goal is to have an interior chamber temp of 75C since I believe that's the ideal for abs?

70C will be sufficient to prevent warp.