1 Topic by ITman496

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Topic: heated chamber printer design project, maybe eventually a build?

So I got bored and decided that I wanted to make the best printer I could.  I don't have the money to do it right now so for now this is just a design.  And its not finished yet.

My goal is to have an interior chamber temp of 75C since I believe that's the ideal for abs?  Two hot ends to run support material.. decent build bed, anything over 10x10x10 is fine and right now it appears to be 13x12x10ish which can be messed with later. All of the parts will be machined on my soon to be existing cnc machine.

Due to the high temperatures, I've decided to go a bit crazy with the water cooling.  It might not be necessary, but it's really cool so I don't care.

https://dl.dropboxusercontent.com/u/4963246/newawesomeprinter/framewip2.jpg

https://dl.dropboxusercontent.com/u/4963246/newawesomeprinter/springloadedstuff.jpg

https://dl.dropboxusercontent.com/u/4963246/newawesomeprinter/extruderhead1.jpg

https://dl.dropboxusercontent.com/u/4963246/newawesomeprinter/waterchannel.jpg

https://dl.dropboxusercontent.com/u/4963246/newawesomeprinter/morewatercooling.jpg

I'll post more as I make it.  smile

2 Reply by Stevos758 (edited by Stevos758 2014-09-26 13:27:23)

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Re: heated chamber printer design project, maybe eventually a build?

Sweet! I love this stuff!

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3 Reply by DePartedPrinter

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Re: heated chamber printer design project, maybe eventually a build?

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.

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4 Reply by ITman496

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Re: heated chamber printer design project, maybe eventually a build?

okay, so I was around the ballpark.

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.

https://dl.dropboxusercontent.com/u/4963246/newawesomeprinter/coolinghoseswip.jpg

5 Reply by elmoret

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Re: heated chamber printer design project, maybe eventually a build?

DePartedPrinter wrote:
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.

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6 Reply by ITman496

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Re: heated chamber printer design project, maybe eventually a build?

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.

7 Reply by IanJohnson

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Re: heated chamber printer design project, maybe eventually a build?

With dual extruders, you will want a way to level them individually.  Even if the mounts are in the same block, after the other parts have been screwed together you might end up with one nozzle a fraction of a millimeter lower than the other.  Maybe the hotends can mount into a single block that can pivot somewhere.  Get the bed level to the gantry based on a dial indicator attached to the carriage.  Then loosen the mounting block, drop the nozzles until they both rest on the bed, then tighten the block.

8 Reply by ITman496 (edited by ITman496 2014-09-26 19:08:21)

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Re: heated chamber printer design project, maybe eventually a build?

Hm, that's a good point actually..

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.

https://dl.dropboxusercontent.com/u/4963246/newawesomeprinter/extruderleveling.jpg

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!

9 Reply by elmoret

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Re: heated chamber printer design project, maybe eventually a build?

ITman496 wrote:

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!

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10 Reply by ITman496

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Re: heated chamber printer design project, maybe eventually a build?

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.

11 Reply by ITman496

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Re: heated chamber printer design project, maybe eventually a build?

Okay, finished the tubing and water distribution blocks!  Somewhat.  I think.

https://dl.dropboxusercontent.com/u/4963246/newawesomeprinter/finishedtubingsorta.jpg

12 Reply by ITman496

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Re: heated chamber printer design project, maybe eventually a build?

And now it even has a snazzy cover!

https://dl.dropboxusercontent.com/u/4963246/newawesomeprinter/withoutcover.jpg

https://dl.dropboxusercontent.com/u/4963246/newawesomeprinter/withcover.jpg

13 Reply by elmoret

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Re: heated chamber printer design project, maybe eventually a build?

ITman496 wrote:

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.

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14 Reply by ITman496

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Re: heated chamber printer design project, maybe eventually a build?

Hm, thats true actually.  Oh well, if the solidoodle x-axis motor can run as hot as it does stock and not have a problem then I could probably use coolant that's the temperature of the core of the sun and be fine.  I'll definitely keep an eye on it though.

15 Reply by grob

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Re: heated chamber printer design project, maybe eventually a build?

That carriage is going to weigh a tonne... Hope you've got beefy motors and drivers to run it around at a hair-raising speed!! Watercooling is such an ace idea though. Wanted to try it on a laser cutter to squeeze a bit more current out of some motors (as it already has a cooling circuit for the laser) but seemed like a lot of effort! smile

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16 Reply by ITman496

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Re: heated chamber printer design project, maybe eventually a build?

I was thinking of using nema 23's or something.  Or maybe 24V instead of 12V..

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