Watercooling, heated-chamber, high-temp-ready IDEX

titusou

So I have my first try on this thread:
https://forum.duet3d.com/topic/16244/watercooling-heat-chamber-tool-changer-high-temp-3dp-build

But I'm abandon tool-changer design as I found myself not able to trust the tool-changer to have it run un-attended. And the printed locking mechanism is another concern.

So, instead of spending time and effort to improve reliability of tool-changer, I decide to go back to dual-X Cartesian design.

I just finish the design stage and waiting for 30mm extrusion to arrive during the weekend, then I can start building the 2nd attempt.

dual x.png

Titus

whopping pochard

Very cool! Can't wait to see it come together!

titusou

Mechanical is most done now...

Y assembly (up side down)
2020-06-28 12.51.41 (s).jpg

Front view
2020-06-28 16.50.23 (s).jpg

Electronics and water cooling side cabine
2020-06-28 17.27.07 (s).jpg
Yes that's Misumi cardboard box as temp panel

And yes, this has 4 Z motors, as I figure it's easier/cheaper for me to get the same rigidity with 4 Z motors on each corner, than other 2 motors design which all require stiff Z frame for structure support.

I need to find a way to do Z calibration as I don't want to have BLtouch seat in the heat chamber. Maybe I will do a remove-able Z-probe bar to use flat top as reference point, we will see.

Until next time
Titus

A Former User

@titusou said in Watercooling, heat-chamber, high-temp 3DP build (2nd attempt):

Yes that's Misumi cardboard box as temp panel

CAD at its best. (Cardboard Aided Design)

fcwilt

@titusou said in Watercooling, heat-chamber, high-temp 3DP build (2nd attempt):

And yes, this has 4 Z motors, as I figure it's easier/cheaper for me to get the same rigidity with 4 Z motors on each corner, than other 2 motors design which all require stiff Z frame for structure support.

What are you going to use to as guides for the bed frame - rods or linear guides?

Thanks.

Frederick

titusou

@fcwilt said in Watercooling, heat-chamber, high-temp 3DP build (2nd attempt):

What are you going to use to as guides for the bed frame - rods or linear guides?

I have 2 linear rails on the left side vertical column to structure on X/Y direction holding, where Z is seating on 4 leadscrew motor.

Titus

fcwilt

@titusou said in Watercooling, heat-chamber, high-temp 3DP build (2nd attempt):

@fcwilt said in Watercooling, heat-chamber, high-temp 3DP build (2nd attempt):

What are you going to use to as guides for the bed frame - rods or linear guides?

I have 2 linear rails on the left side vertical column to structure on X/Y direction holding, where Z is seating on 4 leadscrew motor.

Titus

Ah.. Yes... I see them now. At first all I saw where the 4 lead screws.

Thanks.

Frederick

baird1fa

Can you use stall detection for the z probe? But I have a BLTouch in my heated chamber. I run it up to 70C and so far it’s fine.

titusou

@baird1fa said in Watercooling, heat-chamber, high-temp 3DP build (2nd attempt):

Can you use stall detection for the z probe? But I have a BLTouch in my heated chamber. I run it up to 70C and so far it’s fine.

I dont think stall detection work well with Z leadscrew...

titusou

I got all the wiring semi-done now. Need to redo X/U with drag chain to make it cleaner.

2020-07-13 22.56.23 (s).jpg

Cooling loop is using customized alum distribution block I'd from other projects, Probably oversized but it seems works. Yes it has 3 loops, one reserved for Y motor later. Haven't run the pump yet.

2020-07-13 22.55.58 (s).jpg

After lots of try&error I managed to get 4 independent Z motor running G32 auto bed calibration with "probe bar". It's working but quite hassle to use as I also need to put 50mm block during the probing.

2020-07-18 22.55.14 (s).jpg

Basically I use M291 message with input-response to control step flow. Moving XY to Z1 motor location > place probe bar + block > probe > remove probe bar + block > Z2 again > Z3 again > Z4 again. It take quite a while to finish.

2020-07-18 22.57.05 (s).jpg

I will see if using traditional gauge indicator will make G32 operation easier. Since bed is quite ridge I don't think I need to use G32 frequently.

And then... put BLTouch on X for G29 meshbed, maybe make BLTouch detachable to avoid long-term high-temp chamber exposure.

Until next time
Titus

titusou

Gauge indicator is super fast to use as Z frame leveling probe bar, then just use hand to rotate the Z motor leadscrew to make Z frame level on 4 corners.
2020-07-19 22.15.15 (s).jpg