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Dual Extrusion - want it, need it, gotta have it!
Laser8302
Posts: 170Member, ๐ Super Member ๐
OK so I've had quite the learning curve with my personal A5. My ultimate goal is to do this:
https://www.aliexpress.com/item/32770576556.html?storeId=1654223&spm=2114.12010615.8148356.15.717b29354fovnl
This will be simpler to implement than a full 2 nozzle hot end, or redesigning the sled to take a different heat sink/mixing extruder system. All I need to do is add a 2nd extruder, motor and filament reel.
Any thoughts?ย
The only other option I think I would consider would be a "mixing" extruder like the cyclops:
https://www.aliexpress.com/item/32699836914.html?spm=a2g0o.detail.1000023.15.602d15e3bKo5gV
But again, my goal is less modification, not more. I'me sure I could make it mount to the front of the x-carriage or something if I wanted to. I'll keep everyone posted on what I end up with.
https://www.aliexpress.com/item/32770576556.html?storeId=1654223&spm=2114.12010615.8148356.15.717b29354fovnl
This will be simpler to implement than a full 2 nozzle hot end, or redesigning the sled to take a different heat sink/mixing extruder system. All I need to do is add a 2nd extruder, motor and filament reel.
Any thoughts?ย
The only other option I think I would consider would be a "mixing" extruder like the cyclops:
https://www.aliexpress.com/item/32699836914.html?spm=a2g0o.detail.1000023.15.602d15e3bKo5gV
But again, my goal is less modification, not more. I'me sure I could make it mount to the front of the x-carriage or something if I wanted to. I'll keep everyone posted on what I end up with.
Thanked by 1Samuel Pinches
Comments
Anyway, here's some pictures until I get it installed.
I also replaced the x carriage bearings, and the motor couplers with solid couplers instead of flex type.
Next up, y axis bearings, new heat bed, flex steel build plate and a SKR 1.3 board to run the dual extrusion.
I've got everything back together finally! I've been using TMC2208 drivers in standalone mode, and with the SKR in uart mode they are even quieter! Even my extruder got quieter on the A4988 for some reason...
I now need to work out the tool change g code. I want to "hammer forge" the filament before swapping it. I have decent dual drive gear extruders from trianglelab.
I was trying theย TOOLCHANGE_FILAMENT_SWAP firmware feature, but for some reason after the first swap all the extruders do is vibrate and then I have to stop the print and figure out what happened. I think I'll just use tool change scripts in the slicer.
Here's some pictures of what I've got set up.
Still trying to figure out what slicer handles the dual extruders best. CURA would be my go-to if it hasn't been so slow on my work PC to slice things and change extruders. It's so slow that sometimes I enable and disable the extruder on our ultimaker setup that CURA crashes...
Idea maker seems promising. It can group models quite well VS prusa slic3r where you have to position the models carefully.
Prusa slic3r doesn't give you as much control over the tool change as I would have hoped. Maybe they updated that since 2.1.0 maybe...
This is what I have for Start G-code (With BL touch and unified bed leveling)
This makes sure BOTH extruders are primed and ready to go.
Then there's the extruder switch code:
With this setup, I think I'm FINALLY ready to try my first dual-color print. Fingers crossed I can find more time this week or next week to try.
In order to increase the tool change speed, I went to 1/8 steps instead of 1/16 so that I could run the filament in and out faster. I just went to 1/2 of my E-steps to get to this, I guess I should re-calibrate.
I also needed to re-slice the model because I didn't do enough purge between colors. See below for my first attempt.
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