3dverkstan Nerys Remix for making “The Stack”

OK I am working on making this critter more “stack” friendly. I think I got it pretty nicely dialed in.!! this is still prototype state folks! if you want to try this let it print 3 stop it and make sure it looks good and seps good on your machine.

Changes I made to the model. First the model has 3 bottom layers and then is a hollow frame and a bevel on the bottom.

Problem though. this meant a less than ideal surface on the TOP for the next airgapped model to print on. SO I made some changes. I made the whole model solid so you can “invert” the model with 3 top layers instead of 3 bottom layers. you can’t just rotate the model 180 because I NEED the bevel to stay on the bottom. this fixes that.

Print at 1.6 or 160% extrusion multiplier/flow rate. 2 perimeters 3 top layers 50% overlap infill at 85% EM/FR no infill (top and bottom layers are also infill to the slicer)

I have it modeled as a 35 stack with a 0.4mm gap between. slice at 0.2mm as this is evenly divisible into the 5mm height of the model (important to retain airgap integrity)

I needed to do this multi process in order to get a speed bump (otherwise its a 60hr print) BUT I need the “air gap interface” layer to be printed slowly. so multi process (HOURS in the slicer literally hours)

the GCODE and FACTORY are very very beta I am test printing right now some of my final changes.

another problem was inside curves not sticking. I solve this by putting notches in the first few layers of the mode like i do for complex vase mode printing. it seemed to work my last print was absolutely perfect i mean really perfect BUT I could not sep them easily. dolt. I forgot to turn ON the first layer fan for subsequent layers 2 upwards so the filament was too hot and sticky on the airgap. I and testing the solution now (fan on and lowered temp from 225 to 215) pure pla should print fine for this DO NOT use silks!!!

I also suspect PETG won’t play nice for this. but with 4 machines I can crank out 210 of these a day. with just 4 printers !!!

I was able to refine the slice down from 36 hours to 22 hours. nice! trying to keep it to 24hours of less so I only have to attend the machines once per day which is ideal. wake up process the machines start the next batch. Sadly food consumption is pretty high 450g per batch so 7 per 1kg roll of printer food.

not horrible but I was hoping for under 330g

remember this is NOT fully tested I am still refining it. it can require tweaks from machine to machine! mostly flow rate and speed (more and less)

I program mine to turn off the heat bed when it gets to part 3 but this sample gcode and factory file the heat bed stays ON (for those glass bed users) I can’t afford the E for that many machines running 24/7 🙂 already pushing $100 a month in E alone for the machines!

Let me know if you discover any tricks and if you have success. this is REV2 if I make any changes I will change the rev number so stay tuned for updated if I need to make any. I think I am really close to licking it.

and thank you to 3dverkstan for making it and Devon Montes Make Anything for reminding me about this process. I played with it a few years ago but had forgotten about it. he did a nice video on it!