Frank-O-Squid Calibration

The saga of rebuilding and reconfiguring my old Thing-O-Matic around an Azteeg X3 controller and Marlin software at Squidwrench continues apace:

TOM286 - with calibration scrap
TOM286 – with calibration scrap

A major benefit of doing this at the group meetings has been showing everybody that 3D printing isn’t a mass-production process. The pile of calibration objects includes an inordinate number of those thinwall open boxes that take about five minutes each:

3D printed calibration scrap
3D printed calibration scrap

But it’s producing reasonable quality stuff again:

TOM286 - First Dodecahedron
TOM286 – First Dodecahedron

The loose threads on the outward sloping sides of that dodecahedron show that I forgot to lower the temperature after a bit of trouble with adhesion to the platform; the problem turned out to be an interaction between Slic3r’s minimum layer time and minimum printing speed settings that I didn’t notice.

A disadvantage of doing this at the group meetings is that two or three hours of tweaking and printing, once a week, draws the whole process out far longer than anyone else expected… [grin]

2 thoughts on “Frank-O-Squid Calibration

  1. I’ve been meaning to ask… What’s your latest setup for heated bed platforms? I see kapton tape, you mention hair spray, do you have several platforms that you keep sprayed up, or…? Do you use the PVC dissolved in acetone solution as a glue anymore? Thanks!
    – Steve

    1. setup for heated bed platforms?

      For the M2 with PLA, a glass plate spritzed with max-hold hair spray works perfectly for PLA. Heat the bed to 70 °C and PLA sticks like it was glued in place. When the plate cools to room temperature, the object pops off by itself. The hair spray comes in a pump bottle, not an aerosol, and I smear it around in a smooth layer with a cotton cloth.

      For the TOM with ABS, plain old Kapton tape atop the aluminum plate is as good as anything. Clean it with acetone every now and again, then heat to 100 °C: it Just Works. Pop the plate out, cool, and the objects snap off easily enough.

      In both cases, the first layer runs at nose-pickin’ speed compared to the rest of the object (M2 = 25 mm/s, TOM = 10 mm/s), with the extrusion dimensions exactly the same as all the other layers (M2 = 0.20 mm, TOM = 0.25 mm).

      The ABS-in-acetone slurry worked reasonably well, but it had nothing else to recommend it… phew!

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