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Well, I did it at ~20mm/s for the first layer, 70mm/s for a few more layers, 140mm/s for yet some more, and then finished the last 85% of the print at 210mm/s. I increased the hotend temp by 20 deg C to 240 deg C to avoid extrusion issues, and it worked pretty well! I was using virgin MG94 ABS extruded by my Filastruder yesterday, so it was good quality. The video (done uploading!) is interesting, and you can see I didn't get good bed adhesion due mainly to some issues with extrusion rate (too little plastic) that I was trying to solve using this print. The 300% feedrate idea came to me from another thread. I guess an Arduio Mega 2560 compatible board is perfectly fine for fast print rates :)

Note: I got EXTREMELY GOOD results from this test, the calibration cubes came out PERFECT at this speed, except for overhangs, but that can be fixed with supports. I got such good results, I plan on using 200mm/s as my fast speed and I'm going to try out 125mm/s as my go-to everyday speed. I just have to make sure I bump up the speed after the first few layers and I increase the hotend temp to match. I ended up printing the "5mm calibration cubes" at 2x size (so 10mm steps) in 3 hours, but that is because I didn't up the speed to 210mm/s until about 60 layers into the print (I printed it at .1mm layers) and it slowed near the end due to the slicer (Cura) slowing down for minimum layer time.

Q*Bert will be happy about that video. Is that polyetherimide?

Sounds pretty quiet - you have dampers on that?

626Pilot wrote:Q*Bert will be happy about that video. Is that polyetherimide?

Nope, MG94 ABS I extruded myself.

McSlappy wrote:Sounds pretty quiet - you have dampers on that?

Yea, I have the Trick Laser ones made from cork-like materials.

I think he was asking about the material you were printing on, though I may be wrong.

I was talking about the amber stuff on the print surface.

626Pilot wrote:I was talking about the amber stuff on the print surface.

Oh, heh, no. I have a copper heat spreader plate below the glass that gives a 2-3 deg C even heat surface over the whole bed. I use hairspray for adhesion, although it's not working as well lately due to some extrusion issues.