SoliForum - 3D Printing Community — [ABS] Polylac PA757

Re: [ABS] Polylac PA757

2017-04-17T05:49:39Z

I also tried Pa757 . It is a very nice plastic to extrude and print with. I used the black pa757 granules to make filament with. Extrude temperature 200 degree. It extrudes and prints very shiny and has a good layer bonding.

Re: [ABS] Polylac PA757

2016-12-17T04:40:44Z

elmoret wrote:

Feel free to start a Irogran A85 discussion thread if think it'd be helpful. I haven't had time to try any, but genesat purchased some.

I actually made some progress with the A85. It seems drilling out the nozzle is important even with lower temps. I'll be able to give my report by Monday.

Back onto PA757, I completed a Raspberry Pi B+ w/screen case and the material really does behave like MG94 while printing, but has the natural look of PA747. PA757 needs more heat after printing to prevent warping, so either let the part cool inside of the build chamber, or run a chamber heater and cycle the heat down close to ambient temps before retrieving the print.

Re: [ABS] Polylac PA757

2016-12-16T03:09:50Z

75% of MG94 speed is actually a little better than I thought.

Feel free to start a Irogran A85 discussion thread if think it'd be helpful. I haven't had time to try any, but genesat purchased some.

Re: [ABS] Polylac PA757

2016-12-16T01:01:14Z

Virgin MG94 I usually get about 12" per minute.
I'd actually like to color the PA757 with black powder colorant to really inspect the finish.....maybe after I'm done pulling my hair out from the Irogran A85

Re: [ABS] Polylac PA757

2016-12-15T15:50:39Z

That's about what I expected. For reference, what speed did MG94 extrude at on your setup?

[ABS] Polylac PA757

2016-12-15T04:44:48Z

I recently got my order from Filastruder for some Irogran A85, Polylac ABS PA757, and PETG Eastar 6763. I am exceptionally happy to have them. But today, we will stick with the ABS PA757

Extruder:
Mostly stock Filastruder v1.6 #1870 extruding vertically with full barrel header wrap insulation, melt filter, and a Filawinder

Drying:
PA757 pellets look nearly identical to MG94

I never had to dry pellets, so I printed a basket and drilled 1.5mm holes in the bottom and sides to allow heat to creep in, but small enough so the pellets couldn't fall though. I placed said basket containing the PA757 pellets and some silica on a Printit Industries Hale bed and ran the heat at 115c within the enclosure for about 4 hours. The following picture is while I was drying PETG pellets without a lid (for documentation purposes).

Extrusion:
Temp: 189c
Rate: 8-10" per minute
Average diameter: 1.74 +/- 0.03mm

Printer:
Solidoodle SD2, E3D v6, Volcano w/.6 nozzle, Titan extruder, Lawsy carriages, Claghorn direct Y drive, bed stabilizer

Printing:
Printing was done with the exact same settings I use for *most* ABS filaments. In the case, MG94 and PA747 settings work just fine with 232c/97c. Speed was 80mm/s at .3951 height with 80% infill.
Raspberry Pi B 3.5" screen lid

Atlas 3D scanner frame section

Comparison to available filament:
I do not believe I have ever purchased PA757 filament, though it looks and behaves very similar to Octave and Coex filament.

Takeaway and comments:
PA757 has a sheen of light that reflects off of it, but not as much as MG94 which looks like it was acetone smoothed after printing. It also extrudes slower than other ABS plastics similar to PA747, but doesn't give off fumes as bad. The variance was not as consistent as MG94 which I can get close to if not dead on 0.01mm tolerance at times.