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Exile Machine Backfin for MIAD

by Exile_Machine, published

Exile Machine Backfin for MIAD by Exile_Machine Mar 25, 2017
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505Views 130Downloads Found in Sport & Outdoors

Summary

Backfin backstrap for MIAD v1.1 (only) grips (fits either Type 1 or Type 2 model). Features a sturdy fin that blocks the user's thumb from wrapping around the grip and a sturdy Thumbshelf to retain assertive control.

UPDATE: Attached Simplify3D factory file for 2UP Right Handed, plus Gcode file for printing 2 units RH for direct use on Ultimaker 2+ with Algix APLA filament, 0.6mm nozzle. Just add your own Ultimaker 2+ and start printing.

Print Settings

Printer Brand:

Ultimaker

Printer:

Ultimaker 2

Rafts:

No

Supports:

No

Resolution:

300 micron

Infill:

40% minimum


Notes:

(Ultimaker 2+ Printer, not Ultimaker 2.)
Backfin itself - print with Aligx 3D or 3D Fuel Advanced high temperature PLA (APLA) Nozzle 205-210C, bed @ 40C. 300 micron layers, 4 top solid layers, 3 bottom solid layers, 2 outer/perimeter shells. 50-60 mm/s print speed. Use a 0.6mm nozzle for a good balance between surface finish and print speed. Print on PEI sheet sanded with 320grit or a thin film of purple gluestick on borosilicate glass. Could possibly use PETG as well though the finish would be very glossy. Could be printed in Taulman 910 nylon as well but APLA works exceedingly well and is very easy to print and gives a good semi-matte surface finish. Use fans on 100% after the first layer. Cooling is critical to the success of this part and depending on what printer you use you might need MOAR fans than what are built in to the machine. We run off the shelf Ultimaker 2+ and the stock fans work fine, but we print a full bed of parts at one time. You may need to print multiple units to allow each part to cool in between passes.

The Spring: The materials and processes to produce the spring are critical. The only material we have found to work is Taulman 910 Nylon alloy in clear/natural (their 910 black won't work).

Print on a heated borosilicate bed or PEI sheet, in either case it must be coated with a 50/50 mixture of Elmer's white glue and water. Use a 0.4mm nozzle, no larger. Layer thickness 200micron. Top layers 2, Bottom layers 2, Outline/perimeter shells 2. Adjust your build platform so that the first layer has very little to no 'squish.' This is critical because if you make the spring with a squished first layer it'll be too stiff and won't flex properly. Infill 15%. Nozzle temp 250C and that's measured at the nozzle, you may need to set your temp higher to reach that. Bed temp 50C. No Cooling fans!

Note: it is absolutely VITAL for the success of the spring function that the Taulman 910 be bone-dry before printing. Place the spool in a PID temperature-controlled oven at 45C (113F) for several hours before printing. Store (when not in use) in a sealed airtight container with silica gel dessicant. We monitor storage condition of all Taulman Alloy 910 material with a humidity meter and find that material stored at 24% humidity will print up just fine even on prints lasting several hours.

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