This is a part of larger project - airsoft electic toy gun mk3. Main hub for this project https://www.thingiverse.com/thing:2916390
Warning! This assembly now contains all parts for hop-up, including adjustment lever parts. They still may be updated, but already work consistently. No instructions for assembling hop-up - too busy now =(
Mark this part as work in progress for now.
Hop-up and channels
Warning - before print, make sure your printer is calibrated good. Sides of upper gearbox must be exactly 179mm long. If you have to scale details to make them appropriate sized, scale all oter details of this project too.
- Left and right sides of hop-up (layer 0.2, infill 40%), lay on flat (outer) side, no supports.
- Barrel fix (layer 0.2, infill 40%), lay on flat side (check small teeth position).
- Cross (layer 0.2, infill 40%), lay on flat bottom,no supports - print 2.
- Barrel 455mm (AK)
- Hop-up rubber
20x10mm alluminium channels - about 1.5m total length. Standard issue, available for sale in building megamalls.
M4 nuts - 8
M3 nuts - 7
M4 flat head screw, 16mm - 4
M3 sunk head screw, 13mm - 6 (use bigger sige and file them down)
M3 sunk head screw, 25mm -1 (for fixing barrel fix)
Take all parts, remove extra plastic traces, dril all holes to be exactly 3 and 4 mm.
Holes for m3 nuts intentionally left blind to ensure good printing without support. Drill them through.
Cut a length of alluminium channel (exact size on pictures), than drill all required holes. All holes must be m4, but if you misalighned hole a bit - just make in a bit bigger or grind with a small file. One big hole - drill it with m10.
Install m4 nuts into cross details. Fix nuts with screws and glue nuts in place with acetone/abs mixture or some glue.
Assemble 2 crosses, upper and lower channels and install hop-up in place.
Only appropriate foto by now - hop up and rails assembled with left part of upper gearbox