Thingiverse
Linear actuator using geared retract motor. by tahustvedt
by Thingiverse
Last crawled date: 3 years, 1 month ago
I designed parts to make an actuator from these geared retract motor units I have.
This is the motor unit I used:http://www.ebay.com/itm/Worm-Motor-Control-Board-for-Retractable-Electric-Landing-Gear-/172104935631
EDIT:
After playing with it for a while I noticed that they will reverse if they are blocked or if the channel is flipped when they are unpowered. I bought my motor units six months ago, so this issue may be fixed now, but for now I can't recommend buying these motors unless they are confirmed fixed.
Assembly:
1 - Thread the plunger onto the M3 shaft half way down. A nut can be slid into the slot on the underside of the plunger for a stronger thread.
2 - Insert the plunger end and the switch board into the housing.
3 - Carefully slide the board and motor unit into the housing. The board should be pushed in by the edge of the gearbox, and the gearbox should be oriented with the protruding small gear pointing up towards the board/empty space so that it doesn't rub against the housing wall.
4 - Push everything all the way in.
5 - Attach the bracket. If it's printed from anything other than nylon, it can be warmed with a heat gun prior to installation to prevent breaking as the lugs are spread.
6 - Insert an M3 set screw on the bottom of the housing to lock the gearbox in place, and attach short M3 screws to the hinge point if necessary.
This is the motor unit I used:http://www.ebay.com/itm/Worm-Motor-Control-Board-for-Retractable-Electric-Landing-Gear-/172104935631
EDIT:
After playing with it for a while I noticed that they will reverse if they are blocked or if the channel is flipped when they are unpowered. I bought my motor units six months ago, so this issue may be fixed now, but for now I can't recommend buying these motors unless they are confirmed fixed.
Assembly:
1 - Thread the plunger onto the M3 shaft half way down. A nut can be slid into the slot on the underside of the plunger for a stronger thread.
2 - Insert the plunger end and the switch board into the housing.
3 - Carefully slide the board and motor unit into the housing. The board should be pushed in by the edge of the gearbox, and the gearbox should be oriented with the protruding small gear pointing up towards the board/empty space so that it doesn't rub against the housing wall.
4 - Push everything all the way in.
5 - Attach the bracket. If it's printed from anything other than nylon, it can be warmed with a heat gun prior to installation to prevent breaking as the lugs are spread.
6 - Insert an M3 set screw on the bottom of the housing to lock the gearbox in place, and attach short M3 screws to the hinge point if necessary.
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