Darthluke824 Posted November 22, 2013 Posted November 22, 2013 Hello all, I have never posted on in the Technic area but I need some advice from an expert. I am looking to create a compact way using gears of slowing down a PF Motor speed that will be connected a door. I want to create a motorized door for a Star Wars base. I am going to use a standard Power Functions motor and the 1x4 Tooth Plate for the door similar to the doors of 7666. I need a way of slowing down the speed from the motor as the last time I attempted this the door jammed every time. I hope you understand what I mean. I can give pictures if needed. Thanks. Quote
Milan Posted November 22, 2013 Posted November 22, 2013 Hi, Post a picture or two. People will have better advices for you. There are many ways for slowing down gear speed, depending on the parts and available space you have. Quote
Alasdair Ryan Posted November 22, 2013 Posted November 22, 2013 Try this,it is geared down twice and uses a clutch gear. Quote
Darthluke824 Posted November 22, 2013 Author Posted November 22, 2013 Try this,it is geared down twice and uses a clutch gear. [sNIP] Many thanks, perfect for what I has after! Quote
me00rjb Posted November 22, 2013 Posted November 22, 2013 The 20T bevel gear driving the 12T bevel gear is actually geared up, not down... Quote
dhc6twinotter Posted November 23, 2013 Posted November 23, 2013 I would use a worm gear meshing into a clutch gear. Clutch gear could then drive an 8 tooth gear that is meshing to the gear rack. Quote
allanp Posted November 23, 2013 Posted November 23, 2013 (edited) To avoid any jamming you might want to have small wheels on the opposite side of the gear rack for the door to run on. Better still have another gear rack, so you have one on each side. Have you thought about other alternatives like a pneumatic cylinder? With that you would get a lovely pffft sound, no need for clutch gears and speed could be controlled (from slow to snap shut) by opening the valve only so far. Edited November 23, 2013 by allanp Quote
dhc6twinotter Posted November 23, 2013 Posted November 23, 2013 And of course allanp would suggest pneumatics! :laugh: Good idea, and the sounds would be awesome! Quote
Alasdair Ryan Posted November 23, 2013 Posted November 23, 2013 Or what about linear actuators? they are way more realistic that boring pneumatics. Quote
allanp Posted November 23, 2013 Posted November 23, 2013 (edited) A cheese cob would be better than an LA . Han Solo would be like "Quick, they are coming, close the door! Must close faster! Must close faster! Darn it. Well, we're dead now!!!" Edited November 23, 2013 by allanp Quote
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