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rough prototype of tiller actuator using 50rpm Makermotor
#1
After a lot of false starts with bad IMUs and numerous software gremlins I finally have a reasonably working autopilot. It has steered our F31 Corsair for about 250 miles in nice weather without any misbehaving. I built a rough prototype of the drive mainly to get speed and gearing dialed in before I spend the time to build something nicer. I started off with Sean's idea to use a windshield wiper motor but quickly ran into the problem of attaching a pulley to the non-standard shaped output shaft. Ended up using a 50 rpm Makermotor PN01007-38 gear motor with a standard 3/8" shaft. The video shows details of how this super simple, parts bin drive works. 



Simon
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#2
I really like this! The motor looks almost the same as windshield wiper motor, is just the output shaft different? Could you not modify a wiper motor to work?
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#3
(2021-06-11, 01:28 AM)seandepagnier Wrote: I really like this!   The motor looks almost the same as windshield wiper motor, is just the output shaft different?   Could you not modify a wiper motor to work?

I think it is the same as a windshield wiper motor. I’m sure a wiper motor can be made to work but it’s so much easier to deal with a 3/8” shaft and a set screw since that fits all sorts of off the shelf pulleys.
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#4
Has anyone found a wormless geared motor that would allow you to steer without disengaging the motor.
The power of a motor of this type would do without the endless screw. The Octopus RS sailboat drive has no clutch and a smaller motor. It can always stay engaged.

It wouldn't bother me at all that the helm of the boat was braked a bit.
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