3D Printed Gearbox for Denso Throttle Motor Available

[AndromedaOne]

Ari423 - I like the idea of using adding a second motor, I'll definitely do that.

Pilleya - The gearbox is designed with 10:1 and 18:1 gear ratios and is designed to drive 1/2" Thunderhex shaft. It could easily be modified for 1/2" hex. We use a lot of Thunderhex so I designed the gears to fit that. Total weight is less than one pound. I'll look into adding a lower gear ratio, but that will probably be a new gearbox with a single gear off the main motor. Probably even more useful in this case to add the second motor option.

WIG1350 - The design does include grooves for the gearbox plate, but they are not deep and the motor does ride proud. I agree that bosses would be nice but including them would have required support material for most of the gearbox face. Recessing the motor would make the gearbox thicker by that amount. I do agree with you that the motor mount design is not optimal. What might work is printing a standoff plate that would mount on the engine before mounting to the gearbox. That would actually allow me to thin the whole gearbox down a little.

Thanks for the positive feedback everyone. I'll look into these improvements as time allows.

[blturner]

I 3D printed a gear for this motor for aerial assist. I was trying to get as compact as possible and could not get enough reduction in the space allowed, so I used a ring gear on a flat plate. Regular ring gears are expensive, seldom available in the size you want and can't be made on a flat plate. The ring gear also makes a slightly stronger contact area.
The gear is sized to mount on a 1/4 inch bolt centered in a 1 inch square tube. I strapped the motor to the tube with a hose clamp and some double faced tape.

It was not strong enough for handling the huge balls in aerial assist but would have no problem with this years small ones.

I would also like to see a gearbox that matched the mount holes of the versa planetary but that might be too compact.

As to the usefulness of this gearbox/motor verses the more powerful ones. Most teams can 3D print this for less than 1/4 the cost of a versaplanetary and you can stall this motor for a lot longer than a 775pro.

[Ari423]

Does anyone have the motor specs for these? I did some searching but all I could find were old posts with now broken links. I would really like to get some data on the motors' power before I use them on a robot.

Originally Posted by blturner

As to the usefulness of this gearbox/motor verses the more powerful ones. Most teams can 3D print this for less than 1/4 the cost of a versaplanetary and you can stall this motor for a lot longer than a 775pro.

I don't know the exact motor specs, but I am 100% certain that these motors are nowhere near as powerful as a 775pro. If you don't need a lot of power, that's fine. But I would definitely not call this a better replacement for a 775pro. That being said, I would love to get the STL or STP for that ring gear if you don't mind PMing it to me.

[pilleya]

Originally Posted by Ari423

Does anyone have the motor specs for these?

18watt peak power and no load RPM around 5500( very similar to a CIM in terms of rpm)

[EricH]

Originally Posted by pilleya

18watt peak power and no load RPM around 5500( very similar to a CIM in terms of rpm)

Yeah... but not within an order of magnitude of a CIM's power.

[blturner]

Motor specs are here: https://firstfrc.blob.core.windows.n...rManual-V1.pdf

That is linked from this page: http://www.firstinspires.org/resourc...ical-resources

[s_forbes]

We are actually going to use this motor this year, I never thought the day would come! We are also 3D printing a gear and gearbox for it, intended to turn a turret or two. Just a single reduction for us though, 80:12. Printed on a Makerbot. The total assembly weighs less than any of the window motors in the KOP, which is nice.

Can send CAD files if anyone is interested, this is the first iteration. The next one should be a little better.





https://www.youtube.com/watch?v=xYpqUxyOp68

[blturner]

Lets see if I can post the stl of my ring gear.... Had to zip it.
The holes are for mounting a vex 2 inch wheel because that was what we had.
I never thought I would use this again so I never bothered posting it.
The actual CAD file was done in the program that came free with the CUBE printers they gave us that year. So I don't think that would be useful.
But let me know.