Alternative gear and worm gear for Inmoov Robot shoulder
Derived from
Description
Instructions
I printed these parts in ABS on an UP! Pro 3D printer at normal print speed and using a .3 mm layer with an infill level one step below 100% infill, viz, almost solid.
You must be logged in to post a comment.
Great, I'm glad to see remixes. First the cylinder of the gear is now round when mine was with faces which had to be smoothed. Does the angle on the gear helps? When I used mine I didn't have bind, but no slack either. Grease is really important because there is pressure on the parts. Plastic parts will worn with time, that is for sure.
The angle of the teeth needs to match the pitch of the worm gear unless you want backlash or binding. I was curious, though. It seemed like the pitch angle for the worm gear was about 20 degrees while your involute profile gear had a pitch angle, I estimate, of about 32 degrees. I reset both to 20 and wound up with a gear radius of 31.5 degrees to get a no-backlash fit. Was there some design protocol you were using there or did you develop that gear pair intuitively?
I wondered why the faceting of the cylinder drum was so low resolution. Which 3D CAD package are you using?
License
More from ForrestHiggs
More from Robotics
I printed one and it was a good fit the only problem was after bedding in the worm gear i got wear on the shoulder of the worm and the housing looks like the angle of the teeth put a side load on the worm causing wear. I used a cordless drill to bed in the gears if you use a motor fixed to the housing then the worm wont float as much
like post a picture on the weekend