29k15 shuttle gear remanufacturing

[chrisash]

Are you looking for the end product in steel or Nylon' for the gears, I doubt the bar would stand up long term in |nylon but the gears should

[29k15engine]

Steel these are just for prototyping

[29k15engine]

Ok just done some measuring compared to my good gears, the differences are 0.1mm on cog tooth thickness ie prototype is thicker and diameter of cog overall needs to be .2mm less apart from that not alot needs to change.

Have a comment if you can critique more the merrier.

 

Her are the parts fitted to the base plate, little tight but these changes may be all that is needed.

 

 

[29k15engine]

Video of parts moving also shows where they need a shade more room to move

 

29k15 shuttle prototype video

Edited June 29, 2021 by 29k15engine

[29k15engine]

Ok I have revised the drawings over the past few days, is is the most accurate. I used a microscope to image both the cogs and rack.

 

Nearly there now.

 

 

[chrisash]

Don't forget the tolerance's in 100 years ago were far larger than todays , also PLA has quite large growth when printed on some objects, I did try making some Nylon printed gears and that had far more stable size.

I would suggest using Fusion 360 for the design and you can test the fit using the program before you print

Edited July 1, 2021 by chrisash

[29k15engine]

Excellent thanks Chris,

My friends 3d printer is a ELEGOO Mars Pro MSLA 3D Printer so prints with more accuracy.

We are having a go with a Wire EDM machine to try it in steel to make 1 prototype , we will see.

It good work to see how accurate these processes really are.

Im also looking at having them laser cut but am unsure on the accuracy needed if I went this way.

Edited July 1, 2021 by 29k15engine

[chrisash]

You need to accurately measure your finished items and then make a percentage adjustment to your slicer to get the best results, all 3D filament's react slightly different on different printers

[LindanHotAir]

17 hours ago, 29k15engine said:

Excellent thanks Chris,

My friends 3d printer is a ELEGOO Mars Pro MSLA 3D Printer so prints with more accuracy.

We are having a go with a Wire EDM machine to try it in steel to make 1 prototype , we will see.

It good work to see how accurate these processes really are.

Im also looking at having them laser cut but am unsure on the accuracy needed if I went this way.

You could also check out using a water jet cutter. It wouldn’t have the same thermal effects as a laser.

[DonInReno]

Wow - a wire EDM should make short work of it!   Great work!  Your project has me reconsidering a worn out patcher - in the past I’ve steered clear of them because of gear issues.