Questions re: DIY box style speed reducer

[AlZilla]

@fibersport, I'm not seeing any pictures ...

[fibersport]

It wouldn't let me upload them even after resizing, trying it again.

Doesn't seem to be working, I see them after I pick them and watched as they were uploaded, they are both around 500 kB so well under the 1.46 MB limit.  Anyone have any suggestions?

Edited August 10, 2023 by fibersport
more information

[Wizcrafts]

4 hours ago, fibersport said:

It wouldn't let me upload them even after resizing, trying it again.

Doesn't seem to be working, I see them after I pick them and watched as they were uploaded, they are both around 500 kB so well under the 1.46 MB limit.  Anyone have any suggestions?

Disable any ad or script blockers you have running.

If you are using a computer to manage the forum, but the photos are on your phone, and the phone is plugged into a USB port to open its files, download the photos to a folder on your computer, then upload them to the forum. I often run into this problem when I try to upload photos that are still on the phone, while using my computer. If you are going directly from the phone to the forum, and the filesizes are under the limits, try sending just one photo. If successful, add another after the first one appears in your post. You should have enough time to edit the post several times.

[fibersport]

They were on my phone but I sent them to my computer via email and then resized them to around 500 kB and then saved that file to the computer - phone font size is way too small for these older eyes!  

I am uploading them again but have moved them to the C drive on the computer rather than my Microsoft365 drive, maybe that's the problem.  It was not, I clicked on "insert other media" and they appeared.  Must have been user error ....

Edited August 10, 2023 by fibersport

[AlZilla]

I appreciate you making the effort. Straightforward design. I can see where getting the belts just right might be ticklish but tensions are pretty forgiving on these things.

Looks like the axle shaft just floats? The belts should keep it from walking sideways.

Very nice.

[dikman]

Very nice job! Simple and effective.

[fibersport]

Thanks for the compliments.  Belt tension does take a little effort but not too much, I found setting the longer belt first since the only tension is set by the spring.  The smaller belt is then adjusted using the motor adjustment as if there were only one belt.  The bearings have two set screws each which prevents the shaft from going side to side.  I had to drill and tap the pulleys for a set screw which I used a regualr screw for now along with small flat spots filed into the shaft and also a little Loctite retention compound.  It is simple and might not hold up to 8 hours a day use but I think it will suit my needs just fine.  All total I think I paid about $57.  I had the angle iron laying around, I could have saved a few bucks had I used a shorter shaft but I wasn't sure how my final design was going to need.  

[Burkhardt]

Looks simple and cleanly done, if only everything turned out like that.

[fibersport]

Well even this had its issues, had to redrill the holes in the leg to get them straight using my drill press instead of my hand drill which even after measuring still didn't drill the holes lined up!  Even the simple things throw you curve balls -

[Kfd518]

@shelr1, that is a national hardware #500-30000 garage door step plate. They unfortunately are out of production now. I’m working on a similar setup but went with a much larger large pulley @10” HA HA by my math I should be able to run 1 stitch every 2 seconds if I so choose.