1 Topic by supraflyer (edited by supraflyer 2013-04-23 23:10:30)

  • supraflyer
  • Member
  • Offline
  • Registered: 2012-09-02
  • Posts: 86

Topic: fine tune the floating shafts alignment

With two clamps, 4" ratchet bar clamp/spreader (harbor freight 2$) Pittsburg item number 46805, two cheap dial indicators arranged as in photos I loosened the shaft timing bearings and stoked the y axis adjusting the belt alignment until the indicators showed less than .002" of travel over the full stroke of the carriage. Eyeballing the alignment of the belts to each other showed me which timing bearing to move. The shaft ended up about 1/8" outside the frame on one side and even with the frame on the other. Make sure to have the indicators the same penetration into the holder to insure the spring pressure is equal on each side.
The holder I used was Pittsburgh Dial Indicator Holder with 8mmx2mm Magnets from Thingiverse. I think it worked great.

Post's attachments

IMAG0357.jpg
IMAG0357.jpg 972.37 kb, file has never been downloaded. 

IMAG0358.jpg
IMAG0358.jpg 803.36 kb, file has never been downloaded. 

You don't have the permssions to download the attachments of this post.

2 Reply by op7ical

  • op7ical
  • Member
  • Offline
  • From: Orlando, FL
  • Registered: 2013-01-21
  • Posts: 136

Re: fine tune the floating shafts alignment

Sounds cool.  Can you do a comparison of print quality before and after this mod?  You might want to try printing some blocks with circular holes of various sizes.  This can reveal issues with horizontal backlash that might be treated by your rig.