Keyboard Shortcuts
Likes
Search
Re: #MISC Pulleys?
#MISC
¿ªÔÆÌåÓýPerhaps do an experiment for all of us. Here's the premise. ? As long as the two pulley V grooves are identical in shape and depth and the same diameter of course and the belt is the same diameter over its entire length the encoder and the spindle should stay in sync. ? So with the lathe stopped place a ruler along both pulleys aligned with the center of each pulley axis and draw a line on each pulley from the center in the direction of the other pulley. ? Now if you were using toothed belts months/years later when you turn the spindle by hand until the lines point to each other a ruler will show they still line up. ? The question is, over a few minutes, hours, days will the lines on the non-toothed belt pulleys still line up?? ? If they do you won't have slippage. If they don't and it's in the minutes or hours then you can't trust their position accuracy. ? John Dammeyer ? ? From: [email protected] [mailto:[email protected]] On Behalf Of alexphredorg
Sent: April-19-20 11:15 AM To: [email protected] Subject: Re: [digitalhobbyist] #MISC Pulleys? ? How does a toothed belt provide higher accuracy than a round belt between the encoder and spindle? ?Assume high quality bearings and essentially zero friction at the encoder side. ? A timing belt is ideal, but in my case it wasn¡¯t a good option and the round belt has been working well including with thread cutting. ?A timing belt for me either would have added the lash and noise of a gear train or would require making a custom two part pulley that clamped around the narrow part of my spindle ¡ª that would potentially also add inaccuracies. ? ? ? alex From: [email protected] <[email protected]> on behalf of Richard via groups.io <edelec@...> ? There is no way I would ever use a flat or round belt to drive an |