oldguy Posted February 8, 2012 Posted February 8, 2012 What is the optimal RPM range for a star roller?
Xtreme Pyro Posted February 8, 2012 Posted February 8, 2012 What is the optimal RPM range for a star roller? Somewhere between the 40 - 80 RPM range, mine runs at about 60 RPM usually.
DanielC Posted February 8, 2012 Posted February 8, 2012 (edited) I'm not really sure there is an optimum speed. There are so many variables: angle of the drum, shape and size of the drum itself, size of the stars to be rolled and probably a bunch of other stuff.I have looked everywhere for trying to find the same thing. I have seen formulae for ball mills, but not star rollers. It seems the consensus is that as long as thestars cascade properly that is what you want. Sounds simple enough. I use a poly drum concrete mixer and it runs two speeds 25 and 50. I run it at 50 and it works wellfor what I need. I looked around and most say 30-60 usually works best, but if your drum has a big flat side you could go less than that. I wish I had a variable speedso I could tune it in for what I was rolling. Maybe that will be a future project. Anyway, I hope this helps a little bit. Btw here is a link for a three speed dc motor for 20 bucks http://www.allelectronics.com/make-a-store/item/DCM-434/12-VDC-GEARHEAD-MOTOR-3-SPEED/1.html Edited February 8, 2012 by DanielC
oldguy Posted February 8, 2012 Author Posted February 8, 2012 I guess the consensus SO-FAR is a motor rigged for adjustable variable speed say from ballpark range of 30 to 100 RPM?
TheArchitect23 Posted February 8, 2012 Posted February 8, 2012 (edited) I vote for 60 rpm. My 90v dc motor I salvaged with speed controller is max 80 rpm. The speed controller helps slow it down once the stars grow larger. You can get away with 40-50 rpm if your angle is higher imo. This is based on a 5 gal bucket size roller. Edited February 8, 2012 by TheArchitect23
dagabu Posted February 10, 2012 Posted February 10, 2012 (edited) OOPS! I didn't read the title very well. I have a 60 RPM gear box on mine and it is a just a tad slow for my liking. With a variac, I can speed it up to 66-67 RPM and the stars roll much better. I have a 16" bowl that i use to roll stars. -dag Edited February 11, 2012 by dagabu
Col Posted February 11, 2012 Posted February 11, 2012 (edited) A clear end plate on a star roller would make it difficult to spray the stars I have a variable speed star roller but i prefer to use an 11" slick kart tyre on the ballmill in place of the mill jar.http://i770.photobucket.com/albums/xx341/colinspyro/variablespeedstarroller.jpg Edited February 11, 2012 by Col
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