Thread: Linear bearing upgrade options?
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02-03-2015 #1
Yes the enclosure is a good thing to have, the machine and all its electronics are in the enclosure and then I have storage space in the bottom.
I cut mainly aluminum, plastics, modelling foam and wood, a real mixture really . It can machine steel but I try to avoid it when I can.
all the ball screws are 1605 from linearmotionbearings and they seam accurate but I can get up to 0.09mm of "backlash" or flex when I push and pull on the machine, but the accuracy/repeatability of actual parts is more like 0.03mm which is really good. I am thinking of upgrading to a branded 20mm screw which should give me a bit more rigidity.
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04-03-2015 #2
If you actually mean backlash, then 0.09mm is a sign of the ballscrews being damaged, however it sounds like you mean flex in the machine? If that's the case then better rails is one way to help with that.
You don't need a larger diameter screw - it will only slow things down. The load rating and stiffness of 16mm ballscrews is plenty for the size of your machine.
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04-03-2015 #3
Yes I don't mean backlash as such I mean machine flex around the screw , so cumulative error between the screw support, ballnut and housing ect.
I wasnt sure about a larger screw and if it would actually improve things, but your right the extra mass will definitely kill acceleration.
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