Hi group,
I have been lurking for a couple months now. I have been putting together stuff for an aluminum constructed wood/aluminum router type machine. I have debated about driving the gantry and can't decide on two screws vs one. I have access to a couple large diameter lead precision ground ball screws and nuts, one is 1.5 inch diameter thread length 48 in (y axis), and the other is 2.25 inch diameter with 67 in thread length (x axis).
The motors I have are the reliance electric from ebay currently listed as ebay 3800676277. These are DC brushed servos partial specs (from listing) 120 v, torque constant is 5.5 k=lb in/amp, back emf 65v/kRPM, 1750 RPM. No mention of amps. NEMA 34, 500 line encoders.
I know these are big screws but I have them , are they too big for these motors? Are there problems with using screws this size as far as 'momentum' and damage to the motors?
The table will be somewhere in the neighborhood of x=6 ft and y= 4 ft.
I thought about the 5/8 in screws and using two with a single motor but was worried about whip, however after looking at these screws I am concerned they may be too big.
Also I have not decided whether to use geckos or rutex.
Any thoughts about the screws or drivers would be appreciated.
Thanks,
Jim