Quote:
Originally Posted by 4X44DAD
this is awesome who makes the screw drive mechanism and 100:1 gear reduction motor?
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check out these guys for gear motors - massive range covering almost any parameter (voltage, RPM, reduction ratios, physical size). this was the best selection I could find anywhere. They also stock a good range of bearings, brackets, hardware and electrical items for the DIY model enthusiast....
http://www.technobotsonline.com/inde...ategory_id=176
I basically went for the biggest motor I could fit between the chassis rails with 7.2V supply, then picked a gear ratio to provide reasonable tipping speed which should be about 30 seconds each way.
machined stainless steel screw drive came from these guys in the UK who will cut and sell to almost any length if you email them, I wanted only 250mm with matching nut and they charged the proportion based on the 'per metre' price:
http://www.worldofcnc.com/collections/trapezoidal
a but more expensive than buying standard threaded bar from your local DIY store, but the screw is 100% STRAIGHT (!) and since it is CNC machined it will have much less friction - especially under stress - than cheaper alternatives.