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Hi All, I have in my possession a variable speed drive manufactured by Metron instruments from Denver Colorado which adjusts the speed of the output shaft relative to the input by a variable adjustable ratio - from 0.1 to 2. The output turns in the opposite direction to the input. The unit was...

Hi everyone, I am looking for some plans for a gyroscope to build for my nephew. I am looking for the straightforward spinning disk style with a protective pair of loops surrounding it. I have some beautiful instrument ball races around 4mm OD that would be good to use - I have a strip of 20 or...

Well I managed to anyway... I hesitate to post a "how to" in the presence of the illustrious contributors to this site but I have seen several comments about modifying (mostly Chinese) ball screw nuts using angle grinders or bench grinding equipment. I am in the middle of an upgrade of my CNC...

Hi All, Does anyone have any advice on how to align a ballscrew in my 4 jaw lathe chuck? I need to machine the ends to allow them to fit into the bearing blocks. I (hope!) think I have the technology to cut the ball screws themselves but I am struggling working out how to ensure the screw is...

Hi All, I am about to add ballscrews to my existing BF20 CNC conversion (working pretty well on the combination of steppers, original screws and some home assembled electronics as well as Mach3) and I am bemused by the price differences between what is available. I can source (from...