Thread: King Midas mill conversion
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04-03-2012 #1
Subject of conversion in this thread is a mill from 1980's.
There are some underlying issues that I would hope to address during the conversion:
- huge slack on Z-axis (covered here in detail: http://www.mycncuk.com/forums/showth...g-a-conversion )
- large slack on both X and Y -axis
Have read as much as possible, trying to learn from other machinists build-logs. As a result, here is a draft shopping list
- items in blue relate to axis/ballscrews.
ITEM
NO.PART NAME Length QTY 1 Nema 23 stepper motor, 3Nm (425 Oz-in) - 3 2 PM752 Microstepping Driver 3 3 Power supply 400W - 1 4 Coupling - 3 5 MBA motor mount - 3 6 X, Y, Z-Axis Ballscrew Fixed Support Block, FK-type
3 7 X-Axis 1605 / C7 ballscrew 581mm + ballnut 581mm (520mm usable thread) 1 8 Y-Axis 1605 / C7 ballscrew 346mm + ballnut 346 mm (285mm usable thread) 1 9 Z-Axis 1605 / C7 ballscrew 386mm + ballnut 386mm (325mm usable thread) 1 10 Ball nut housing (X,Y,Z-axis)
3 11 X and Y-Axis Ballscrew Floating Support Block, FF-type
2 12 Z-Axis Ballscrew Floating Support Block, BF-type
1
In view of the mill, please can anyone spot here
1) Something clearly wrong ? (something one would regret later?)
- eg. size of motors
2) USB vs. parallel port
- that is something I keep on thinking. Have read about arguments for / against.
- Kind of would like to go USB, but I have read parallel port is the right thing to do.
3) Cables and sundries
- worried about little bits missing from the list. (trying to buy all in one go, to save on shipping fees)
For now I have left out from shopping list "pulleys" and "belts". Hope could have this machine running some day, then later add belts/pulleys. Not sure how this conversion is going to turn out, will it run or not.
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