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07-06-2019 08:08 AM #21
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A note about the concern of increased torque, that's actually one of the reasons for gearing down, to provide more slow speed needle force when momentum isn't there. Looking for some info on my machine, (Yamata FY5318) I ran across a video an upholstery guy posted, showing his digital servo feeding a step down pulley feeding the stock drive pulley. His would turn down to 30 stitches per minute, and he mentioned the increased torque giving him the force to push through 4 thickness of harness leather at that extreme slow speed, and demonstrated it!
https://www.youtube.com/watch?v=KUU-gF6VWWwLast edited by rspears; 07-06-2019 at 08:20 AM.
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