Indexer motion for wire cutter
Indexer motion for wire cutter
(OP)
I posted this on Motion Control getting no replies so I am trying here.
I am designing a wire cutter mechanism
The mechanism consist in a 440mm shaft with a bearing support at each end. 25mm and 50mm diameter (see attached fie)
At one end there are bolted 4 cutter blades and at the other side there will be the mover
The cutter must spin and stop (indexer) at 4 dwell positions on every revolution. One ¼ rev every 0,375 seg so to achieve 160 cuts/min
Torque for each cut is 78,4 N.m
Please recommend a way of doing this
So far I was thinking about 2 alternatives
Alternative A: using a servo motor geared to the cutter shaft
Alternative B: using a rotary indexer activated by a constant input speed

I am designing a wire cutter mechanism
The mechanism consist in a 440mm shaft with a bearing support at each end. 25mm and 50mm diameter (see attached fie)
At one end there are bolted 4 cutter blades and at the other side there will be the mover
The cutter must spin and stop (indexer) at 4 dwell positions on every revolution. One ¼ rev every 0,375 seg so to achieve 160 cuts/min
Torque for each cut is 78,4 N.m
Please recommend a way of doing this
So far I was thinking about 2 alternatives
Alternative A: using a servo motor geared to the cutter shaft
Alternative B: using a rotary indexer activated by a constant input speed






RE: Indexer motion for wire cutter
I suggest you examine a 'Little Joe' wire and tubing cutter.
Mike Halloran
Pembroke Pines, FL, USA
RE: Indexer motion for wire cutter
There is a stationary part that close the groove and holds the wire inside.
This is why the shaft needs to stop between cuts
See attached drawing
RE: Indexer motion for wire cutter
RE: Indexer motion for wire cutter
Timelord
RE: Indexer motion for wire cutter
RE: Indexer motion for wire cutter
https://precisionparts.wmberg.com/gearBoxes
I don't know what your torque requirements are, but it may not matter; I doubt that WNB knows their products' limits.
Mike Halloran
Pembroke Pines, FL, USA
RE: Indexer motion for wire cutter
Might see some ideas in thang's videos and pages. https://www.youtube.com/user/thang010146/about
RE: Indexer motion for wire cutter
The wire is fed continuously but it hits a stop to prepare the wire for the next cut. The wire is pulled from a wire coil through several grooved rollers (feed rollers) and there is a little slippage between wire and roller until it gets cutted. I Hope my explanation is understood
RE: Indexer motion for wire cutter
For ~$3500, we bought a machine that pulled the hose from the spool, measured a programmable length as it was pulling, cut it off, dropped the measured piece on the table, and stopped when it had reached a programmable count or ran out of hose.
You couldn't homebrew a similar machine for that kind of money if your labor is worth anything.
I'm pretty sure that similar machines exist that can cut steel wire. So search, already.
Mike Halloran
Pembroke Pines, FL, USA
RE: Indexer motion for wire cutter
Sorry, I did not clarify this earlier
RE: Indexer motion for wire cutter
http://www.motiontechnique.com/rotodex-globoidal-c...