Re: Barfeeder
hi gunda, there are several methods :
1) like rcs60 said, stock is chamfered at both ends, and a little bit turned od at the end that goes inside the collet
feeder will keep on pecking, while the collet will be spinning at a low rpm
remnant is pulled back and dumped inside the feeder
2) some models do not have a collet, but a pusher
there is a mechanism that rotates the bars, and gently puts them inside the v-shaped loading channel ( bars have to be oriented before the mechanism that rotates them )
cnc spindle stops at a specific phase, and waits for the pusher to bring the material
remnant is dumped inside the cnc lathe
this method has the advantage that it does not require to turn + chamfer the material, but only to debur it
3) more complex models :
... do not require that the material is oriented before the mechanism that puts the bar inside the v-loading channel
... may have sensors that detect if the stock is seating ok inside the v-channel, because, sometimes, it may not fall ok, but remain suspended at a higher position; from this moment, 2 things may happen :
...... when the pusher pushes the stock, it will fall, so is like nothing happened
...... if it does not fall, then it won't be able to pass through the reduction sleeves, and the feeder may be stopped automatically by a torque-limit on the servo
all these should work for :
... round bars ( sections has many simetry axis )
... hex ( section has 6 simetry axis )
... square ( section has 4 simetry axis )
i don't know how are handled those with 1 or less simetry axis, thus i don't know about custom profiles / kindly
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