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| This image shows a collet closer as found on a Hardinge® Lathe retro-fitted with a Fagor® 8025T CNC Control, servos, sensors, etc. All of our other small CNC Lathes are fitted with Dunham® collet closers. |
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| The collet closer is located at the end of the spindle tube and I've added descriptive text to this image. Also marked is the air lines going to the closer. The closer itself is an enclosed piston that is moved fore and aft by switching air pressure on one side or the other. The collet will is closed when the piston is pushed away from the spindle / headstock, and is pulling on the draw tube, so the air line nearest to the headstock would have pressure when closed. |
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| I'm not sure about the part with question marks on it (??), it appears to me like a harmonic balancer. |
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Also marked in the image is where the RPM Sensor is located, there is a small (about 3/8" wide) cogged belt (located under the stainless cover in the image) that runs from the spindle to the rpm sensor. I wanted to show this because if the belt breaks or comes off it's pulleys the machine will seem to die, no errors are shown, will not run a program, nor turn the spindle. On our particular machine these belts have been somewhat problematic for us in the past, now we keep a spare on hand.
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