Rebel 80 & 102 Servo SE Brochures:
Rebel 80 & 102 Servo SE Technical FAQ
1. How do I "home" the bar feeder (also referred to as "resetting the zero point")?
Begin with the long or the short pusher forward about a foot. Then press the "Manual" block in the upper left hand corner of the screen. This will bring up a new screen. Press the button "Maint Screen" to bring up the maintenance screens. Press the "Jog/Set Pusher" button. The screen will display the pusher menu. Press the top right button, "Disable Servo". By hand, move the long pusher to within ½ inch of the home proximity switch at the rear of the bar pusher's stroke. Press the top right button again which now says "Servo Disabled" to restore the servo drive to operation. Press the top left button, it will say either "Reference position lost" or "Reference OK". The bar pusher will move very slowly toward the home proximity switch until it reaches the hard stop. During this movement the "reference OK" or "Reference position lost" button will blink. When the movement is complete the button will be steady and say "Reference OK". The position on the screen at this point will be negative 1.0mm or the inch equivalent. The pusher position must be 0 before the V-tray will operate. Push the "Pusher Advance" button on the screen until the pusher position is greater than 2.0mm. Push the "Go to home position" button and the pusher will return to zero. Press the "Maint Screen" button, then the "Start Screen" button to exit.
2. How do I shorten my remnant length?
The remnant length is controlled by the parameters "Max End of Bar" and "Part Length", the distance from the chuck or guide bushing the cut-off occurs and the length of the material in the guide channel. The front limit position is the farthest the bar pusher can travel forward into the lathe. The part length is the sum of the overall part length, the width of the cut-off tool and the amount of material left for facing. When the pusher doesn't have enough travel left to move the distance in the part length parameter before reaching the front limit position the End of Bar signal is sent. If the remnant is too long verify the front limit position parameter and the part length parameter. Keep in mind that on all lathes there will be a certain amount of unusable material. This unusable length can be measured by moving the bar pusher to the Max End of Bar position and and measuring from the cut-off tool to the end of the bar pusher. For Swiss type lathes move the headstock to feeding position and measure from the back of the cut-off tool to the end of the bar pusher. This measurement is your minimum remnant length. The remnant length can be up to one part length longer than the minimum depending on home much material is remaining.
3. How do I set my "end of bar" (referred to as "front limit position" on FMB and "max end of bar" on Edge products)?
Before beginning reference (re-zero) the bar pusher. For sliding headstock machines only, move the headstock into overtravel toward the guide bushing. For all machines, move the bar pusher with a collet attached, no material in the channel, forward until the bar pusher collet contacts the lathe collet. Smaller diameter bar pushers may travel inside the lathe collet, larger diameter bar pushers may stop sooner at the back of the collet or at the collet sleeve. Record the position of the bar pusher from the bar feeder screen. Enter the position minus 3mm (1/8 inch) in the Max. End of Bar parameter on parameter page 11. There are two Max. End of Bar parameters on this page, one for Chuck and one for Collet. This is to allow the use of different chucking systems without the need to reset the end of bar setting each time the change is made. The button to the right of the Facing Length button on parameter page 3 selects either the Chuck or Collet setting. Please note that if the guide channel size is changed the bar pusher of the new channel may have a different stopping point in the spindle than the bar pusher originally used to set up the machine. In this case Collet can be set for one diameter channel and Chuck for another.
4. How do I set the "top cut" position (first insert position / facing length)?
The facing position controls where the new bar stops in the lathe during a bar change. The value of the parameter is a measurement of the distance from the facing flag to the face of the guide bushing minus 2 inches for Swiss type lathes. For fixed headstock lathes measure the distance from the facing flag to the face of the collet. Enter the measurement in the Face of Collet or Face of Chuck parameter on parameter page 11. The parameter used, collet or chuck, depends on the selection made on parameter page 3. Press the value button on the appropriate parameter and enter the new number. Press Save All to save the new value. The parameter "Facing Length" on parameter page 3 is used as an offset to extend the facing position farther ahead into the lathe.
6. How do you set the chain/belt tension on my bar feeder?
The drive belt adjustment is made by moving the front pulley of the drive belt by means of adjusting screws that thread into the shaft of the pulley. To make an adjustment to the belt slightly loosen the two locking bolts located on each end of the shaft. Turn the two adjusting screws equal amounts to tighten or loosen the belt. If loosening the belt push on the heads of the adjusting bolts to seat the shaft. Lightly snug down the locking bolts and run the pusher forward and backward to check the tracking of the belt. If the belt pulls to one side loosen the opposite side tensioning screw. When the belt is tracking properly retighten the two locking bolts, alternating between the two in small increments until tight.