CHAPTER 8: OPERATION 8-19
ALPHA 538/552
6. AUTOMATIC CYCLE
The barfeed autonomy is depending on the bar stocks placed by the operator on the loading ramp. This
task can be performed at any time in the production cycle.
Every time the automatic cycle is to be started, it is recommended to check following points:
· On the loading ramp, standard bar stocks (1200 mm to 3200 mm) must be against the rear limiter.
In the case very short bar stocks must be loaded (min. 700 mm), place the bar stocks in the
middle of the loading ramp; make sure they will be loaded in the remnant extraction device without
falling in the remnant tray.
· The guiding element must be adapted to the bar stock diameter.
· The pusher must be adapted to the bar stock diameter, to the guiding element diameter and to the
spindle inner diameter (including spindle liner).
· The pushing force must be adapted to the bar stock material.
· On the lathe, the clamping device must be adapted to the bar stock diameter.
6.1. New loading bar stock
1. The bar stock on magazine is loaded using the cylinder loading into the guiding elements.
The pusher is in back position, lifted up and the pusher holding system is open.
2. The loading finger moves forward and pushes the bar stock in measuring position. The bar length
is measured.
3. The loading finger goes on to maximal forward position and inserts the bar stock in the spindle.
4. The loading finger moves back to maximal back position.
5. The pusher moves down in working position.
6. The pusher moves forward to the bar stock and finishes the positioning in clamping position (top-
cut).
7. The lathe’s clamping device closes.
6.2. Part feed out
8. The pushes moves back by the selected value.
9. The automatic cycle starts, the parts are machined.
To each clamping device opening, the pushes moves forward, positions the bar stock for the next
part, then moves back by the selected value.
6.3. Remnant extraction
10. The cycle goes on until end of bar signal is given. At this point, the lathe enters a sub-program
and the pusher moves to remnant switch (SQ12)
11. The extraction system clamps the material and the pusher goes in home position.
12. Once the pusher in home position, the extraction system opens and the remnant falls in the tray.
13. The pusher moves up.
7. POWERING OFF
Before handling the bar feeder, stop the lathe at the end of part cycle!
When powering off the barfeed, make sure the pusher is in reference position, lifted up
and no bar stock is present in the guiding element.
To power down, turn the switch to the left, to the 0off position.
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