74 CHAPTER 8: OPERATION
TRYTON 107/112
4.4. End of bar position
The end of bar position determines the moment when the bar feed turns
on the end of bar relay R3.
Usually, the end of bar position is adjusted a part length (total amount of
material needed to make one part including cut off and facing) behind the
clamping system of the lathe.
The end of bar should be adjusted each time the part length changes.
The length of the remnant may vary :
• The minimum remnant length (Min) is obtained when the feeding
pusher is just behind the clamping device while the last part is being
machined.
• The maximum remnant length (Max) is obtained when there is not
enough material for machining an additional part (Lp - 1 mm).
Maximum remnant length = Lp - 1mm + Min
4.4.1. Adjustment
Move the lathe headstock to the start or regrip position.
• To the rear of the bar-feeder, undo the fixing screw (A) holding the
end-of-rod probe support (SQ8).
• Slide the support (B) backwards (2) as far as it will go.
• Place the barfeed in manual mode and advance the pusher forward to ½" behind the headstock collet
with the lathe headstock in the start or regrip position.( Note: if machining a multiple grip part calculate
the end of bar based on the total amount of material needed to make one part.)
• Once the pusher is in position behind the lathe collet slide the switch forward (1) until the indicator
illuminates on the end of bar switch.
• Fix in that position.
• Draw back the pusher then advance it again to ensure that it stops in the set position.
.
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