Section
13
DRILL CHANGE AND DEPTH SETTING
MANUAL TOOL CHANGE SPINDLES TYPE 4025, 4026 AND 4032.
1) Drive mechanics to HOME position and remove TV camera.
2) Unplug the spindle cable and carefully remove the spindle after loosening the two
retaining screws.
3) Position a piece of 0.8 mm laminate under the pressure foot.
4) Operate the HEAD DOWN switch to lower the drill head to its fully down position.
5) Fit the required size drill into the spindle collet with approximately 21 mm protruding.
6) Replace the spindle in the head and gently slide down until the drill tip is just touching
the 0.8 mm laminate. Ensure that the spindle cable exit is aligned at approximately
45 degrees to the pressure foot rods (as shown below) in the case of the 4025 spindle,
and re-tighten the two spindle retaining screws.
7) Re-connect the spindle cable and release the head down switch.
The drill fully down position (HEAD DOWN switch) is now set to 0.8 mm above the bed of
the machine and a backup material of greater than 1.6 mm should be used to ensure that the
drill will pass completely through the circuit board. For large diameter drills (above 2 mm)
the backup material thickness should be increased unless the drills have flat tips.
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