DE35-ST Operating Instructions
D292469I 77
• Raising the Pickup by one coarse step increases the pickup load by about 40 g.
and lifts the Pickup by about 12.5 mil.
• For general purposes, use a Pickup load of about 50 g.
• Pickup load is not a critical adjustment as far as the machine operation is
concerned.
• Lower loads may be necessary for fragile die. Higher loads may be necessary
when using a single needle head and large die to counter the tipping tendency of
the die.
Once the pickup height has been adjusted to give the appropriate loading,
press the EJECT TEST key to lower the needles.
Adjusting Pickup Tip Purge (Blow Off)
When the die is placed in the cavity or is in the discard position, the Pickup Vacuum is
turned OFF and the system waits for about 50 msec. for the vacuum line to return to
atmospheric pressure. Immediately after this, a short pressure impulse is applied to the
Pickup Tip to dislodge the die from the tip. To minimize static accumulation at the
Pickup Tip, the Pickup Body is fully grounded. For best performance, the pickup tip
should be made from static dissipating material.
Blow off pressure can be set between 2 and 10 psi. Factory setting will be about 5 psi.
This will prevent silicon dust build up in the vacuum lines. The Blow Off Pressure
Regulator is on the back left side of the machine. The Blow Off Pressure Gauge is visible
through the top of the left machine panel.
The amount of time that the purge pressure is applied can be adjusted from the
keyboard when in Single Step Mode as follows:
1. Press the SINGLE STEP key.
2. Cycle the machine until the message PURGE PICK UP 0.030 SEC.
appears in the display. This is the amount of time the purge air is
turned on. A figure of 0.030 sec. is used as an initial factory setting.
NOTE: This message will appear over the waffle pack and in the discard position
and can be independently set
3. Press the + / - key to adjust the time showing in the display. The purge time can
be adjusted in the range 0.000 sec. to 1.000 sec. The COARSE/FINE key will
change the adjustment increment from .01 sec to .1 sec.
4. Purge Time is stored in memory and any changes will be retained when the
machine is next turned on
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