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cause some movement and DOES result in a minimum dispense. Add 5 to
this time period and enter as the lag time. Lag times that are too
short can cause problems. That is why the MINIMUM lag time determined
above should be increased by 5 as a safety factor.
These numbers are preset at the factory for the equipment we have
supplied. When a dispense of only a few grams is required, the _LA
number is very important. Too small a lag time will result in no
dispense at all because of inadequate time for the device to operate.
Too large a number may result in over dispenses when very small amounts
are called for. Since too small a number may stall the process, always
add 5 to the minimum as a safety.
Typical LAG TIMES are: (minimum time plus five)
12 - for an AC motor being powered through a relay.
20 - for a 1" air cylinder sliding a dispense valve.
127 - for a automatic speed controller.
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_PO (for Micro Pulse devices only)
_PO sets the ON and OFF time of the specified device during the
time period that the device is operated. This results in a "pulsed'
output. This is used in combination with a "micro pulse" equipped
slide gate. Set to 00000 for normal operation. Set to 00101 for
pulsed operation. The first three digits (001xx) controls ON time in
tenths of seconds. The last two digits (xxx01) controls OFF time.
Larger numbers produce slower dispense rates without any increase in
accuracy. Smaller numbers may not allow enough time for the slide to
shift fully.
Pulsed Output may also assist in dispensing regrind and some powders
when these materials tend to bridge. A parameter of 00501 will produce
a 1/2 second open time (5/10 seconds), a long enough time to allow a
significant dispense, followed by a 1/10 second close time, just enough
to close the gate fully. The rapid gate movement may help in keeping
material flowing.
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For the KEYSTROKE SEQUENCE to change PARAMETERS, see the last page of
the PARAMETER section.
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