User`s manual

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DESCRIPTION AND FUNCTION
MANUAL PRESET INDEXER BOARD
The Manual Preset Indexer board utilizes the PI45 Preset Indexer integrated
circuit (I.C.). Functions available are Home, Hard and Soft Limit inputs, two
Homing modes, Jog/Run, Fast Jog and switch selectable Base Speed,
Maximum Speed, Acceleration/Deceleration.
This board includes the necessary buffering and other circuitry for the PI45 chip
that makes indexing easy. The board can be operated manually or with a
Programmable Logic Controller (PLC) to index a set of pulses determined by the
internal count switches or an external count module, such as the AA1760-5 or
similar device.
Indexer board features include:
Internal Index Count switches
Pulse Rates up to 14,792 pulses per second
CW and CCW Home, Hard, and Soft Limit inputs
Adjustable Motion "Complete" output
Motion "Busy" output
Clock pulses and step direction outputs
CW and CCW Index inputs
CW and CCW Jog/Run and Fast Jog inputs
Two "Go to Home Position" modes
TTL-MOS Compatible
Pulse and reset outputs and coincidence inputs for interfacing with a
2 to 6 decade thumbwheel, rotary switch assembly or similar device
MANUAL PRESET INDEXER TERMINAL (P1) DESCRIPTION
PIN FUNCTION DESCRIPTION
1 -HARD LIMIT When active low, this signal instructs the step motor to
halt all motion in CCW direction.
2 +HARD LIMIT Same as -HARD LIMIT except in CW direction.
3 -SOFT LIMIT When active low, this signal instructs the step motor to
ramp down to base speed and complete the move.
Input active during a -Index or -Home function.
4 +SOFT LIMIT Same as -SOFT LIMIT except in CW direction.
5 -HOME LIMIT Used in H0 Homing mode in conjunction with -Soft
Limit. Giving -Home command (active low) causes
motor to ramp to high speed in the CCW direction until
-Soft Limit is contacted. At contact, motor will
decelerate to base speed and run until the -Home Limit
is contacted, at which time the motor will stop.
6 +HOME LIMIT Same as -HOME LIMIT except in CW direction.
7 -JOG/RUN A low level on this line causes the step motor to take
one step in the CCW direction. Normally, the
JOG/RUN inputs are manipulated by external
pushbutton switches. A single depression of the switch
causes a "jog" operation, while holding the switch down
for 0.5 seconds causes a "slow run" condition. This
command may be used with FAST to perform a fast
run at the base speed rate.
8 +JOG/RUN Same as -JOG/RUN except in CW direction.
9 -HOME A low level on this line instructs the step motor to move
to the home position via the CCW direction. (See
HOME SELECT)
10 +HOME Same as -HOME except in CW direction.
11 -INDEX When low, this signal causes the PI45 chip to read the
current motion parameters and number of steps from
the thumbwheel switches and command the motor to
step the indicated distance in the CCW direction. (See
-SOFT LIMIT). NOTE : If -SOFT LIMIT is
encountered during an Index, the motor will decelerate
to base speed and complete the Index.