JVL MAC050 - Page 23

JVL A/S - User Manual - Integrated Servo Motors MAC050 - 4500 19
2.2 Gear Mode
Example 1: Encoder (quadrature) input.
An external encoder feeds the MAC motor. The I/O type is set to “Pulse
input“ and “Input type” is set to “Quadrature” in order to decode the en
-
coder signal. The encoder is connected to the A and B terminals (Multi-
function I/O’s). See also Multifunction I/O used as pulse inputs, page 116.
The resolution of the external encoder is 500 ppr. The MAC motors
have MAC50-141 = 1024 ppr. MAC800/1200 = 2000 ppr. MAC400,
MAC1500, MAC3000 and MAC4500= 2048 ppr.
If this application requires that the MAC motor rotates 1 rev. each time
the external encoder has rotated 1 rev., the Input parameter is set to 500
(external encoder) and the Output parameter is set to 1024 or 2000.
Now the ratio between the external encoder and the MAC motor will
be 1:1. Ensure the “Profile data” is set to proper values in order not to
limit motor operation unintentionally.
Example 2: Pulse and direction input.
A step motor system is replaced by a MAC motor, meaning that the
MAC motor receives a pulse and direction signal which is a very common
signal format in step motor applications.
The I/O type is set to “Pulse input“ and “Input type” is set to “Pulse-di-
rection” in order to decode the input signal. The pulse signal is connect-
ed to the A terminals (Multifunction I/O) and the direction signal is
connected to the B terminals (Multifunction I/O’s).
See also Multifunction I/O used as pulse inputs, page 116.
The MAC motor is replacing a step motor system with 400 steps per
revolution, which means that when the pulse source produce 400 pulses,
it expects the MAC motor to rotate one revolution.
The MAC motors have MAC50-141 = 1024 ppr. MAC800/1200 = 2000
ppr and MAC400, MAC1500, MAC3000 and MAC4500= 2048 ppr. If
this application requires that the MAC motor rotates 1 revolution each
time 400 pulses are received, the Input parameter is set to 800 since the
MAC motor detects on both the rising and falling edge of the input signal.
The Output parameter is set to 4096 or 8000 since the number of counts
(edges) on the internal encoder is 4096 or 8000. Now the MAC motor
will move 1 revolution if 400 pulses is applied to the pulse input. Ensure
the “Profile data” is set to proper values in order not to limit motor op
-
eration unintentionally. The following table can be used as guide for set-
ting up typical gear ratio:
Pulse and direction gear ratio setup - “Commonly used ratios”
Applied number of pulses
per MAC motor revolution.
Input
register
Output
register
MAC50-141
MAC800
MAC1200
200 400 4096 8000
400 800 4096 8000
500 1000 4096 8000
800 1600 4096 8000
1000 2000 4096 8000
2000 4000 4096 8000
4096 (Same as motor resolution) 8192 4096 8000