Applied Motion 1035D - Manual (Page 8)

Selecting Between Full and Half Step Operation
-8- -9-
Idle Current Reduction
The 1035D includes a feature that automatically reduces the motor current by 50%
when the motor is not moving. This is known as idle current reduction.
The idle current reduction is not adjustable by the user. However, for qualifying
OEMs, we can change the amount of current reduction during the manufacturing
process. This is accomplished by changing the software in the sequencing chips.
These chips are socketed, so units can be retrofitted if necessary.
For special options please call the factory.
Setting Phase Current
Before you turn on the power supply the first time, you need to set the driver for the
proper motor phase current. The rated current is usually printed on the motor label.
For a list of recommended Applied Motion Products motors and their rated current,
see page 10.
The current for each axis is set independently by trimpots located on the front panel
of the 1035D. The sketch below shows how to set the trimpots.
The 1035D is shipped from the factory in full step mode. This
results in more torque at low speeds than half step mode. Full
stepping also allows you to achieve higher speeds than half
stepping if the speed of your pulse source is limited. For
example, to drive a motor at 25 rev/sec in half step mode, you
must supply step pulses to the 1035D at a rate of 10,000 Hz. To
get 25 rev/sec in full step mode, only 5,000 pulses/sec are
required.
Half stepping is smoother and quieter than full step, so you
should use half step mode whenever posssible.
To change a 1035D to half step operation, remove the black
jumper located next to the power supply connector. You may
need a pair of small pliers, tweezers, or someone with sharp
fingernails to remove the jumper.
Removing the jumper sets
both axes to half step mode.
Custom software is also available for 1/4 stepping, which provides more precise
positioning and smoother motion than full and half stepping.
For special options please call the factory.
3362
0.8A
0.9A
1A
0.7A
0.6A
0.5A
0.3A
0.4A
0.2A
0.1A
0
1035D current setting
(shown at 0.5A)
remove
jumper for
half step
1035D
NAiS FP0 PLC
Connecting Aromat (NAiS) Model FP0 PLC
DIR1
COM
STEP2
DIR2
+
24VDC
Power
Supply
–
STEP1
Y2
+
Y1
Y3
–
Y0