Chapter 3:
Sure
Step
TM
STP-DRV-4035 Microstepping Drive
Sure
Step
TM
Stepping Systems User Manual
3–2
5th Ed., Rev. B 01/2019
Features
• Drives sizes 17 through 34 step motors
• Pulse width modulation, MOSFET 3 state switching amplifiers
• Phase current from 0.4 to 3.5 amps (switch selectable, 32 settings)
• Optically isolated step, direction and enable inputs
• Half, 1/5, 1/10, 1/50 step (switch selectable)
• Automatic 50% idle current reduction (can be switched off)
Block Diagram
Optical
Isolation
Step+
V+
V–
Step–
A+
A–
B+
B–
Dir+
Dir–
Enable–
Microstep
Sequencer
Current
0.4 to 3.5
A/Phase
Steps/Rev:
1/2, 1/5,
1/10 or 1/50
50% Idle
Current Reduction
Self Test
MOSFET
Amplifier
Logic Connections
from PLC or Indexer
Connections
to Bipolar
Step Motor
Connect to
Power Supply
(12 - 42 VDC)
STP-DRV-4035
