This combo of 10 KgCm Torque – Economy motor with Microstepping drive is ideal for small and medium sized CNC machines and robots. When used in CNC machines you can get rapid movement speeds up to 4200 mm/min.

RMCS-1102 is Rhino Motion Controls introductory micro-stepping drive for 1.8deg Bipolar Stepper Motors. It is designed for smooth and quiet operation without compromising on torque and control at higher speeds. It has short-circuit protection for the motor outputs, over-voltage and under-voltage protection and will survive accidental motor disconnects while powered-up.

The RMCS-1102 achieves micro-stepping using a synchronous PWM output drive and high precision current feedback and this is absolutely silent when the motor is stopped or turning slowly. It virtually eliminates stopped-motor heating regardless of power supply voltage.

The RMCS-1102’s closed-loop control gains are calibrated on start-up based on motor characteristics and also adjusted dynamically while the motor is in motion. This control algorithm makes it capable of achieving better torque at higher speeds in comparison to comparable drives in its range.

The PULSE/STEP, DIRECTION inputs are optically isolated. Both inputs work with 2.5V, 3.3V or 5V logic drive signals. The input drive current is 5mA at 2.5V so almost all logic family (74LS, 74HC, etc.) can be used to drive these inputs. Each input provides individual anode and cathode connections to the opto-isolator allowing for multiple input drive interfaces.

Motor Features

  • Step Angle : 1.8 Degree
  • Configuration: 4 wire stepper motor
  • Holding Torque: 10.2kgcm bipolar
  • Rated voltage : 3.3VDC
  • Phase current : 2Amp
  • Resistance/phase: 1.65E
  • Inductance/Phase : 2.2mH
  • Rotor inertia: 275 gcm2
  • Detent torque: 0.36kgcm
  • Length (L): 51mm
  • Weight: 650 grams

Micro-Stepping Drive Features

  • Smooth and quiet operation at all speeds and extremely low motor heating
  • Industrial grade performance for 2-Phase Bipolar, 4-Phase and Uni-polar Stepper Motors
  • Input supply voltage from 12VDc to 50VDC
  • Selectable peak coil current from 0.5A to 5.0A
  • Inaudible 20kHz current chopping frequency
  • Selectable half-current during motor standstill to further reduce motor heating
  • Selectable micro-steps up to 8000 steps per rotation for a 1.8deg stepper motor
  • Higher motor torque and higher speeds achievable due to advanced loop control algorithm
  • 2.5V, 3.3V and 5V compatible PULSE and DIRECTION inputs with 2-wire opto-isolated interface
  • Short-circuit protection for the motor outputs, over-voltage and under-voltage protection
  • LED indication for power and error states
 

Power and Motor Terminal Assignments

  Terminal No.     
      Terminal Name     
Description
Terminal 1
B-
Motor Coil Phase B-
Terminal 2
B+
Motor Coil Phase B+
Terminal 3
A-
Motor Coil Phase A-
Terminal 4
A+
Motor Coil Phase A+
Terminal 5
+V
      Power +Ve (18VDC to 80VDC Max wrt. GND)     
Terminal 6
GND
Power Ground or Power –Ve
 

Pulse and Direction Input Assignments

 Terminal No.     
      Terminal Name     
Description
Terminal 1
ENA-
      Enable (Motor Free)  -Ve optically isolated input     
Terminal 2
ENA+
Enable (Motor Free) +Ve optically isolated input
Terminal 3
DIR-
Direction -Ve optically isolated input
Terminal 4
DIR+
Direction +Ve optically isolated input
Terminal 5
PUL-
Pulse -Ve optically isolated input
Terminal 6
PUL+
Pulse +Ve optically isolated input

Switch Selection Table for Motor Coil Current Setting

Peak  Current     
      SW6     
      SW7     
      SW8     
0.50A
OFF
OFF
OFF
1.00A
OFF
OFF
ON
1.40A
OFF
ON
OFF
2.00A
OFF
ON
ON
2.80A
ON
OFF
OFF
3.30A
ON
OFF
ON
4.20A
ON
ON
OFF
5.00A
ON
ON
ON

Switch Selection Table for Step Resolution Setting

 Steps/Rev     
      SW1     
      SW2     
      SW3     
      SW4     
200
ON
ON
ON
ON
400
OFF
ON
ON
ON
800
ON
OFF
ON
ON
1000
OFF
OFF
ON
ON
2000
ON
ON
OFF
ON
3200
OFF
ON
OFF
ON
4000
ON
OFF
OFF
ON
8000
OFF
OFF
OFF
ON
1600
ON
ON
ON
OFF
6400
OFF
ON
ON
OFF
10000
ON
OFF
ON
OFF
12000
OFF
OFF
ON
OFF
12500
ON
ON
OFF
OFF
12800
OFF
ON
OFF
OFF
16000
ON
OFF
OFF
OFF
20000
OFF
OFF
OFF
OFF

Switch in downward positions is ON 

SW5 ON – Half-Current during Stand-still

SW5 OFF – Full-Current during Stand-still