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