More information about Stepper Motor Driver SMD73 and SMD74
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The Driver SMD73 can supply up to 3.0Amp RMS in each phase, and current is automatically regulated to a lower current when the motor is not receiving step pulses.
The Driver SMD73 can be powered from an 18 – 28VDC supply and SMD74 18-48VDC. It is equipped with 2 indicators: a green LED indicates that power is on and a red LED indicates an error condition.
For other applications, the Driver is available with step resolutions of 1/1, 1/2, 1/4, 1/5, 1/8 steps/rev., and with selectable motor current by changing a resistor.
SMD73 can handle up to 50 ksteps/sec and a "half-step” current regulation ensures that the current is increased by a factor of 1.4 in order to yield maximum motor torque.
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The Driver is equipped with an 8-pole connector. 4 terminals are used to connect the motor, 2 are used for the external power supply, and the remaining 2 are used to control the motor via step-pulse and direction signals.
Stepper Motor Driver can also be configured by JVL to control DC- or step motors at selectable velocity, stand-by/operating current, change of direction, etc. For example, it is possible to control a DC motor so that input 1 selects start/stop and input 2 determines velocity. Please contact JVL for more information.
SMD74 are a new improved driver based on SMD73 design and shape.
SMD74 offer:
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Technical information about SMD74:
| 4pin connector ( type B4B-ZR-SM4-TF) |
SMD74 Test point on the PCB. |
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| Pin | Function | Pin | Function | |
| 1 | NC | TP1 | Error led anode | |
| 2 | Enable input. 1Kohm to Gnd. Max 3,3V. Motor ignore pulses when active high. | TP2 | Power led anode | |
| 3 | Error output. 3,3VDC. Active parallel with ERROR LED. | TP3 | 3,3VDC | |
| 4 | Gnd | TP4 | 12VDC | |
| TP5 | Start up circuit | |||
| TP6 | 4,25 Mhz | |||
| TP7 | Reset | |||
JVL A/S Bregnerødvej 127 DK-3460 Birkerød Denmark
Tel: +45 4582 4440 Fax: +45 4582 5550 E-mail: jvl@jvl.dk
Tel: +45 4582 4440 Fax: +45 4582 5550 E-mail: jvl@jvl.dk
