Pacific Scientific 6410 Stepper Driver

Parameter Setting and Debugging

5.1 DIP switch S1 and jumper J6

S1 is an 8-bit DIP switch located inside the driver (requires opening the casing to make contact, but the manual indicates the position). The functions of each position are as follows:

Position 1-3: Together with J6's 3-4, it determines the step subdivision (as mentioned earlier).

Position 4: Digital electronic damping enabled/disabled (ON=disabled? Attention manual description: It is enabled when the default position is "open", but usually the switch identification may be reversed. In practical applications, it is necessary to operate according to the manual table.

Position 5: Idle current attenuation control (in conjunction with J6 7-8).

Position 6-8: Motor current selection, with a total of 8 levels: 5.0, 4.375, 3.75, 3.125, 2.5, 1.875, 1.25, 0.625 A RMS.

The J6 jumper group is located on the circuit board and provides the following options:

1-2: Enable (install) or disable (remove) the stepper input filter.

3-4: Decimal step subdivision mode (installation) or binary subdivision mode (removal).

5-6: Enable polarity (remove=enable suspended; install=enable driver).

7-8: Idle current decay delay (in conjunction with S1-5: when J6 7-8 is installed, S1-5 closed=ICR disabled, S1-5 open=ICR enabled delay of 0.1 seconds); When J6 7-8 is removed, S1-5 closes with a delay of 0.05 seconds and opens with a delay of 1.0 seconds.

5.2 Power on testing process

Before the first power on, the motor shaft should be disconnected from the load to prevent accidental movement caused by wiring errors. Check the factory settings of S1: Step subdivision 1/25, digital electronic damping enabled, idle current attenuation enabled, current 5A (if the rated current of the motor is low, it needs to be lowered). Check the factory settings of J6: ICR enabled (0.1 second delay), enable floating enabled, decimal subdivision mode, and step filter enabled. After connecting the power supply, rotating the motor shaft by hand should feel the holding torque. Then apply a step pulse, and the motor should rotate smoothly. Change the polarity of the directional signal, and the direction should be reversed. If the motor does not rotate or the torque is abnormal, check the enable status, current setting, and wiring.

5.3 Troubleshooting

When the motor has no torque and the "Enabled" output is high (indicating a fault), possible reasons include: short circuit of the motor winding, bus overvoltage, and abnormal internal low-voltage power supply. Firstly, disconnect the motor cable and power it back on. If the fault is resolved, check if there is a short circuit between the motor cable and the motor itself. Next, measure whether the power supply voltage is between 24-75V and there are no transient spikes. If the motor has torque but does not rotate, check whether the STEP signal meets the timing requirements (direction establishment time, step pulse width, etc.). Turning error can exchange the phases of A and A ̅. If the position is inaccurate, it is necessary to confirm that the subdivision settings are consistent with the upper computer, and check if there is any step loss (you can try increasing the power supply voltage, enabling digital electronic damping, or reducing acceleration).

Summary of Technical Specifications

Parameter values

Input power supply 24-75 Vdc, maximum 5A

Output current (RMS) 0.625, 1.25, 1.875, 2.5, 3.125, 3.75, 4.375, 5.0 A (optional dialing)

Chopping frequency is about 20 kHz

Step resolution (with decimal jumper) Full step, 1/2, 1/5, 1/10, 1/25, 1/50, 1/125, 1/250

Step resolution (without decimal jumper) 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256

Maximum step frequency filter enabled: 500 kHz; Disabled: 2 MHz

Step/direction input current STEP: 5.5-10 mA; DIR/ENABLE：3.0-4.5 mA

Isolate all input and output optocouplers

Enable response delay of approximately 500 ms

Idle current attenuation drops to 50%, with a delay of 0.05/0.1/1.0 seconds optional

Working environment temperature 0-50 ° C (ensuring chassis ≤ 60 ° C)

Storage temperature -55 ° C to+70 ° C

Humidity 10-90%, no condensation

Weight approximately 1.0 lb (0.45 kg)

Certified UL 508C, CSA C22.2 No.142

CE compliant installation points

For applications that require compliance with the EU EMC Directive (89/336/EEC) and EN61800-3 standards, the 6410 driver must be installed in accordance with the requirements of Appendix D. The basic principles include: installing the driver on a conductive machine chassis (removing the coating if necessary to obtain good high-frequency grounding); The motor cable uses shielded twisted pair and the shielding layer is connected to the protective ground through a 360 ° clamp; The shielding layer of the signal cable should be grounded through the conductive shell of the D-sub connector; Suitable EMC filters (designed by the user) need to be installed on the power input side; All cables should be kept away from sensitive signal lines such as telephone and communication lines. Pacific Science provides application notes AN106 and AN107, which respectively introduce methods for reducing drive line noise and radiation emissions.