Gecko G540 4-Axis Stepper Motor Drives

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Gecko G540

Overview

A 50V 3.5A 4-axis stepper motor driver that is meant to be driven by a PC over a parallel port. The newer version also features an isolated VFD PWM output for speed setting.

NOTE: there are at least two major hardware revisions, and the pinouts are different.

Specifications

Input Voltage 18 - 50VDC
Motor Current 0 - 3.5A
Power Dissipation 1 - 13W
Short Circuit Trip 14A
Motor Inductance 1 - 30mH
Step Frequency 0 - 200kHz
Step Low Time 2uS
Step High Time 1uS
Direction Setup Time 200nS
Direction Hold Time 200nS
Signal Voltage 3.3 - 5VDC
Charge Pump Frequency 10kHz

Wiring Diagram

DB25

Pin REV-1 REV-3+
1 Output 1 Output 2
2 A-Axis Direction X-Axis Step
3 A-Axis Step X-Axis Direction
4 Z-Axis Direction Y-Axis Step
5 Z-Axis Step Y-Axis Direction
6 Y-Axis Direction Z-Axis Step
7 Y-Axis Step Z-Axis Direction
8 X-Axis Step A-Axis Step
9 X-Axis Direction A-Axis Direction
10 Input 0 Input 1
11 Input 1 Input 2
12 Input 2 Input 3
13 Input 3 Input 4
14 Output 0 VFD PWM (50Hz)
15 Fault (out to PC) Fault (out to PC)
16 Output 3 Charge Pump (>10kHz)
17 Output 2 Output 1
18-25 GND GND

Screw Terminals

Pin REV-1 REV-3+
1 +5VDC (from PC) Input 1
2 Input 0 Input 2
3 Input 1 Input 3
4 Input 2 Input 4
5 Input 3 Output 1
6 "Disable" Input Output 2
7 Output 0 VFD GND
8 Output 1 VFD Output
9 Output 2 VFD +10VDC
10 Output 3 "Disable" Input
11 +18-50VDC (for motors)
12 GND

DE9

Pin REV-1 REV-3+
1 current setting resistor
2-4 GND [NC]
5 current setting resistor
6 Motor B+
7 Motor B-
8 Motor A+
9 Motor A-

Sources

Page 2 of the REV-1 manual shows the connector pinouts.

Page 2 of the REV-3 manual shows the connector pinouts.

Page 5 of the REV-4 manual shows the connector pinouts.

Page 7 of the REV-8 manual shows the connector pinouts.

Page 3 of the REV-1 manual shows the suggested wiring.

Page 3 of the REV-3 manual shows the suggested wiring.

Page 6 of the REV-4 manual shows the suggested wiring.

Page 8 of the REV-8 manual shows the suggested wiring.

Online Resources

G540 Multi Axis Digital Stepper Drive | Geckodrive

Gecko G540 4-Axis Drive REV-1 (August 5th, 2008)

Gecko G540 4-Axis Drive REV-3 (September 10th, 2008)

Gecko G540 4-Axis Drive REV-4 (August 17th, 2010)

Gecko G540 Multiaxis Step Motor Drive REV-8