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Thank you for purchasing the G320 drive. The G320 DC servo drive is warranted to be free of manufacturing defects for 1 year from
the date of purchase. Any customer who is dissatisfied with it or is unable to make it work will be cheerfully refunded the purchase
price if the G320 is returned within 15 days of the purchase date.
PLEASE READ FIRST BEFORE USING THE G320:
If you are not familiar with DC servo drives please do the following setup instructions with the motor on the bench before mounting it
on the mechanism it will eventually run. This will allow you to get a baseline motor behavior of what to expect.
Before you start, you must have a suitable encoder mounted and properly aligned on the motor. Follow the manufacturer's
instructions on mounting and aligning the encoder if the motor doesn't already come with one.
Next you must have a DC power supply suitable for the motor. The power supply current rating must equal the maximum current
you expect to run the motor at.
Finally, have a STEP and DIRECTION pulse source available.
Before going on, turn the current LIMIT trimpot a quarter to half of full scale. Turn the GAIN trimpot fully off and turn the DAMP
trimpot to a quarter of full scale. The trimpots are single-turn so be careful not to over-torque them.
G320 PINOUT
TERMINAL 1
Power Ground
Connect the negative (black) lead of your power supply to this terminal.
TERMINAL 2
Power (+)
Connect the positive (red) lead of your power supply to this terminal. It must be between +18VDC to +80VDC.
TERMINAL 3
Armature (-)
Connect the black lead of your motor to this terminal.
TERMINAL 4
Armature (+)
Connect the red lead of your motor to this terminal.
TERMINAL 5
ERR/RES
This is the ERROR and RESET pin. For a full explanation read the section titled "ERROR/RESET PIN" on page
5.
TERMINAL 6
Encoder Ground
Connect the encoder power supply ground to this terminal.
TERMINAL 7
Encoder +5VDC
Connect the encoder +5VDC pin to this terminal.
TERMINAL 8
Channel A
Connect the Channel A pin of your encoder to this terminal.
TERMINAL 9
Channel B
Connect the Channel B pin of your encoder to this terminal.
TERMINAL 10
Direction
Connect the DIRECTION signal to this terminal.
TERMINAL 11
Step
Connect the STEP signal to this terminal.
TERMINAL 12
S/D Common
Connect this terminal to +5VDC.
IMPORTANT: When first testing the G320, connect ERR/RES (term. 5) to ENC+ (term. 7). Please follow the next steps in the
sequence they are given.
G320 BRUSH SERVO DRIVE
REV 7: July 15, 2010
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Summary of Contents for Geckodrive G320
- Page 1 REV 7: July 15, 2010 Thank you for purchasing the G320 drive. The G320 DC servo drive is warranted to be free of manufacturing defects for 1 year from the date of purchase. Any customer who is dissatisfied with it or is unable to make it work will be cheerfully refunded the purchase price if the G320 is returned within 15 days of the purchase date.
- Page 2 The encoder must be a digital quadrature TTL output type that operates on a single +5VDC power supply and the power supply current rating must be less than 50 mA if it is being powered by the G320. It should be at least a 200 line encoder. If the encoder supply current is more than 50 mA, use an external +5VDC supply.
- Page 3 G320 BRUSH SERVO DRIVE REV 7: July 15, 2010 For counter-clockwise position errors the voltage will increase by 0.04 volts for every count until it reaches 9.6 volts when again the protection circuit takes over as before. VOLTMETER MONITORING: Place the red lead on the test point and the black lead on the large blue capacitor lead (GND) furthest from the main connector.
- Page 4 Check the trimpot settings. If they seem right then switch the motor leads and try again. If it still doesn’t work and all the previous steps have been followed, call Geckodrive Support at the number at the end of this document.
-
Page 5: Current Limit
Encoder failure. REVERSING DEFAULT MOTOR DIRECTION: The G320 will turn the motor in the CW direction when the DIRECTION input is “high” (logical “1”, or +5VDC). If instead CCW is preferred, then: Reverse the motor “+” and “-“ leads (TERMINAL 3 with TERMINAL 4) Reverse the encoder “channel A”... - Page 6 The above circuit shows how to implement an external switch to clear an ERROR condition and RESET the G320, while still being able to read the state of the drive. It also includes an optional FAULT LED circuit if a remote indication of the state of the G320 is desired.
- Page 7 G320 BRUSH SERVO DRIVE REV 7: July 15, 2010 2.5000" (63.5 mm) 1.7500" G320 Servodrive (44.5 mm) Cover: Aluminum, Anodised Plate: Aluminum, Hard Anodised Color: Black, Red Text Weight: 3.6 oz (100 gm) Size: 2.5" X 2.5" X 0.825" 2.5000"...
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