It contains four G250 motor drivers, and a breakout board in a hard anodized aluminum case. All motion control firmware is open source and easily modified to support new functions or different mixes of functions. If your motor is rated at 2.8A per phase you will have to use a 2.8K 5% 1/4W resistor. The G540 is a complete 4 axis system which plugs directly into the computer via the parallel port, and to the motors through DB9 connectors. Configurations are available that are compatible with common breakout cards and multi axis step motor drives like the Gecko G540. The resistor is calculated by taking the current in amps and multiplyingīy 1000. Must use a current set resistor across PIN 1 and PIN 5. Wire your motors to the included DB9 solder cup and secure the backshell connectors. Multiplying the square root of the motor’s inductance by 32, as in the example below for a 2mH rated motor: The power supply voltage is determined by Finally have a STEP and DIRECTION pulse source available.Ĭonnect your power supply positive to TERMINAL 11 and negative to TERMINAL 12. The power supply voltage must beĭetermined by the inductance equation listed later or be between 4 times and 20 times the motor’s rated voltage. Proportional loss in torque, meaning a 5A motor will get 3.5/5 (70%) of its maximum torque. Using a motor with a higher current rating will cause a The motor’s rated phase current must be between 0 Amps and 3.5 Amps. The limit of 3.5A is the maximum safe working limit for the stepper driver, I suspect it will actually go a little higher.
They are set up for an output current of 1A per kohm of resistance, so I read it as you need a 3.5kohm (3.3k + 220R in series). "Before beginning, be sure to have a suitable step motor, a DC power supply suitable for the motor and a current set resistor. The instructions for the G540 doesnt say you cant have a resistor so I guess you do need one. As you can see electrics isn't really my strong point but I'm willing to learn The 4th axis motor is 3amps.Ī resistor is required to be inserted into the DB9 conecter on the G540, this depends on the motor amperage, Im not completely comfortable with calculating the required resistor so any advice appreciated. The power supply I have is 48v 12.5amps, I presume this voltage will be ok but does anyone know what the amperage of the motors is. I want to run a Centroid acorn board and a gecko g540, I also have a harmonic drive I want to run as a 4th axis from the Gecko. I have an older triac which I'm upgrading.
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