However, if you are using Gecko G540 you can narrow this margin as it has over current protection and use stepper motors rated for 3.5A or more. The rule of thumb is to select a driver that can supply 1.4 times the current needed by the motors, this is to protect the driver from high currents due to load fluctuation or hard stops. If you want to use a high torque motor you will need a driver that can meet the current demands of the motor. The torque produced by the motor increases with an increase in current. It can supply a maximum current of 3.5 A to each motor that it drives.įor example, a typical NEMA 23 motor with around 180 oz-in of holding torque would require around 2.8 A current. If you keep the current within the rated values, there shouldn't be an issue.
The only possible drawback is the heat management, and the G540 is extremely well designed to manage heat. Generally, you want to apply a higher voltage to get high torque even at high RPMs. More voltage to the stepper motors translates to a faster rapid speed of the axes. You can use stepper motors with a maximum voltage rating of 50 V.
#Cnc usb controller connecting controller to drivers drivers
G540 has four Geckodrive G250X Digital Stepper Drives, one for each stepper motor that it can control.īefore you get confused, know that the G540 motor controller is actually four G250X stepper drivers rolled into one board. In most other stepper drivers, you need to purchase a stepper driver for each motor you need to control. The Gecko G540 can control up to four stepper motors.
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