adccommunitymod (AutomationDirect) asked a question.
Stepper Motor Operation Voltage
Created Date: November 19,2007
Created By: AGomaa
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I wander if I miss the recommended operating voltage for the stepper motors from the documentation. The power supply that goes with the stepper motor and the driver from ADC provides 35 VDC for the motor I am building the driver that would power the stepper motor and I would like to know what voltage range I can use.
Created Date: November 20,2007
Created by: shoupdaddy
There's a little Drive Block Diagram in the catalog that shows the voltage input to the AA drive as 12-42vdc (which would be the same for the motor). One of the disadvantages is your going to loose more torque at a higher RPM with a lower voltage and the motor will stall.
Created Date: November 20,2007
Created by: AGomaa
I can see this however the 42 VDC is the limit of the driver output IC (like L298). The power supply that is sold as complementary to the stepper motor is 35 VDC. The driver will chop this voltage but up to what?. So I assume that motor can run with 35 VDC but I wander if this is correct and if I use 24 VDC what is the expected torque
Created Date: November 20,2007
Created by: shoupdaddy
If you go to www.geckodrive.com click on the link labeled SUPPORT then click on the link called STEP MOTOR BASICS. They give you some charts showing you torque vs. voltage. If you need the torque at a high RPM then you need the higher voltage. I use Anaheim Automation drives because the voltage input is 20 - 80 vdc. Hope this helps.
Created Date: November 20,2007
Created by: AGomaa
Many thanks, this is my spare time engraver project so I am working to get the cost as loooow as I can, that is why I'm building the driver etc. The driver I buit is working fine but it is only 2 amps. I'm building 3.5 A one.
Created Date: January 08,2008
Created by: Adisharr
The higher the voltage, the faster the rise time through the motor inductors hence the improved speed.
Don't worry about the motor's voltage if your using a chopper drive, just make sure the drive itself can handle the power supply voltage. You'll need to adjust the drives current output a value at or under the motors rated current. Most chopper drives have a POT to do this (both holding and running currents).
Created Date: January 08,2008
Created by: AGomaa
Thanks Adisharr,
I will test with the power supply that I have (28V) and if not enough I'll use higher up to circuit limit
Created Date: November 19,2007
Created by: AGomaa
I wander if I miss the recommended operating voltage for the stepper motors from the documentation. The power supply that goes with the stepper motor and the driver from ADC provides 35 VDC for the motor
I am building the driver that would power the stepper motor and I would like to know what voltage range I can use.