Multi axis driver power supply

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om_tech_support_MD
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Joined: Wed Dec 05, 2018 1:49 pm

Multi axis driver power supply

Post by om_tech_support_MD » Tue Sep 17, 2019 7:09 am

Question: What size power supply do I need for the multi axis driver?

Main power supply

The main power supply is used to power the steppers. The control power supply is used to power the control board, fan, and other circuitry. We recommend using 2 separate power supplies. One for the main power supply and one for the control power supply. This will give you the ability to check for alarms on the driver in the event power is removed from the main power supply for the steppers.

For the main power supply, we recommend using a 7 amp power supply at 24 VDC +/- 10% or 48 VDC +/-10%. If you wish to use a smaller power supply or are trying to size a fuse, current demand will vary depending on the stepper you have paired with the driver. Oriental Motor recommends using slow blow fuses.

The maximum current the multi axis driver can draw is 7 amps. When sizing the driver, make sure the current draw is an average of 4.0 amps or lower. If you are over 4 amps on average, we recommend adding the MD825B-24L fan to cool down the driver. As a reference only, the maximum current demand of the stepper is approximately 3.5 amps @ 24 VDC and 1.75 @ 48VDC. Actual current demand of the stepper will vary depending on the operating speed, load torque, acceleration torque, cable length, ambient conditions, and other factors. This is important if you plan on moving multiple steppers simultaneously or alternating them one at a time. In the event that you exceed 7 amps, an alarm will generate to protect the driver. Please contact techsupport@orientalmotor and we will assist you in estimating the current demand of a stepper to make sure you do not exceed the 7 amp limit of the driver.
https://www.orientalmotor.com/products/ ... df#page=23



Control power supply

The control power supply is 24 VDC +/- 10% when paired with steppers without a brake and 24 VDC +/- 4% when paired with steppers with a power off activated brake.

For the control power supply we recommend using a 2 amp power supply. This will safely be able to handle the current demand of the control power supply regardless of driver or stepper combination you have. If you wish to use a smaller power supply or are trying to size a fuse, current demand will vary depending on the stepper you have paired with the driver. To calculate the actual control power supply current draw of the specific stepper and driver combination, reference the below specs.

The total current demand for the control power supply is 0.5 amps for the multi axis driver when using the AZM46AK, AZM66AK, or AZM69AK steppers (without a brake) on the 2,3 and 4 axis driver.

When using a stepper with a brake on the 2 axis driver AZD2A-KED, you need a minimum of a 0.66 amp power supply with the AZM46MK stepper. You need a minimum 1 amp power supply with the AZM66MK or AZM69MK.

When using a stepper with a brake on the 3 axis driver AZD3A-KED, you need a minimum of a .74 amp power supply with the AZM46MK stepper. You need a minimum 1.25 amp power supply with the AZM66MK or AZM69MK.

When using a stepper with a brake on the 4 axis driver AZD4A-KED, you need a minimum of a .82 amp power supply with the AZM46MK. You need a minimum 1.5 amp power supply for the AZM66MK or AZM69MK

The fan power supply comes from the 24 VDC control power supply. The Fan will draw up to 0.2 amps. The fan will only turn on if the driver temperature is 5 degrees C below the “driver temperature information” parameter. The factory setting of the “driver temperature information” parameter is 85 C. So, with the factory setting, the fan will turn on at 80C. We recommend changing the factory setting to 50C for applications with an average main current draw above 4 amps.




Should you have any further questions please contact us at techsupport@orientalmotor.com or call at 1-800-GO VEXTA.

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