Tech Tip: How to Choose and Use Stepper Motor Power Supplies from AutomationDirect
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- เผยแพร่เมื่อ 3 ส.ค. 2016
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(VID-MC-0033) - Learn how to choose the right power supply for your stepper system. Includes discussion on linear unregulated and regulated supplies
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**Prices were valid at the time the video was released and are subject to change.
Related AutomationDirect.com part numbers: STP-PWR-3204, STP-PWR-4805, STP-PWR-4810, STP-PWR-7005 - วิทยาศาสตร์และเทคโนโลยี
All yours short videos are the most useful resource on TH-cam for the cnc world. Idk why they are not so popular.
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Thank you for this teaching.
Thanks! Did you know that we have over 1000 Automation Videos here: www.AutomationDirect.com.Videos. Check it out!
Thanks for interesting explanatory.
I would like to ask you about 2/3 rule.
If my motor current is 2.8A, i would count that 3 of them needs 2,8x3=8.4Amax
But as i understood you are saying that ill need 2/3x(2.8)x3=5.6A to run whole system?
thanks
Correct - but keep in mind that is a general rule of thumb. It really depends on how hard you will be driving your system. But in general and most of the time, the odds of all of your drivers using max current all at the same time is VERY small, so most of the time 2/3 Power supply will be more than enough.
You can't go wrong with 8.4A, but the odds of actually needing that much current is really slim.
What about maximum length of wire runs from the power supply to the stepper motor drivers, and then also the maximum length of wire runs from the stepper motor drivers to my NEMA 34 motors? I have an unregulated supply and am using 4 TB6560 motor drivers. Thanks.
Hi Jeff,
We don't sell/support the TB6560 Driver so I can't give you a specific answer. But, in general, the more important questions are:
1. Power Supply: What gauge wire are you using between the power supply and the driver? For our systems we recommend 18 to 20 AWG.
2. Is everything properly grounded?
3. Cables between the drive and motors - Those are current signals so they can be fairly long. We sell cables dedicated for that connection up to 20 feet, so you can probably assume at least 20 feet.
4. Are you using an EMI filter between the power supply and the drive (required by CE).
Hello sir, i am not much into electronics but I need to design power supply system for steppers of my robotic arm.
The motors are nema 34 (12nm and 8.6nm)
So can I power them with 48 volts 15 amps SMPS. The driver wouldn't burn due to excess current right. And each stepper will draw the required current that is 5,6.5 amps
Right, the motors/driver will consume as much current as they need as long as the system power supply has it to give. Just make sure your driver is rated for 48 volts.
HI, if you can help me in calculating the electrical input and mechanical output powers and the efficiency of stepper motor
Thanks for watching Jamal. For technical questions like this, please contact our free award winning tech support. They are setup to give you the most efficient and quickest support.
Phone: 1-800-633-0405
Email: www.automationdirect.com/adc/Form/User/TechInquiry
Support: support.automationdirect.com/
Please let us know if you have any other questions!
Thanks, AutomationDirect
Dear sir, I have a power supply which is 12volt and 30 Amps. I need to run Nema 23(3Amps each) 6 stepper motors. Will this power supply be OK for my work?
Please sir, reply me. I will be grateful to you?
MD, Mubarak Hossain, It could possibly be enough for your system. There are a few factors, that you will need to research on your end. Is this a regulated or unregulated supply, is it a switch Power supply, will it provide enough current for all the motors to start up.
I would place an ammeter on the system and try to run the motors. See what kind of draw you get from your supply.
Thanks
Thanks a lot sir for your reply and help.
Sir could you help me on how to select the SMPS (voltage, current values) for nema 17 and nema 23 for my project what will be the case if I use more than 2 stepper motors in my project....
Reply me sir...
Choosing a Stepper Motor Power Supply depends on the load that the motors have to drive and the specs of the stepper motor and motor controller. If you are using AutomationDirect stepper systems, Appendix C of this document shows you step by step how to figure that out: cdn.automationdirect.com/static/manuals/surestepmanual/surestepmanual.pdf
@@automationdirect thank you sir
I have a polulu stepper motor with a lead screw preattached to it, i used a battery holder with 8 AA baterries 1.5V each but instead of turning it vibrate instead. Is it because of my power supply? Should i used another type of power supply?
@The Concheror, it sounds like your stepper motor is in stall. Usually this is a sign that the load is bound up, or that you do not have enough power supplied to turn the motor. I would first remove the load from the motor and test again. More than likely, you do not have enough amps supplied to the motor to turn the load.
@@automationdirect im going to buy a power supply of 12V with 2.5A do you think it will be enough for it to turn?
@@theconcheror5691 It is difficult for us to say without knowing more about your system. Which stepper drive are you using? How much load do you have? etc. It might be easier to contact our free technical support, they will be happy to help you with any AutomationDirect parts you are using.
Why does the motor controller need a 5 volt supply and is it a good idea to use the same 5 volt supply to supply the motor controller and the break out board, seems like there is opportunity to fry your expensive stepper circuit and break out board? I would think 2 separate 5 volt supplies could be used but I am not sure why the motor controller needs a 5 volt supply in the first place?
Using two separate 5V supplies is not a problem - all depends on your application and how you want to set things up. As to why the motor drive uses 5Vdc? It probably uses TTL logic levels.
I but the scale image 50 cm .but the setpper mottor walking distance 46 cm .why?
Hi Khaled, Double check the pitch of your lead screw and re-check your math. Sounds like something is off w-somewhere ...
Stepper motor power supply selection video.
Hi John, Not sure what you are asking here ...
I am working on a 6dof robot arm assignment for university. I have to design my own 12V power supply as well as the 6dof robot using 6 nema 17 motors and an arduino mega along with multiple other sensors. After reviewing the datasheet of a nema 17, I had seen that the phase current of the motor is 1.5 Amps, thus using the 2/3 rule I would need a power supply at least greater then 6 amps for my 6 nema motors alone, is this correct?. Also taking in to consideration the arduino that will be connected in parallel to the motors to use the same 12V power supply, would a 10A power supply be enough for the job, or is this too big or maybe even too small?
Hi Chris, You are on the right track, but not quite there.
Yes, your DRIVE needs to OUTPUT ~10A to the motors. You need to look and see what voltage the DRIVE is outputting. Suppose it is 5 volts. So your motors need 5V x 10A = 50Watts.
The power INTO the drive is at 12V, 500W so you need a 42A 12VDC supply. Which is why you see most CNC machines use 36 or 48 or 70 power supplies. It reduces the current to a reasonable level.
Does that help?
Oops! I slipped a decimal point (5V x 10A = 50 Watts, not 500W), so you need a 4.2 Amp 12V supply in the example I gave.
@@automationdirect Thank you so much so much for the reply it really did help. I just want to figure out my output voltage of my driver. If I use the 12V power supply connected to each of my drivers, will the output voltage of the driver also be 12V or will the output be the 5v from the arduino if I am using a A4988 driver with a Vmotor of 12V from the supply and a Vlogic of 5V from the arduino.
Good
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I hear Sal Khan from Khan academy.
Nope, not Sal, but they do sound similar!
Each stepper motor connect with separate power supply or 15v power supply connect all steppers
3axis
You can do either, just have to size the power supply appropriately.
15v power supply enough for 3axis stepper motor????
Watch from From 2:00
Yep, that pretty much nails it.
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Thanks for interesting explanatory.
I would like to ask you about 2/3 rule.
If my motor current is 2.8A, i would count that 3 of them needs 2,8x3=8.4Amax
But as i understood you are saying that ill need 2/3x(2.8)x3=5.6A to run whole system?
thanks
Correct - but keep in mind that is a general rule of thumb. It really depends on how hard you will be driving your system. But in general and most of the time, the odds of all of your drivers using max current all at the same time is VERY small, so most of the time 2/3 Power supply will be more than enough.
You can't go wrong with 8.4A, but the odds of actually needing that much current is really slim.