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Thread: PWM motor controller
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22nd March 2013, 09:07 AM #1
PWM motor controller
Can anyone inform me if this PWM is suitable for a normal stepper motor, and if so, how it would need to be hooked up?
I have often wanted to use a small stepper for various neat little things (such as drawing curtains etc) and wondered about these.Bob Willson
The term 'grammar nazi' was invented to make people, who don't know their grammar, feel OK about being uneducated.
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22nd March 2013 09:07 AM # ADSGoogle Adsense Advertisement
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22nd March 2013, 10:53 AM #2GOLD MEMBER
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Hi Bob,
I'd have to say "no its not"
First question I think someone that knows what they are talking about would ask is "how many wires coming out of the stepper motor?"
Stuart
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22nd March 2013, 12:04 PM #3
4 wires.
Damn, I was hoping it would.Bob Willson
The term 'grammar nazi' was invented to make people, who don't know their grammar, feel OK about being uneducated.
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22nd March 2013, 12:26 PM #4GOLD MEMBER
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22nd March 2013, 12:29 PM #5GOLD MEMBER
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Hi Bob,
I assume you are thinking of using steppers as you have them?
There are controllers for less than $7 but I'm pretty sure you need something else on the front end to tell the controller what to do.
New L298N-Based Stepper DC Motor Board Driver Controller Module Robot Car | eBay
How about one of these?
CNC Manual Handle Controller+LED Display for 5-Axis Stepper Motor Driver Board | eBay
For $60 not only can you drive 5 curtains at varible speed but you also have a display of just how far open they are
Damn, turns out you'd need one of these as well which would add another $90 (I'd thought it was included)
5-Axis TB6560 CNC Stepper Motor Driver Controller Board MACH3+AU Local Shipping | eBay
Are there any specs on the motor for V and A?
Stuart
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22nd March 2013, 12:31 PM #6SENIOR MEMBER
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I'm sure if you hunt around on Ebay you should be able to find a stepper driver with manual pot control. Just make sure it's a "bipolar" driver.
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22nd March 2013, 05:37 PM #7
Well so far, it was just a case of 'wouldn't it be cool if I could'. So there aren't any actual motors yet, although I do have a few lying around from previous failures to complete projects.
I did a few searches for steppers with controller, but everything there seemed to be about +$110.
I may have to give up my dreams of motor driven curtains (or whatever).Bob Willson
The term 'grammar nazi' was invented to make people, who don't know their grammar, feel OK about being uneducated.
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22nd March 2013, 08:52 PM #8
You could try this one: Stepper Motor Speed Pulse Controller and Driver Board | eBay
It has both manual controls for speed and direction - and a jumper to hand control over to a pulse/direction controller (like CNC).
Some personal experience with one of these: works fine, but the heat sink is on the small side and may need a little cooling fan if you go anywhere near the capacity of the board. I guess you know how I learnt thatCheers,
Joe
9"thicknesser/planer, 12" bench saw, 2Hp Dusty, 5/8" Drill press, 10" Makita drop saw, 2Hp Makita outer, the usual power tools and carpentry hand tools...
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22nd March 2013, 09:04 PM #9SENIOR MEMBER
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This thing here will do what you want:
5V DC 2A Driver Board F 9-40V 6-Wire 4-Wire 2-Phase Stepper Motor 2 Control Mode | eBay
You use the on-board buttons to first set the desired speed, and then afterwards, the same buttons control the direction. You also have the option to drive it with a step and direction input from a parallel port or microcontroller.
Edit: Wow, Mr Hovel just found the same board. Mine's cheaper tho
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22nd March 2013, 10:15 PM #10
Thanks to the both of you. Those both look as if they would do the trick. A little on the light side at 2 amps but maybe I need to rethink my size ideas.
Bob Willson
The term 'grammar nazi' was invented to make people, who don't know their grammar, feel OK about being uneducated.
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22nd March 2013, 11:33 PM #11SENIOR MEMBER
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You can get more power out of steppers by upping the volts - that'll allow you to get more RPMs that you can then gear down.
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23rd March 2013, 11:15 AM #12
I placed a bid of $9.90 on the one that you found RustyArc. The most I can lose is that, so if it works then great, if it doesn't then ..... I'll let you know.
Bob Willson
The term 'grammar nazi' was invented to make people, who don't know their grammar, feel OK about being uneducated.
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24th March 2013, 12:45 AM #13
You're a cheapskate Bob!
By the way, the two controllers we found fo you are identical - in case you hadn't realised.
Good luck with your bid.Cheers,
Joe
9"thicknesser/planer, 12" bench saw, 2Hp Dusty, 5/8" Drill press, 10" Makita drop saw, 2Hp Makita outer, the usual power tools and carpentry hand tools...
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24th March 2013, 09:12 AM #14Bob Willson
The term 'grammar nazi' was invented to make people, who don't know their grammar, feel OK about being uneducated.
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24th March 2013, 09:39 AM #15
Bob, do you have any specs on your stepper motor? A sticker maybe? Even coil resistance would help, to determine the power of your motor and whether or not it's capable of the job and if the controller/driver has enough oomph to power it.
A 2A driver won't be gutsy enough for many motors and could overheat or possibly fail very quickly. Even my medium-sized steppers draw more than 2A. (2A is only 10W per coil at 5V). Especially important if you plan to keep one coil energised at times for braking/holding.
As mentioned by RustyArc, you can up the volts from 5V to a bit higher for more power and to allow the motor to be driven at a slightly higher step rate, but again heat can easily become a problem. A motor wih a cast body helps, because it can be attached to a heatsink/chassis to dissipate heat.... Steve
-- Monkey see, monkey do --
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