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21-11-2016 #11
I have the 3A with reverse switch but I order one of these below at 10A to test. I would like to link some sort of LCD RPM display onto it .. guess thats for later.
http://www.ebay.co.uk/itm/12V-40V-10...4AAOSwuAVWxZvG
Features:
Control the speed of a DC motor with this controller.
High efficiency, high torque, low heat generating.
With reverse polarity protection, high current protection.
Working Voltage: DC 12V - DC 40V.
Control Power:0.01 - 400W.
Static Current:0.02 A ( Standby ).
PWM Duty Cycle:10% -100%.
PWM Frequency:13 KHz.
Material: Plastic, metal.
Size:6cm x 7.5cm x 2.8cm
Weight: 70gLast edited by Fivetide; 21-11-2016 at 05:05 PM.
Fiction is far more plausible when wrapped around a thread of truth
Nothing great was ever achieved without enthusiasm.
Ralph Waldo Emerson
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21-11-2016 #12
That unit is for DC motors, I thought you had steppers !
Last edited by cropwell; 21-11-2016 at 07:29 PM.
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21-11-2016 #13
Fiction is far more plausible when wrapped around a thread of truth
Nothing great was ever achieved without enthusiasm.
Ralph Waldo Emerson
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21-11-2016 #14
Nope, you need a stepper driver.
It's perfectly possible to drive the step/dir signals into multiple drivers - probably preferable to driving potentially unmatched motors in parallel (and offers a choice of multiple supplies if the load becomes an issue), but its a cost balance for your solution.
FWIW - the motors you spec'd - 2A per phase, I guess 2 phase - that's potentially 4A per motor holding current, so you have to be very aware of driving these in parallel.
Speed and direction control are then determined by the state of the dir signal (CW or CCW) and the frequency of the Step line. You could knock up a speed controller using an Arduino Uno or similar and a few lines of C code, and for relatively little extra cost have a full digital control set-up. Happy to give you more info if you want.
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21-11-2016 #15
Fiction is far more plausible when wrapped around a thread of truth
Nothing great was ever achieved without enthusiasm.
Ralph Waldo Emerson
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21-11-2016 #16
It's a motor where energising multiple windings sequentially results in movement, the stepper driver deals with this, just applying DC or even PWM DC will not run a stepper motor, try it ;-)
Having control of precise steps allows you to use a frequency generator to create a precise RPM
You could just use conventional DC motors with a PWM driver but you will find you have some variation of speed with identical motors driven from a common supply.You think that's too expensive? You're not a Model Engineer are you? :D
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21-11-2016 #17
DAMN ! I just want a analogue driver/supply turning all three motors at (approximately) the same speed in a single direction lol
Right then.. 3 of those stepper motor controllers that are all wired to a big pot ? ( I have a box full of big to little Pots )
Plus about 5 shelves of laptop power supplies of every variant I can name !!
I will do this ... it wont bloody beat me ..!! :)Last edited by Fivetide; 21-11-2016 at 11:25 PM.
Fiction is far more plausible when wrapped around a thread of truth
Nothing great was ever achieved without enthusiasm.
Ralph Waldo Emerson
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How about 3 of these for playing with http://www.ebay.co.uk/itm/like/30119...0865095&crdt=0
Plus what Rob selected http://www.ebay.co.uk/itm/Stepper-mo...c=1&rmvSB=trueLast edited by Clive S; 21-11-2016 at 11:42 PM.
..Clive
The more you know, The better you know, How little you know
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21-11-2016 #19
Clive - Nail - On Head!
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21-11-2016 #20
Fiction is far more plausible when wrapped around a thread of truth
Nothing great was ever achieved without enthusiasm.
Ralph Waldo Emerson
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