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28-11-2016 #11
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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28-11-2016 #12
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28-11-2016 #13
Get the 24V PSU and a single PWM controller rated to run all three motors, check the specification of the motors for current draw, you've just referred to the motor ratings as aH (amp hours) which is a battery charge capacity not a motor current draw.
If you don't have one get a multi-meter so you can check voltages and currents once you have something to fiddle with.You think that's too expensive? You're not a Model Engineer are you? :D
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28-11-2016 #14
I might just plump for one of these and a travel adapter and when I have everything working flog it on fleebay again. Super 30V 5A 110V Adjustable Power Supply Precision Variable DC Digital Lab H6TG Or keep it I might want to mess with other stuff later. If it saves me buying the wrong power supply at least that justified the purchase lol
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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29-11-2016 #15
Sure it's OK to run them constantly for hours also, but you need a driver for each and a motion controller also. So it is a bit more complicated. Even if you don't want a driver for each motor, just want to connect all three in parallel it is a fair bit more complicated to do what you are showing in the video.
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29-11-2016 #16
Yes But if you had read the other post http://www.mycncuk.com/threads/10360...t-CNC%29/page2 you would have seen that this has be discussed
..Clive
The more you know, The better you know, How little you know
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29-11-2016 #17
http://hobbycomponents.com/motor-dri...-motor-drivers
But not very complicated as the above linked product has already been suggested, it's as complex a motion controller as is required, as the occasional lost step isn't an issue one pulse generator could be used for all three drivers - Simples! ;-)
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29-11-2016 #18
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29-11-2016 #19
I have ordered or already have everything for the DC and Stepper builds.
They both have merits :
The stepper build linked to an arduino program will be good for taking the roughed out semi-sphere to an unpolished perfect sphere. I can set the program to speedup gradually and shift the rotational direction. More torque is required because it tends to grab when rough.
But it takes more parts and is a more expensive build. You have to have 3 controllers , flexible adapters and chucks.
The cordless drill version is good for the high speed polishing where torque is not a huge issue, it can also be controlled with an arduino and has a built in gearbox / chuck. Its also a cheaper build, 1 power supply and a single controller. Bit more cooling needed if there is no built in fans.
If .. and I say if ! I get them both working I'll do a vid and some pics.
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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29-11-2016 #20
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