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SwarfnStuff:
Still looking good Shipto.
Yep, a tad fast, the horses would be well giddy if not almost in orbit at the current speed. Still, you will have the speed in hand once the new slower motor arrives.
I think a suitable power supply might be the go too, guess it has to run motor plus lights and Arduino so a bit of thinking there for you.
Looking forward to the next installment, the beauty of being retired is being on permanent holidays.
:scratch: Hmm hang on, Wednesdays = club meetings, Mondays usually set aside to keep the medical profession in work, Fridays of the school year = take the 7yr old grandson to swimming lessons.
Then there is the inevitable, fix this please from SWMBO. :doh:
Oh well, I do get to play in the playpen in between and one day I just might finish something useful.
Congrats on the progress.
John B
AdeV:
I can't see the video, unfortunately, due to geographical restrictions (the Great Firewall of China)... but, how are you controlling the speed of your motor? If you've been using a variable resistor & dropping the volts to the motor, then you'll find that if you control it via Pulse Width Modulation from the Arduino, you can run at a MUCH lower speed before it stalls; because the PWM supplies full voltage, the motor is much better able to overcome the "stiction" which would otherwise afflict it at very very low speeds...
As it happens you've already bought a slower motor, but maybe this is something to consider even with the new motor.
Personally, I'd use the arduino's PWM output to drive a transistor to drive the motor, with all the usual reversed diode surge protection on the motor to prevent it from frying your transistor and/or arduino.
shipto:
In the video you cant see unfortunatly (dont know if I can fix it or not I will check the settings) the motor was running direct from my variable power supply at just shy of rated voltage but any lower and it would stall. I may have been able to get the speed down with the pwm from the arduino but decided on the whole to go for a uprated motor as they where so cheap 24v 12rpm for under £10.
As it happens I am using exactly what you say arduino-transistor-motor I have a tip142 in place so the surge diode is built in
AdeV:
--- Quote from: shipto on January 24, 2017, 05:26:06 PM --- (dont know if I can fix it or not I will check the settings)
--- End quote ---
No, it's the Great Firewall of China blocking the whole of YouTube (also: Photobucket, Flickr, anything to do with Google, and several others).
--- Quote from: shipto on January 24, 2017, 05:26:06 PM ---... decided on the whole to go for a uprated motor as they where so cheap 24v 12rpm for under £10.
--- End quote ---
Well, at that price, it'd be rude not to!
I got a 12v 1-100rpm geared motor from eBay for some similarly low price. Actually, I could do with finding some of these suppliers... I guess postage must make up the bulk of the cost from China, so I should be able to buy locally for pennies, slip 'em into my suitcase for the flight home, and billy-bob's your uncle :)
Noitoen:
--- Quote from: AdeV on January 25, 2017, 03:47:42 AM ---
No, it's the Great Firewall of China blocking the whole of YouTube (also: Photobucket, Flickr, anything to do with Google, and several others).
--- End quote ---
I think you could work around this problem if you have a pc running back home (UK I suppose). Use something like Teamview and see the video and other stuff through that. Our company used to have YouTube blocked on their network and this is how we did it.
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