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Chester Conquest mill power feed

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John Rudd:
Ok,

Things have moved on slightly on the speed control front...

The 555 timer thing is pants...Try as I might I cant get it to control the motor speed at a decent rate...Changing some of the component values makes things worse..

A change of tactic is required...

So, on to a redesign....

Mike K:
Darren, I think John is referring to duty cycle.

Mike

Darren:
Ah yes, that's would be it,

Thanks Mike...


John, do you think that maybe there could be a miss match here between the DC motor and the AC signal you are feeding it?

John Rudd:
Err....probably...My guess would be the inductance of the motor is having some sort of effect.... :coffee:

Darren:
Yes, that sounds plausible,

Do you have a simple dual voltage secondary transformer? If so why not give it a go with just two voltage outputs and switch between them?

I'm sure you know what I'm suggesting, but for others, mains-fuse-transformer voltage in 240V-transformer voltage out 6/12V-rectifier to DC,

The outputs will be slightly higher due to being rectified but close enough. I really don't think the actual speed of the wiper motor is that critical from my exp, just so long as you have a fast and a slow speed for convenience.


I must rig this up sometime and test it in real life as I promised to sort something out for Stew. But I think it will work fine and would be rock solid reliable (unlike fancy electronics)

Just a suggestion.

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