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Abstract VR8's |
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J Arthur Rank 
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Joined: 06 February 2008 Location: United Kingdom Status: Offline Points: 183 |
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 Posted: 13 January 2009 at 2:20pm |
 Anyway, one stepper motor not working on the tilt, seems to be jamming. Tried to get the mirror off to open it up and see why......one broken mirror.! With my clumsy thick fingers, i also managed to knock a couple of pins of the IC's when i was checking the board for any problems.  So now i need a new mirror, a stepper motor - (abstract want £37.50 plus VAT just for this) and a new IC chip for pan tilt.... Looks like i'm going to have to make do with 3 for the time being! |
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mk2_ginger_biscuit69
Old Croc 
Joined: 03 November 2008 Location: Brighton Status: Offline Points: 7801 |
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Posted: 13 January 2009 at 7:02pm |
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abstract vr8'rs at home on sound to light 4head mode
abstracts in use
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chris_k
Young Croc 
Joined: 14 April 2005 Location: United Kingdom Status: Offline Points: 1258 |
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Posted: 13 January 2009 at 8:07pm |
The chip you mean, is it the main ic programme chip or just the stepper motor chip. These are called darlington transistor arrays(???) Ive got a tube of them somewhere. If you send me the number on (ULN.... i think) them ill have a search.
Edited by chris_k - 13 January 2009 at 8:08pm |
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J Arthur Rank
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Joined: 06 February 2008 Location: United Kingdom Status: Offline Points: 183 |
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Posted: 13 January 2009 at 9:02pm |
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darlington chips.
For the steppers - number is ULN 2803A
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chris_k
Young Croc
Joined: 14 April 2005 Location: United Kingdom Status: Offline Points: 1258 |
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Posted: 13 January 2009 at 9:17pm |
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Before i start routing around in the workshop...
or
Edited by chris_k - 13 January 2009 at 9:18pm |
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J Arthur Rank
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Joined: 06 February 2008 Location: United Kingdom Status: Offline Points: 183 |
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Posted: 14 January 2009 at 8:31am |
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Cheers. No more flea bay for me.!
Farnell have them in stock also, and some form of stepper motors that are a little cheaper than Abstract.
But my local Maplins "dont stock fings like that, specialist stuff innit! Be cheaper to frow it away an buy dis for fifty quid innit!"
 Edited by J Arthur Rank - 14 January 2009 at 8:31am |
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chris_k
Young Croc
Joined: 14 April 2005 Location: United Kingdom Status: Offline Points: 1258 |
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Posted: 14 January 2009 at 10:27am |
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What part number you going for at Farnell for the motors?
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J Arthur Rank
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Posted: 14 January 2009 at 3:22pm |
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dazza3431
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Joined: 26 February 2009 Location: Aus Status: Offline Points: 2 |
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Posted: 26 February 2009 at 12:15am |
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Hi.
I have just purchased a stepper motor for my VR8 from Farnell that was posted on the forum.
Does anyone know the wiring from the original to the new Farnell one?
4 colours (red, orange, yellow, brown) are the same on both but old one has green & grey new one has black & white.
I have tried wiring them together & then swapping them but motor doesn't appear to do the right thing.
Can anyone help?
Darren.
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monkeypuzzle
Young Croc
Joined: 25 January 2005 Status: Offline Points: 897 |
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Posted: 02 March 2009 at 11:23pm |
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The only thing i can suggest to find whigh wire does what is to draw 2 grids like this:
1 2 3 4 1 2 3 4 where the number represents the colour of the wires. meter out on resistance the different combinations and write the value in the relevent box, do this for both and it will give you an idea as to what is what. been a long time since i've done this but draw four coils in a square with the ends joined.... acctually, Its worth doing a search for stepper motor wiring and you'll find a few useful ideas explained much better... |
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dazza3431
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Joined: 26 February 2009 Location: Aus Status: Offline Points: 2 |
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Posted: 04 March 2009 at 12:23am |
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Hi, thanks for info.
I didnt have a good working motor to compare with so after finding the 2 +12V wires I just mixed the others up until I got something good out of it.
All seems ok.
Cheers
Darren.
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J Arthur Rank wrote: