Fear
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Registered: 20th Nov 02
Location: Down off the hill
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right what i wanna do is this:
I want to make something to go from flat through 90 degress to up right!
I went into maplins today and the guy suggested a servo as is a very slow moving motor but the control box was like £80
So i need a 12v motor of some sort that moves very slowly through a minimum of 90 degrees and that can also go in reverse to put it back down!
Ive looked at actuators and motors on the net but its all abit confussing!
So i just wonderd if anyone knew of anything suitable
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CorsaJunkie
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Registered: 2nd Feb 03
Location: Athens
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made a quick scetch, hope it helps
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Ian
Site Administrator
Registered: 28th Aug 99
Location: Liverpool
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If you want it slow, use a worm gear.
Depending on the size of the thing you're moving, an old VCR will probably have right right parts in.
If its any bigger you may need to investigate pneumatics.
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Fear
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Registered: 20th Nov 02
Location: Down off the hill
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quote:
Originally posted by CorsaJunkie
made a quick scetch, hope it helps
Thats how easy i thought it was gonna be!
But its finding a small enough motor that goes slow enough!
Its gonna be to move a 6.5 inch screen from flat to 90 degrees!
Ian thought of that but would need to be 12v!
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Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
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Most of the internals of a VCR should be stepped down 12v stuff. You could even go to an old bus/coach firm to see if they have any old 12v tape players if thats not the case.
Or look at this webpage http://www.robotsystems.co.uk/Product/Plinmot.html and phone the guys on there for some advice!
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CorsaJunkie
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Registered: 2nd Feb 03
Location: Athens
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I dont think you can find a motor that goes very slow.
You can find an ordinary motor and fit gears to it so that you decrease the rpm and increase its torque. That will be very difficult to achieve.
You can try shops with electronics, lots of motors and gears there
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Fear
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Registered: 20th Nov 02
Location: Down off the hill
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my best bet at the mo is a servo, looked at one on maplins site!
Its just gonna be operating it that gonna be the problem, have e-mailed them so hopefully get an answer soon enough!
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Dom
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Registered: 13th Sep 03
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you got part number for the maplin servo mate? 
tbh, it depends what servo you are looking at, as i im sure you could bodge something to control it for a LOT less than 80 quid 
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Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
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im sure this is something claire richardson looked into not long ago, could try asking her?
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Fear
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Registered: 20th Nov 02
Location: Down off the hill
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The servo is the ball race one on this page:
http://www.maplin.co.uk/Search.aspx?doy=31m1&source=15&criteria=servo
I was looking at the servo check thingy that controls it aswell and also the keypad controller, but dont know how the tings work!
They are alot cheaper on there aswell!
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John
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Registered: 30th Jun 03
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http://www.maplin.co.uk/Module.aspx?ModuleNo=20531&TabID=1&source=15&WorldID=&doy=31m1
That says it does a slow sweep through 90 degrees? Can you not just wire that to a switch?
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Fear
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Registered: 20th Nov 02
Location: Down off the hill
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thats what i thought but im not sure if you need a controller for that to work or what kinda power supply it needs!
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Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
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You wouldnt need a controller for that, its on board.
It would need a 4.8v supply though
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Fear
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Registered: 20th Nov 02
Location: Down off the hill
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You can get a voltage selector though cant you would that work
How do i control it though, does it have a switch or something else
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Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
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That is the controller itself. You connect a servo to it. You would have to buy it then fool around with it i think
http://www.milinst.com/animatronics/animatronics.htm#check
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John
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Registered: 30th Jun 03
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From that link richie posted that looks like it could be exactly what you want. Can adjust the speed and everything.
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Fear
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Registered: 20th Nov 02
Location: Down off the hill
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yeh that does look like what im after 
Cheers richie you are a leg end
What servo would run off that, ould i get the one from maplins and use the servo-check they have on there aswell
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Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
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http://www.milinst.com/animatronics/animatronics.htm#servo
Shows you the different servos they do, dont know if maplin have em tho
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