Re: [APML] Stepper motor speed controller?

[Chris Rowland <chris.rowland@dsl.pipex.com>]

steve banbury wrote:
> Hi Brian ---a replacement potentiometer (also called a variable 
> resistor) can be purchased from
> Radio Shack or various on line electronics stores for a couple bucks.  
> If you can find someone in
> your area with a multimeter, you can measure the resistance value of 
> your 'pot", and order another.
> Hopefully you can also find someone with a soldering iron.  Replacing 
> the part should not be a big
> deal.

It's likely that the guy with the multimeter also has a soldering iron. 
  If you're in the UK I could help.

Chris

>>> Hi Brian
>>>
>>> You may be able to just replace the potentiometer in
>>> the drive
>>> controller if it is just the shaft that was snapped
>>> off.
>>>   
>>
>>
>> Well originally it was just the shaft that just broke
>> off.. I tried supergluing a piece of allen wrench in there,
>> but then it froze the insides of the dial by the
>> excess glue.
>> What a bonehead move!
>> A few choice words did not fix it.
>> Im currently looking up what a potentiometer is.
>> So far it looks like the dial that im referring to.
>> In fact it looks like this:
>>
>> http://images.google.com/imgres?imgurl=http://www.technolab.org/Bilder/pic-hako/Hako441a.JPG&imgrefurl=http://www.technolab.org/Hako/Katalog-e/Section6.htm&h=226&w=226&sz=13&tbnid=6PpSubPyyDcJ:&tbnh=103&tbnw=103&hl=en&start=18&prev=/images%3Fq%3Dpotentiometer%26svnum%3D10%26hl%3Den%26lr%3D%26sa%3DN 
>>
>>
>> 2nd row of pictures from the bottom.
>> Sorry for the long url.
>>
>>> Open the box
>>> and see what numbers are written on the pot. You
>>> might be able to bodge
>>> in an off the shelf pot to replace the broken one.
>>> It would be a lot
>>> easier than trying to figure out the number of steps
>>> for the stepping
>>> motor and the gear reduction to the output.
>>> Are you guiding in only one axis?
>>>   
>>
>>
>> Yes, only one axis and I manually correct the other.
>>
>> Brian
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