Quote Originally Posted by irving2008 View Post
Do you have a datasheet for those motors? The 112 designation seems to be a special, it's not in the catalogue. They are 200 steps/rev. Low torque motors by cnc standards. You got these off fleabay @ £6.50 each?

What L298 driver boards are they? Most of the shield ones have uselessly small heatsinks.
Hi Irving..

The Stepper Motors are : E-Bay item 271431291269, no datasheets that I could find, searching the links the seller put with them, as with you no 112, or for that matter the ending W which supposedlt designates Unipolar or Bi-Polar is not listed

And L298 Driver boards : E-Bay Item 301045130656

I did have a breakthrough last night and got the steppers moving using a 5v source, and the heatsink did get a "tad" warm ! So will look at upgrading it and maybe a small fan off an old graphics card put to use.