Quote Originally Posted by Ricardoco View Post
its very odd because the measurements indicate that you have 4mm pitch screws.
The eBay listing indicates he has 4mm pitch screws and 20 turns moved it 80mm, which also indicates 4mm pitch screws as 80/20=4mm. So nothing to worry about.

The voltage readings are strange - should have got 5V or 0V, but nevermind as we now know they're set to 1/4 microstepping.