Hi everyone, sorry for my english.

I use DM860A bought on ebay from longs motor, after a while, the step motors started to miss steps and one drive stopped working at normal temperature. I had to heat it up with an hairdryer to make it work. Last week I got another kit, replaced parts one after the other and discovered that the break out board and the 3 drives caused step missing, so I replaced all of them and it was working good. I thought the low temperature and the humidity was the problem so I kept the electronic at about 10-16 celcius. Today, the second kit made the same thing. I missed steps on Y axis then on all axis. Now I have 6 broken drives and at least 1 break out board broken. Somebody had the same problem ? What should I check? Any advise would be appreciated.

Here is the kit :
3AXIS Nema 34 Stepper Motor Dual SHAFT1600OZ CNC KIT OR MILL Free Shipping USA | eBay

Thank you for your help

:drowning: