I don’t normally have time to look up other equipment than the recommended.
Link to your exact steppers will help.
What is your step angle? Are your belts so tight it prevents movement? Do they work fine with no belts? When you say move 50 mm do they try and go 100? Are you using all three jumpers under you drivers? Is you power supply large enough? What size are your pulleys?
There is hundreds of questions if you didn’t buy the stuff from here.