hello to all here
i have one problem with one chinese laser engraver 25watt /30x40 working area. The machine working well in generall but when i m engraving something then every 5cm about always it lose (miss) 1 step in Y - axis. The result of that is to leave one very thin unegravable line in this line of Y - axis. So if someone has any idea what is the problem for this please to writte me a suggestion

thanks
andreas