Hi, I'd like to share a pettent for vinyl cutting. You have to buy the eleksmaker draw module https://www.banggood.com/EleksMaker-Draw-Module-XY-Plotter-EleksDraw-Replacement-Ink-Pen-Holder-A3-A5-Engraver-Upgrade-to-Drawing-Machine-DIY-Kit-p-1435710.html?rmmds=search&cur_warehouse=CN
and a vinyl cutter
Then you have to make 6mm thread inside the vinyl cutter and use a 6mm bolt as a pen. Because it was rather thin i used a piece of plastic around the bolt or you can use a longer tightening the pen screw.
Then load the eleksmana firmware and use the setting eleksdraw. Try if the the axis move the right way and maybe if not use the setting ''reset Grbl Parameters'' from Machine menu.
Put your workspace under the cutter(I use cutting mat) and adjust the movement of the cutter by pressing ''laser on''. The tip of the cutter must be so small as your vinyl is.(we want to cut the vinyl and NOT the paper behind it). So firstly adjust the tip of the cutter by turning the cutter and then adjust the whole mechanism so when laser is on the cutter plastic tip of the cutter just touches the vinyl and the drag knife is pouched in the vinyl and cuts it.
After that go back to the first page of adjusting the laser parameters(as speed, loser power etc) and put at laser max laser power the number we found previously. Mine was 32.
The only problem is that the servo isn't as accurate as a z axis but it does the job. I even cut with 2500 speed!!!
P.S Be careful firstly upload the new firmware and then plug the servo!!!