DIY Mini CNC Engraving Machine

Hello guys I have made a mini Engraving CNC machine using
28BYJ-48 Stepper motor, ardunio UNO board, GRBL CNC shield & rotary tool as spindle.
This is prototype kind of project I want to see can I make mini engraving machine without investing much, so at last I found that the machine is not as accurate as i thought it would be because of Using timing belt Both X & Y axis skip some steps other than this all is perfectly fine in next project i will use lead screw instead of timing belt

https://youtu.be/7fBV-XRt438

Arduino :- https://www.amazon.in/Easy-Electronics-Arduino-Uno-R3/dp/B01GTUE820/ref=as_li_ss_tl?ie=UTF8&qid=1518095842&sr=8-9&keywords=arduino+uno&linkCode=sl1&tag=sandeep051-21&linkId=5e8ef98ad002de23da9c05ab81578569

Stepper driver:- https://www.amazon.in/Easy-Electronics-Arduino-Uno-R3/dp/B01GTUE820/ref=as_li_ss_tl?ie=UTF8&qid=1518095842&sr=8-9&keywords=arduino+uno&linkCode=sl1&tag=sandeep051-21&linkId=5e8ef98ad002de23da9c05ab81578569

GRBL CNC Board :- http