CNC 3018 upgrade with BLDC motor spindle with ER8 spring collet chuck

thingiverse

I upgraded my cheap Chinese CNC with end switches following this design: https://www.thingiverse.com/thing:2796202. However, standard brush motor produces too much noise, triggering input of GRBL controller board immediately when motor started, making upgrade with end switches unusable. Based on ANT PCB mill machine, I designed a BLDC motor powered spindle that is a fully compatible substitution for the original 43 mm motor delivered in CNC 3018 assembly. For assembly, you will need: 1x BLDC motor (I used RAY brand) C3536-1250 1x ESC controller 40A with BEC (also I use RAY brand) 1x ER8 60L Collet Chuck Holder extension rod/bar Straight Shank for CNC Milling 1x ER8 1/8" 3.175mm Spring Collet For CNC Engraving Machine & Milling Lathe Tool 2x 626 ball bearing 1x Multi Servo Tester 3CH ECS Consistency Speed Controler Power Channel CCPM meter Master Checker RC Dron Helicopter Parts RC Hobby 3x M3x40 mm DIN 912 2x M3x30 mm DIN 912 4x M3x10 mm DIN 912 2x 2,2x6,5 mm DIN 7981C (for servotester PCB) 2x O ring rubber 45 mm 1x 4 mm COLLET PROP ADAPTERS MPjet 4703 1x 6 mm COLLET PROP ADAPTERS MPjet 4706 This upgrade requires a 12VDC power supply, not 24VDC. The assembly fits perfectly into the original Z axis holder, so no additional adjustments are needed.