Intro: Hobby Cnc
http://www.youtube.com/watch?v=QMCLChKNmAI First I realy thanks to instructables and Mr: Tom McWire the author of Easy to build desk top 3 axis CNC milling machine. i am wondering when i was see this instructables .I made this 3axis cnc machine and i have to share this hobby cnc by instructables how i make it . Hobby cnc easy can make very cheap ,all the material available in local market
Step 1: Controller
Here i use "PRO Tom Mc Wire "circuit to controll stepper motor .it is very cheap and easy to make. i use to make controll board common line pcb(printed circuit board),IC CD4516,CD4028, MOSFET 2N7000 ,12v 10W scooter side indicator bulb ,12v2A transformer,stepper motor (exracted from old printer) Diode 1N4007 ,zener 6V2, battery eleminator metal case ,other all components are same as circuit. solder components same as circuit , cut unwanted line (copper) from line pcb check the line using multimeter .3axis cnc machine need three controll board. I assemble circuit board seperatly for easy to test .after assemble three controll board fix inside battery eleminator case in available space see the photograph below....
Step 2: Frame
Use to make frame as PRO Tom McWire instructables "G.I pipe" for hobby cnc its enogh for stable . GI pipe size can changable which one available in the market(1/2,' or1 inch) First fix "X" rail using "U" channel screw parallel as shown below photograph.Fix stepper motor using small piece "E" channel ,Thread rod connected to steppermotor shaft use a small piece of rubber hose. 6'X6' ply wood piece for "X","Y" table, "Y" table also need two aluminium u channel for Y direction movement , for "Z" 4'X8' plywood piece screwed to frame fix U channel for up and down "Z" plate movement(fibre board)with bearing.see also Easy-to-Build-Desk-Top-3-Axis-CNC-Milling-Machine
Step 3: Software
Run controll board using kcam (trial) from kellyware.com its free and user friendly ,set table setup and port setup ,In port setup remember PIN No14 is inverted. 25pin D sub parallelport cable connect to computer only 9 pins are used in this circuit 2,3,4,5,6,7,8,9,14 . X Axis(STEP pin No2, DIR pin No.3, ENABLE pinNo.4) Y Axis step5 dir 6 en 7, Z Axis step 8 dir 9 en 14
Now hobby cnc ready for draw 6'X6' area ..Later i want to carve some design...
updated "Z" Axis see below images, use cutting board(kitchen) making clamp for rotary tool holding change stepper motor 1.8 degree 12v ,0.4A ....for smooth moving ...enjoy
Step 5: Bipolar Stepper Motor Controller Board
Hi friends...i made bipolar stepper motor controller board as circuit as mr:TOM MC WIRE.. Here is some picture..I replace 4 bulb with 12E 10W RESISTOR..