Here is my drawing for my CNC router.
I have enjoyed reading about other people's successes and problems so I thought I'd share my experiences.
Here's my budget
XYLOTEX 3 AXIS BOARD $125
3 116 OZ-IN MOTORS $60
24V FAN $5
SHIPPING FOR ABOVE $17
BALL SCREWS AND NUTS $145
MILLING ON BALL SCREWS $105
BISHOP WISECARVER SLIDES (SCROUNGED) $0
ADDITIONAL ROLLERS $90
BALTIC BIRCH FRAME (SCROUNGED) $0
EBAY BALL BEARINGS FOR BALL SCREWS $16
EBAY 24 VOLT POWER SUPPLY (PAID TOO MUCH)$76
TURBOCNC SOFTWARE $20
EXISTING PC $0
GAS SPRING COUNTERBALANCE (SCROUNGED) $0
3 SMALL ROUTER MOTORS $225
ELECTRICAL BOX FOR XYLOTEX $25
[B]PLANNED COSTS $909
UNPLANNED COSTS SO FAR
PARALLEL CORD EXTENDER $12
REPAIR WORK TO XYLOTEX BOARD $17
FLANGES FOR BALL NUTS $64
TOTAL COSTS FAR $1002
I have several things that I want to accomplish with this machine.
1. Awhile back, I had posted an inquiry about a CNC scroll saw application. Not getting any bites, I decided that I would have to build a 2 axis machine and test out my theories myself.
That is why both the X and Y axis are stacked and move. I want to clamp a board to the moving table and process it through a scroll saw. I'll post my results once this has been tested.
2. I want to do some carving work with the router. I figured that I would need 3 bits (1/4" dia, 1/8" ball nose, and a 1/16" ball nose). I did not want to exchange bits during the program, so I came up with the idea of using 3 router heads.
These heads are spaced 7" apart and are on a common Z axis. I plan on counterbalancing the Z axis with a gas spring. My idea is that if my parts are less than 7" wide in width, I can simply move the table over under the appropriate router bit using a fixture offset.
3. The other thing I am trying to accomplish is to learn how to create carving type programs.
4. Once all these things are accomplished, I want to add a 4th axis for doing carvings in the round.
My machine capacity is 12" in X, 7" in Y (if you use all 3 heads) 21" if only one head is used. and 5" in Z.
I have almost all the parts in my shop, except that the ball screws are out for machining.
I still have to cut the wood to size. That will take me the better part of the next two weeks.
Unexpected expenses are always important to know.
1. I did not like the short parallel port cable that came with the Xylotex board, so I went to the computer store and bought a longer one.
2. I didn't follow the Xylotex instructions very well, and I think I blew up the X axis driver. I have this board in for repair.
3. The ball screw nuts that I bought through McMaster Carr came with a 15/16-16 thread for mounting. I spent most of a day trying to find a nut to fit this. I gave up and ordered a flange from Nook Industries. At $20 per axis, this was kind of irritating. You can get these from McMaster already on the nut, but they cost $30 more.
4. I bought an adjustable voltage power supply of of Ebay 0-40 volts, 5 amp. It cost me $55, plus $21 for shipping. I had this great idea that I could play with the voltages to learn how applying voltages and amps affect the drives. I should have bought a fixed output 24volt power supply for about half that cost as I am finding out that I don't really want to know all that, I want to make parts.
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