My first build log of my belt drive DIY CNC Machine - PICs

[studysession]

I know it looks like poop. It does work and it is pretty accurate. I also still have a lot to finish on this thing. It has a cutting area of 6 ft by 4 ft. The structure is 10 series 8020 aluminum.

Will have a rotary as a forth axis. Using Mach3 as control software. I still have a long way to go. I have a lot to still learn.

In the beginning I wil start with wood so ordered this chuck here for my rotary:
http://www.pennstateind.com/store/csc2000c.html
Faceplate that chuck will screw to and then attach to rotary:
http://www.pennstateind.com/store/cf6.html
Will make an adaptor for my rotary to the faceplate and use it.



http://www.cnczone.com/forums/attach...8&d=1183209742

[studysession]

More pics - remember I am not finished. This is a work in progress.

I want to fully enclose everything behind plexiglass when it is finished.
.

[harryn]

Hi - looks pretty good. Are those drawer or skate bearings ?

[studysession]

Originally Posted by harryn Hi - looks pretty good. Are those drawer or skate bearings ?

They working pretty well. Right now my main consern is the gantry. Trying to see what will give me the most support. Today will do some engraving on 1/4" thick MDF for practice.

[rlrhett]

Studysession,

I see that you have fixed motors, so I assume that the gantry is attached to the timing belt itself at a fixed point. Can you show how you made that attachment?

Thanks,

[studysession]

Originally Posted by rlrhett Studysession, I see that you have fixed motors, so I assume that the gantry is attached to the timing belt itself at a fixed point. Can you show how you made that attachment? Thanks,

Sure - over the last three days I re-did most everything. When I find the cable for my camera, I will upload pictures. It is much more sturdy and not just down on the floor anymore. Also a bit smaller. Has a cutting area a bit more than 4 ft by 3 ft now.

[studysession]

Here are the pics. I built a wooden base for it all to sit on. As you can see there really isn't much to it.

The picture showing the mounted z-axis from behind looks a bit tilted, it was the camera not the z-axis. I did not hold the camera straight.

[studysession]

One more thing -
I did not make the bearings myself even though I could have. Not a big deal but purchased them from here:
http://stores.ebay.com/HUBBARD-CNC-INC

I also purchased my stepper motors from him as well.

Motor Specifications:
NEMA 23 282 oz-in stepper motor
200 steps per revolution
1.8 degrees per step
Bipolar series Volts=3.864, Amps=2.1, Ohms=1.84, Holding torque=2.0 Nm.
Bipolar parallel Volts=1.93, Amps=4.2, Ohms=.42, Holding torque= 2.0 Nm.
Unipolar Volts=2.76, Amps=3.0, Ohms=0.92, Holding torque= 1.4 Nm
Dual shafts, Main = 1/4" x 20 mm, Back shaft= 1/4" x 15 mm

http://cgi.ebay.com/Stepper-motor-28...QQcmdZViewItem

[studysession]

Finally have amy issues worked out. The cutting is so much smoother now. Attached is a pic of the sign I am cutting out onto balsa wood. It will be small 6 in by 12 in. Good to put on my friends desk at his place of business.

The software used for rendering is VCarve Pro 4.6

[gascarracer]

Hi,

How are the belt Drives working?

Ernie

[studysession]

Originally Posted by gascarracer Hi, How are the belt Drives working? Ernie

I am happy with them.

[daburdge]

Realy nice machine! Im just starting mine and want to use belts and pulleys too. Any ideas on where to get the belts and pulleys? And what kind?