New Machine Build- Second build (this one is for dad)

[rlwoodjr]

I have been working on this for a while...getting closer.

27" in the X
18" for the Y
7" for the Z
50 IPM top speed with 180 once in steppers
HobbyCNC 4 axis controller
Modified TurboCNC

[rlwoodjr]

I have modified turbocnc to:
jog with dual X axis using Left/Right keys.
use the * key for fast jog so I can use the numeric pad for jogging


Also, my HobbyCNC board has a power reduction feature modification (see link)

Current Reduction, HobbyCNC - Mach3

What I am going to try to modify turbocnc to reduce power when motors are not active for a set period of time.

[Arquibaldo]

Dear rlwoodjr:

Beautiful machine - very elegant design and proportions - great craftsmanship
- Congratulations!

Would love to see more details: type and size of rods and bushings, screws and
nuts; is it all aluminum?

Nelson

[rlwoodjr]

Originally Posted by Arquibaldo Dear rlwoodjr: Beautiful machine - very elegant design and proportions - great craftsmanship - Congratulations! Would love to see more details: type and size of rods and bushings, screws and nuts; is it all aluminum? Nelson

Thanks.....
All the linear rails are 3/4", the X has an extra middle support. Bearings are Thomson.

The screw drives are 5/8" ACME and 8 threads per inch. The nuts are UHMWPE (Polyethylene, Ultra High Molecular Weight) plastic material. Cut with a tap made from the threaded ACME rod.

Frame is all aluminum on an MDF frame.

I still need to add the YZ cable track and the home and limit switches. I also have a 4th axis (rotary) that I am going to add. So I still have lots to do..

[rlwoodjr]

I made an adapter plate so I could attach the stepper to the harmonic drive.

Harmonic drive is 50:1

The metal behind the chuck is a bearing...need to make a mount for it.

[rlwoodjr]

Added the channels for holding down the work. Put it on a stand....

[rlwoodjr]

I actually got to use the machine to make something

[rlwoodjr]

Moving along....

[CarveOne]

That's really looking good! Excellent job and a nice design. Gotta have one of those one day.

CarveOne

[rlwoodjr]

Got the limit/home switches installed. Sure is nice not stalling the stepper motors when you go too far....

[MadeInTheShed]

Originally Posted by rlwoodjr Moving along....

Is that a reduction drive on your 4th axis motor? I am running thru ideas on how to make one of these, and that looks like a very simple method.
Where did you find that one?

Jon

[rlwoodjr]

Originally Posted by MadeInTheShed Is that a reduction drive on your 4th axis motor? I am running thru ideas on how to make one of these, and that looks like a very simple method. Where did you find that one? Jon

It is a 50:1 harmonic drive. I bought a couple of these on Ebay. They do not have any backlash so it seems like a good idea.

I have not made anything yet, but its my next project. I am using GMAX and the CNCtool kit so I have a learning curve.

I had to make an adapter plate...pretty easy when you have a cnc mill.