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Ahh, nice catch. The 2 holes were hand drilled after the fact as I was unsure where the threaded rod would line up once I had everything together. The missing part is just that, I'll see if I can...

Very cool! Thanks for posting the files.

I used these one:

https://buildyourcnc.com/item/bearing-v-groove-!375

Thanks Man (or Woman)! Sorry for the late reply, just remembered this notification now. I've torn down the mill as I have replaced it with my momus hybrid creation. So some of this will be off...

Mac,
As always thanks for your kind words. I figure people are out enjoying the sunshine and not huddled around the glowing screen of cnczone posting away:).

As to the question of "why the belt...

Hello All!

Its been a while and now that the weather is finally warming up I have been able to spend longer hours in the garage in more comfort. From this I have now upgraded my momus to FULL...

Beautiful build so far, I'm going to need to go back to page one and set down with a cup of coffee and read this all thru again. I am very impressed with your skill in working with both wood and...

First off many thanks for the kind words all, been working this CNC and the one at work quite hard lately and been lacking on my internet updates.

Here is a photo of the latest work to come off...

Mac,

Thanks for the kind words, but after seeing your build thread I know you are no stranger to high quality craftsmanship.

Doug thats looking great! I love the tidy electronics installation. Thats the only part about finishing I hate, build it all, then break it all back down to make it pretty. Hard to bring yourself...

This is beautiful! I'm very much looking forward to your build progression. I also admire your level of skill with sketchup! Did you hand-cut all the aluminum? I see a dog bone on some of the...

I still have yet to build an air diverting clamp for the router but I decided to run a cut today in aluminum with a little bit of cutting fluid. I found that plain old rubbing alcohol works quite...

Nice build! I admire the amount of time you must have spent with sketchup laying out all the parts!

I can vouch for one that grinding the bar stock to make v-groove rails probably isn't...

Bob,

Thanks for the compliments! Your build was quite a fun one to go thru (even in my modified fashion). I figured that I would have some loose dado's and overhangs here and there (due to the...

Many thanks Doug!

I totally understand the mine, refine, forge mentality (had me laughing)! Not sure if I can talk tho as I am just waiting for the snow to disappear so I can fire up my forge...

Once again I slightly cheated with this modification and used the large CNC at work to do my bidding. We use quite a bit of an aluminum polyethylene composite material (known as signboard, dibond,...

Without fully correcting for my slight backlash (I believe at the time of this cut it was close to 0.010...now its around 0.003"), I gave milling aluminum a shot. This particular cut was using a...

With the axis all sorted out it was time to start working on squaring everything and getting rid of backlash.

Tension along the X axis belt is an area I wish to redesign. Currently I use spacer...

Doug,
Wow thanks once again for the kind words. Photography is also another huge hobby of mine but I dont much like hauling the SLR into the garage so its just "cheap" iphone pics for this build...

Many thanks Mac,

Being as the rod is already 18 turn the amount the stepper motor would have to slip would be large before I would notice an accuracy change. Honestly the bigger worry to me is...

At this stage I had fully built the machine. I completely assembled everything, double checked that everything would work then broke everything back down for paint. Below you can see what I was...

Carrying on with the metal work...

Even with my enlarged aluminum stock and my highly modified y gantry rails I still had very very little clearance between the lower bearing bolts and the wood...

I like the level idea!

I probably had some slight height differences in the gantry tops. Initially I was concerned about it but once fully assembled I use the machine to mill its bed level and...

Going with the standard momus build I used plate aluminum ontop of the gantry walls. Unlike the standard build I did not like the idea of using lag bolts (primarily because I only had a few on hand)...

With all the layout lines marked I was able to quickly screw and glue the base torsion box together. A nail set and a copious amount of glue are good to have on hand for the next bit. I went with...

Thanks for the kind words Doug! In actuality the machine has already been built and is currently cutting...I always rush a build when I run a build log at the same time so for a change I built the...

Well after many hours of reworking and design I have successfully completed my modified Momus build!

There are many facets of this build that I would have done differently the 2nd time around but...

Nick,

Thanks! V-rail is far to expensive for me. I actually had the bearings running on 1/8" A38 hot rolled for my last machine which worked great. The very first version I built had them...

It works!

The only real way to test whether I would encounter racking or not with full bearing constraint was to build it...so I did.

Heres a quick teaser pic showing how I am having to modify...

I was actually planning on running full sets on either side. I have done this on my current machine but the span is significantly less (~10" from rail to rail) and it is driven from the center of...