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Welcome to the forum Todd!



A steel frame would work well, but I'd probably just enlarge the wood design a little. I'd increase it 2-3" in the front/rear direction, widen the gantry by 8-9",...

[QUOTE]I have no experience in working with metal. Is there anyone selling the prefabricated metal parts? I could purchase a small drill press and make a go of it, but for my first go around I would...

When I first designed the machine, the original router clamp looked almost exactly like this. The problem I quickly ran into was that I couldn't bolt the clamp to the machine, the then slide the...

Ryan,

This will absolutely find its way into the next revision of the plans. I had actually intended on putting this into the version that is out now (2.1), but I frankly forgot all about it...

Mike, thanks for contacting me about this. I just sent dxf files for the plywood to someone who contacted me through my private email. Not sure if that is the same person as Segue?

I do have dxf...

Nice job on the inaugural youtube video. I could watch that all night. Looking forward to seeing some chips flying in the next one. :)

-Bob

Probably the one thing I would do is drive the gantry from each end. The parts from the right end can be mirrored over to the left. The longer the gantry gets, any play in the right side bearings...

This is an interesting thought, and one I've had myself. However, the advantage wouldn't be so much for reducing sound transmission, but rather for structural reasons. Filling the sides and bottom...

Mike, there may be a bit of an intellectual property issue in asking for that kind of transaction. Are you looking for dxf files so that you can CNC cut the wood parts? If so, get in touch with me...

Wow! That is very good to hear. Do you know any exact specs on the type of belt that is being used? Belt material, cord material, etc.?

Mac,

I've been away from the forum for a few months (traveling and then madly trying to catch up on work) and so finally just got a chance to read through your build thread. Wow! The...

That's what I was afraid you were going to say. Sorry about that.

Uh oh. It does look like the front of the cover should be longer. The cover got raised in version 2.1, and I guess I somehow missed extending the front panel. By my 3d model, the cover is...

Here are a few images of the new bearings, and the new parts required. A plate on the bottom of the motor mounts, and a spacer block on top.

183728 183730 183732

So I've been away from the 'zone for a while, busy with a few projects. One of which is an update to the plans. I've released version 2.1, which corrected a number of small errors (all of which are...

One thing to keep in mind is that the Momus machine is belt drive, which means it can be back-driven. In other words, pull on the belts hard enough, and you can overcome the amount of holding power...

Good job! This makes for a really nice size machine.

How are the belts working at the longer length? Are you using the same XL size belt? What belt and cord materials?

Just so everyone...

Nice work! What were you using for bits? The cuts look nice and clean.

Beautiful craftsmanship, and great build log!



Yeah, the plans are dimensioned assuming an exact .750" thickness, which it obviously never is. This isn't much of a problem when cutting with a...

Trev,

As the designer of the machine, I suppose I have the longest running "stock" machine. No problems as of yet. I'm obviously a bit biased, but I thought I'd chime in with a few opinions...

Terry,

There is currently some discussion of this in the thread "Stelni's build", so check that out. It also has some nice inspirational photos.

-Bob

Yes, X/Y naming can be in either orientation. A typical Cartesian coordinate system has X left to right. However, on larger gantry machines, Y typically denotes the gantry, and X the bed, and that...

Correct that in most places the studs can be replaced with bolts & nuts. My rationale in designing it with studs was for several reasons:

1. I tend to be a little on the frugal side, and it was...

The difference in resolution when using either of those will be minimal, and both will give a resolution far, far in excess of the rigidity of your machine. The resolution is also far in excess of...

Oh no, looks to be an error in the BOM. Without pulling one out to check, I believe I used (28) 1" lags to hold the X rail plates, and then (2) 1.25" for the cable arm mounting.

So I believe...

Forgot to mention that part #13 has the same situation, by the way.

-Bob

Do you mean the location of the two 3/8" holes, which are .393" (not .303) from the edge of the part? This weird dimension came from the metric bearings. This is the theoretical center point of...

The following is quoted from the DumpsterCNC FAQ page
dumpsterCNC

What if my nuts are too tight?
Umm... ok... They shouldn't be too tight, only snug and you should be able to turn them with a...

Acme threads are also know as trapezoidal. They have a different thread profile that is designed specifically for efficiently transmitting torque loads.
Trapezoidal thread forms - Wikipedia, the...

Razz, you've got parallel threads going on here. I just responded in your other thread.
-Bob