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Forum looks dead, but I'll try anyway.

Anyone have a bulletproof Mach 4 Hobby profile for a Saturn 2, AvidCNC Plug and Play, Nema 34 motors?

Thanks in advance.

Mick

Mactec54, I'm pretty much on the same page as Gary in terms of size and interests. Our Saturn2 4 x 4 equipped with AvidCNC controller, NEMA 34 motors, 3Hp spindle and Mach3 was right around $7500. I...

Thanks for clarifying, mactec54. Again, I'm looking forward to seeing what you come up with.

Could be that that's the case, but from one of his previous posts, "I may be building some new smaller machines in the USA starting in the new Year, these will most likely only be proto types and...

No, you misread my post. The cost to do the stress relieving and the machining of the datums was $500 24 years ago. And that was to a subcontractor who was making a profit on it. Had we possessed the...

It sounds to me like he's already doing it on the existing models being produced, so he is already set up for it. The cost of machining it properly vs not is not as straightforward as looking only at...

I'm looking forward to seeing what you come up with in a smaller format machine!

Thanks for your post, Mactec54. I'm familiar with NewCNC having seen them at IWF, et al for years. Nice looking equipment!

Nice, David! I've found that on our S2 44 the limiting factors for feedrate are mainly the 3hp spindle and holding the material securely. We have NEMA 34 motors and they could easily push it much...

Whiteside, Amana, Osrud Cutter and others also make "mortise" compression bits. These have a shorter upcut depth than regular compression cutters so you don't have to cut full depth, just past the...

We had issues with Nate's drives from the start on our Saturn II. We returned them for credit and swapped them for Avid's. Not compatibility issues at all and no drive problems since.

Thanks for the detail, Peter. I guess I'm never too old to learn!

Peter, I guess my assumption was based on stress relieving as they used to do with cast iron by putting it out in the "bone yard". I didn't know that steel did not behave in the same manner.

So...

On the upside, if my earlier assumption is correct - lack of stress relieving of the frame - over time the stresses will equalize and the frame should be stable. Once that occurs, shimming and...

CNCRP

Ours are from CNCRP. They have both keyways and set screw.

$16.25 each from CNCRP for NEMA 34 pulleys. I agree, FLA should honor their commitments, but we decided to order the missing parts from CNCRP and Nate did come through with the refund. Not worth the...

Nate is notoriously slow to respond. After we had been told that our machine had shipped I realized that he had, in fact simply created a shipping number and used our machine to film a video for this...

The amount of rail adjustment is limited to the difference in the rail bolt hole diameter and the bolt diameter without redrilling and tapping the bolt holes. We never put an indicator to it. We...

100% in agreement. I worked at the manufacturing facility for several years when I was with MultiCam. Early on they subcontracted to a local place to have their frames and gantries stress received...

I'm not sure what difference, if any, it makes whether the rail is top or side mounted. Both work fine if the tube (datum) is straight.

If I bought a CAMaster and it was out of quoted tolerances...

Bill, you must have linked to a different video. The one posted is a guy sitting on his router table talking about how much he likes his router for 10 minutes.

The problems with our machine were...

Yes, I get it. I'm not trying to argue with you, Bill. The point I was trying to make was that Nate should build his machines to the tolerances he claims. He doesn't.
Before we bought this machine...

Camaster and MultiCam machines are not the same. MultiCam steel frame machines (as well as SCMI, KOMO, Anderson, Biesse, Morbidelli, CMS, Shoda, etc., etc.) are all welded, stress relieved and...

I would suggest what I suggested in the very first post of this thread and multiple times since. Nate needs to stress relieve and machine these frames.

I'm not suggesting that the FLA is not a...

David, stress relieving is not the same as hardening. It simply equalizes the internal stresses (hard & soft spots) caused by cutting, welding, etc. thereby minimizing subsequent distortion. Think of...

It would be nice if it were that easy. Not quite. Needs to be held between 1100 degrees and 1350 F for thermal stress relieving. Most mfrs use vibratory stress relief for that reason.

Yes, it's climate controlled. Machine is level. We set it up over a year ago and this is the first time we've had these issues. Stress relieving (or more precisely, failure to stress relieve) could...

It's a combination of errors, IMO. I believe the errors in the rack and rail mount alignment are due to the lack of a machined datum in the steel frame. As I said before, that practice is an industry...

We haven't finished, yet, but here's what we've done so far:

1. We started by dropping the motors on the Y axis, then fixed a Starrett straightedge to the outside face of the rack using 1" x 2"...