Search:

I like it. Obviously not very efficient compared to a large factory set up for this but, you're doing what you can!

I have a pair of used BK mounts. One of them fits tightly on a screw but the other one has a "wobble" when mounted on the same screw. I am assuming that the angular contact bearings in the wobbly...

I've been working on a moving gantry cnc router design for quite a while. As most projects like this go, I've made a lot of changes along the way such that the design is quite different than it...

Interesting, I was thinking about doing this last year. Never got to it.
Which epoxy did you use? I assume you greased or waxed the belt before pouring? Which belt?

Gerry that does look like it could work. But not cheap. And something tells me it's difficult to cut.
I wonder about this Flexicraft hose: ...

Sure, "Big" is relative. But I consider this to be a pretty sizable machine. https://www.youtube.com/watch?v=qPWWvUMaIEU
Is it using flexible vacuum hoses? Where would I find appropriate hoses?

I've not been able to find any photos, videos or descriptions of how the big commercial machines work in this regard. So, I'll ask... How do they pipe the vacuum hold down with a moving table?

I appreciate the warning. And it's one I've heard before. But I have to wonder if this bad luck isn't because of some other factor than them being aluminum. If they are underspecified in terms of...

Hmm. I don't see any couplings in that doc over 32mm in diameter or 39mm length. Is there another page I'm not seeing?

I'm trying to figure out who manufactured this motor coupling. It's 2" long and 2" in diameter. The bore in one end is 12mm. The other is 14mm. I can't find any beam slit couplings from any of...

Since Gerry won't be pinned down, I'm using the other posts to confirm my suspicions. :wave:

First of all, I'm trying to talk about squareness in terms of the offset between the 2 sides of the...

Thanks Ger21 and warrenB.
To follow up to Ger's comments...
Let me rephrase/clarify my questions:
A) On a $50k machine, how many thousandths of "squareness error" would you expect to see?
B)...

I recently had opportunity to work on squaring a 4'x8' table from a reputable manufacturer. It appears that the machine was never, from the manufacturer setup, very square to begin with. The owner...

Hi Gerry,

I'm curious if you ever did any measurement of this machine wrt to accuracy and repeatability. This could perhaps give some perspective on the capabilities of a wooden machine. I read...

Thanks everyone for your comments. As Gerry pointed out, no-one seems to have asked this question and since it is possible for it to be an issue, I wanted to find out if it actually was with real...

Can you explain why? I'm sorry if this seems obvious to you but I'm not sure I understand your statement.

Well, I'm not talking about throughput (or bandwidth or whatever you want to call it). A system can have high throughput but also very high latency. Think about how your machine could be getting...

I'm curious about issues with latency (delay) between different kinds of drivers used in one machine. For instance, if I use a different brand of driver on the x-axis compared to the y-axis, and...

Do you think a 32"x24" table size, used with 3/8" baltic birch and 1/8" endmills, is too small for a DIY vacuum table (lighthouse motor type of thing)?



I've worked with a 50"x100" table with...

Seeing as the smaller the area involved, the less hold down force is applied... I'm looking for opinions about where the tipping point is. If my table is x" by x", is it worth it to build a DIY...

Do you have more photos?

So, anyone know where to get these Hertz spindles these days? eBay seems to be a bust.

Thanks for the responses. Since I'm not doubting the potential capability of a Chinese spindle, I'd like to steer this back to my original line of questioning. I recognize that these spindles do...

Can you link to a European, Japanese or American manufacturer that makes a round one of 65 or 80mm diameter?

Perhaps I wouldn't need to send a Chinese one to someone to reload the bearings if I...

Ok, I'll bite. Can you point me to a reputable manufacturer of this type of spindle?

Thanks!

No replies? BTW, I'm not referring to this specific spindle in the picture but to all the Chinese round spindles of this type. I'm curious about which manufacturer originally designed this type of...

Please pardon my ignorance but are these round Chinese spindles copied from an old, well regarded manufacturer? If so, can you point me to the company?

327620

I just got some used linear bearing guides and rails and I've found that they don't run as smoothly as I expected at slow speeds. I'm finding that one block in particular wants to hang every few cm...

Hi ger,



I wondered the same thing while reading his site. At some points he comes off as a little overly alarmist which makes me wonder. But at the same time, his numbers and calculations...

Bill Pentz' website contains an awesome wealth of information but you're right, it's not a short read. And, you'll discover that he repeats himself; a lot. So you might only need to read 1/3 or 1/4...