I have another friend named Ernie Guttierrez who has been an innovator in the cue building art for years. Almost everyone has learned a thing or two from him, and he doesn't hold it against them. In fact, he is always ready to help out another cue maker. Just ask your friends Rick and Jerry about that. There is a lesson here and it's not about cue building.
In short, Mike's a REALLY smart guy. If he says, "XYZ is 4-axis inlays" --- I default to believing the guy. That way, if I lose a bet -- I'm losing a bet on the side of a legit genius. That's how I see it.
Believe me, I totally understand.
We aren't talking about some cabinet maker turned cueman, we aren't talking about some musical instrument maker turned cueman, and we aren't talking about generalized machinist turned cueman or an enthusiast/hobbyist turned cueman and refining and honing their craft as they go.
And that is not to say that anyone of them can't make a great cue, but when it comes down to whos got the smarts...
How many other cuemakers have contributed to deep space probes that might be searching the heavens, make contact with alien lifeforms if they exist, and will probably be floating through space for who knows how many years to come.
HAHA
I made that point on Cuezilla. Many don't know that about Mike. For those of us in a high-tech field, we know the elite of the elite of the elite work at either JPL or Los Alamos National Laboratory. He worked on microwave communications from deep space probes (or something like that - he told me but I had a hard time following).
In short, Mike's a REALLY smart guy. If he says, "XYZ is 4-axis inlays" --- I default to believing the guy. That way, if I lose a bet -- I'm losing a bet on the side of a legit genius. That's how I see it.
No axis substitution.Is it 4-axis work. NO.
Rotary machining is generally axis substitution. Usually the Y-axis is replaced by the A or W-axis and is changed to rotary motion in degrees.
Like GibbsCAM? Cuezilla.com states that's what Lambros uses.True 4-axis machining involves no substitution and all 4 axis are moving at the same time. I have the software to do this and use it a lot. I am not sure who else has it.
I have to respectfully disagree with you Bill. I'm a career-long automation and controls engineer working side by side with the highest technology machinists in the world in the injection molding field. What you wrote as "true 4-axis machining" and "moving at the same time" is not in any machinists' or automation definition.
I believe this is simply a case of a cuemaker term that isn't a norm used in the machining world. You and Thomas are pioneers using interpolated multi-axis control in milling cues, but I have to disagree to the use of your terminology. I'm not going to say it's a semantic issue either. I'm not allowed to redefine someone else's terminology. 4th axis machining was a term understood in machining long before NC was put to cues.
Does this agreement also include the way he presented his argument?
Respectfully,
Fred Agnir
No axis substitution.
Like GibbsCAM? Cuezilla.com states that's what Lambros uses.
Fred
Bill:
For my own education - if an inlay wraps around a cue and the depth to the bottom of the pocket is identical throughout--- and the inlay fits perfectly into the pocket - isn't that 4 axis work? Based on what you're saying, can one tell the difference between the final output of the two? If so, how? I heard people used to do 4 axis work by hand over a hundred years ago. Therefore, does it matter if a machine's axes all move concurrently when true 4 axis work was done manually forever ago? I'm just asking because I don't make cues and I'd like to know.
I think this is a terminology issue more than a cue issue. TW's ORIGINAL gripe was that the inlays were flat and called Lambros a fraud. That should be the primary discussion, imo.
Thanks for the insight-
Dave
Dave,
The work you are describing can be done with 3-axis machining. One axis is simply the rotary. This will result in a pocket of uniform depth in a cylinder. Some (but not all) of the sides of the pocket will have tapered walls pointing at the center line of the cylinder.
This is not true 4-axis machining. It is axis substitution. Rotary motion is simply substituted for one of the linear axis. That's where the name comes from.
Bill Stroud
To clarify Bill, I am not a cuemaker nor do I pretend to be. I'm an automation engineering manager and a former motions controls engineer.Fred,l
I have only been doing 4-axis cue work for 30 years and perhaps you have been around cuemaking longer than my 44 years but I think you are missing the real point here.
For someone to claim they are doing 4-axis cuemaking and not actually doing so is a major insult to the few cuemakers that really understand what 4-axis machining is as it applies to cuemaking.
Bill,
I'm not a machinist, just interested...can you help me understand?
I get that 2 axes create a box lets say. The 3rd axis is rotary. What I don't get is how you would get a uniform depth in the pocket without either raising and lowering the work (which seems like it would be another axis) or else raising or lowering the cutting tool. Oh wait...its becoming clear...you're saying that the rotary axis is replacing one of the XY axes to make the shape. So you are saying that you could have X, Rotary, and depth be the 3 axes involved? If so, I think I am understanding you.
Is this right?
KMRUNOUT
Edit: also, could you give an example of what the 4 axes would be in "true" 4 axis work? I'm having trouble visualizing...
Hmmmm.
The proverbial "Bigger Better Best" contest has started.
.
to much chit chat.post some code so that it can be judged.get it over with.
bill
Hopefully Bill will answer you but here is how it works on the laser we own.
Normally the laser head travels on the x/y axis which is left-right and back-front. The head sits at a fixed height from the work and so the depth is consistent. The work is fixed in place and the laser head moves.
When the rotary is installed then the rotary replaces the y-axis.
Now the laser head moves left-right but NOT back-front. Instead the WORK now moves back-front while the laser head travels left-right. Thus it is possible to make in this manner pockets which wrap around the cue in an unbroken line. Picture a candy cane - this is possible to make in a cue using the laser where the rotary attachment replaces the y-axis. You can laser 360 degrees around the cue. Actually you can laser more than that to infinite rotations.
As Bill said though the issue is the tapered walls.
As a challenge to myself I have duplicated Thomas Wayne's wrap which he did on the snake skeleton cue. I have made a template which allows me to laser engrave around a cue.
That's for making pockets. Making the inlays to fit a curved space is the problem.
Think about it - with regular inlays you are essentially putting a block into a hole and cutting off the excess at the top. If you take the cut inlay back out you end up with a piece that's flat on the bottom and curved on top. This is the reason that inlays can only go so far before they weaken the cue - i.e. you have to cut out too much of the base in order to have wider inlays that traverse the more of the circumference.
So the answer to making inlays that go around the cue is to cut pockets by moving the cue while the end mill is cutting. But then you get pockets which have curved bottoms. How do you now get inlay pieces to have curved bottoms to match your pockets?
I won't tell you that just yet.Just will tell you that it's possible to do it on a laser engraver/cutter when you have a rotary attachment that replaces the y-axis. So you can see that one does not need a 4-axis machine to do inlays that wrap around the cue.
Also I should mention that some machines have a z-axis which is the vertical movement, either the work moves up and down or the milling tool moves up and down. With a Z-axis the depth can be varied and essentially the machine can sculpt by either cutting away material or cutting out material. In other words leave an egg where a block was or make a hole that an egg fits into.
And that's about all I know. My very limited knowledge stems from using the laser to decorate cues and compared to Bill and Thomas' it's the equivalent of comparing a guy who goes on the slip and slide once a summer to Olympic divers.