I had also email you about month and a half ago about new small machine 12 wide for pool cues,Never got reply back also
Can that be requested with more Z clearance, George?
Thanks.
General thoughts on this CNC?
- Thread starter TomHay
- Start date
Can that be requested with more Z clearance, George?
Thanks.
RBC
Deceased
Just some more fun stuff!
At one time I wanted to use linear motors for a CNC inlay machine. I actually have a couple of pick and place machines with some linear motor slides on them, but I've not ventured into tackling all the control and feedback scenarios. They use a linear encoder that's basically a magnetic strip and a reader head. The encoders used are usually either 5 micron or 1 micron resolution. The motors are really quick and extremely accurate. They don't use screws or belts at all. It's all magnetics.
Here's a cool video of one in action. It's a demo machine for this particular company that they take to trade shows. It's really cool!
https://www.youtube.com/watch?v=mmymrJcPxdE
Royce
At one time I wanted to use linear motors for a CNC inlay machine. I actually have a couple of pick and place machines with some linear motor slides on them, but I've not ventured into tackling all the control and feedback scenarios. They use a linear encoder that's basically a magnetic strip and a reader head. The encoders used are usually either 5 micron or 1 micron resolution. The motors are really quick and extremely accurate. They don't use screws or belts at all. It's all magnetics.
Here's a cool video of one in action. It's a demo machine for this particular company that they take to trade shows. It's really cool!
https://www.youtube.com/watch?v=mmymrJcPxdE
Royce
quite, holly cow. pretty sweet right there.
steve
steve
Sorry wasn't really paying attention when i replied.
i was thinking stalling
On steppers, there is a big difference in torque from brand name motors to ebay motors.
To compensate for resolution on fast ballscrew, you use higher driver stepping, 1/32 or 1/64 step.
Low quality controller will not keep up on 1/32 or 1/64 step at fast speed and stall and miss steps.
Never had problem with low torque even at 1200ipm, .
This vid is running at 1/32 step, if 1/16th step it would be alot faster . it is also a big machine with heavy gantry,
https://www.youtube.com/watch?v=t0V_10TdGrk
MalibuMike
Banned
I don't get the whole CNC thing...
I know Shane aims that way, but I have better luck with the old Ghost ball aiming method, I get confussed with CNC aiming when I shot to the right I line up the edge of the Object ball to the left side of my shaft, I come no where near the pocket! I must be dooing something wrong! Please help!
I know Shane aims that way, but I have better luck with the old Ghost ball aiming method, I get confussed with CNC aiming when I shot to the right I line up the edge of the Object ball to the left side of my shaft, I come no where near the pocket! I must be dooing something wrong! Please help!
harris cue comp
Banned
cnc
I was one of the first cuemakers to use one of georges machines quite a few years ago. the first one I set was a point cutting machine. I have cut well over 600 forearms with it with exacting results.
the last machine was a 30 x 48 and it has 5 different stations. I pocket with a .0313 bit at 32 imp. I also use .01 bits that I run at 12 ipm and the results very good.
as Royce said George can be trying at times, but the machines are top notch.
thanks
Robert Harris
I was one of the first cuemakers to use one of georges machines quite a few years ago. the first one I set was a point cutting machine. I have cut well over 600 forearms with it with exacting results.
the last machine was a 30 x 48 and it has 5 different stations. I pocket with a .0313 bit at 32 imp. I also use .01 bits that I run at 12 ipm and the results very good.
as Royce said George can be trying at times, but the machines are top notch.
thanks
Robert Harris
What happened to the rest of the pages?
The Good Ol' Boy network absorbed them.
TW
more questions
George, this may seem harsh but its real. Theres ALOT of things that I feel you have done very well with the machine design compared to your competitors such as large plate, minimal extrusion, oversized rails and ballscrews and anodizing.....however there is one thing that really baffles me.
I've had a few people ask me what I thought of the Xzero machines and my response has been the same.
I love the machine, the guy has done alot of things right but theres one thing that totally turns me off. This guy goes to the trouble to source TBI "or similar quality" screws, angular contact bearings and then secures the screw with a motor coupling? Huh? Really? A guy who designs and executes a machine in which competes with guys at 3x the price range and he secures the screw with a motor coupling? Why not spend the extra couple of bucks to have the screw supplier thread the ends and provide the nut like the rest of the world? I mean, even if you increase the cost of the machine $300 to make it bullet proof then your still way lower than the competion.
George...your market position with these machines only stands to get stronger.....don't let some small but vital detail ruin that.
George, this may seem harsh but its real. Theres ALOT of things that I feel you have done very well with the machine design compared to your competitors such as large plate, minimal extrusion, oversized rails and ballscrews and anodizing.....however there is one thing that really baffles me.
I've had a few people ask me what I thought of the Xzero machines and my response has been the same.
I love the machine, the guy has done alot of things right but theres one thing that totally turns me off. This guy goes to the trouble to source TBI "or similar quality" screws, angular contact bearings and then secures the screw with a motor coupling? Huh? Really? A guy who designs and executes a machine in which competes with guys at 3x the price range and he secures the screw with a motor coupling? Why not spend the extra couple of bucks to have the screw supplier thread the ends and provide the nut like the rest of the world? I mean, even if you increase the cost of the machine $300 to make it bullet proof then your still way lower than the competion.
George...your market position with these machines only stands to get stronger.....don't let some small but vital detail ruin that.
You are correct about the quality of some places to make rolled ball screws. The latest I have seen on rolled screws from Germany, are as accurate as ground ones.
The video is nice, but preloaded backlash free ballscrews are not that free moving.
Neil
I can't speak for George, but on the set up I am buying, I helped in it's initial design and manufacturing. On the ball screws, there is only a thrust retention on 1 end of the ball screw. Thrust and secured from 1 end only, the other end is supported but can float in the axial moment. This was intentional on our soon to be My machine. The reason was the screw is steel, the frame is Aluminum. They expand at different rates, so allowed for the difference in lengths to take place in the end shaft support. This is done on all the axis screws. The total movement between a hot day and a cool night is not really huge, but it is still there.
The motor to the shaft is coupled through one of those special flexi couplings just like what Hardinge use on their super precision lathes, but only smaller ones. The other option was to use wavey spring packs on the end of the leadscrews to keep tension on the screw the whole time. But there has not been any problem with what we have made so far. The only upgrade is going to be more powerful stepper on the 3 axis to handle the ruffing out of steel parts.
Neil
Neil,
We want pics when your are set up and running.
Good luck with the new set up.:thumbup:
Rick
My frame and whatnots arrived. Ballscrews are leaving Hong Kong.
I ran out of money for the rest... :-( need motors BOB, VFD, and spindle.....
I'll document everything in detail like I did the DRO.
That's when I find a place to put this thing.....
Neil, your method of retention is sound as well as typical of good machine design. It is exactly what I'm questioning on the zero machine
Great! Now I am really torn! I have been debating on taking George up on the sale he has on the mini. Thinking of using it for an inlay machine and then getting a Raptor or just getting a Raptor and doing it all on one machine. Now I don't know if I should just pass all together
Randy,
I find that odd as well. Is it common for ballscrews that are sourced from Taiwan or Japan to be routed through Hong Kong?
Don't get me wrong, I don't want to be that guy who only tries to blow holes in his scenario, but I am that guy who believes that if it seems to good to be true then it usually is.
With all that being said, if George would consider threading the ballscrews and confirm the origin of ballscrews to be a quality source, I'll buy a frame
I have used coupling to hold bearing in spot for 7 years and over 1000 machines not and not one has caused a problem .Coupling is just like a collar clamp. Once a coupling is tighten , you can try and pull it off with tractor and it will not budge . Machining cost same with threads and without. Coupling is maybe 10 times stronger than threads .
I did when i first stated have have threaded ballscrew end . People strip threads on ballscrew and costed me lots of money, Coupling puts perfect load on bearing.
As for the machine, i give people what they pay for, Machine itself for the price, you will only find a round rail machine from other places and china. Most important part is rails on a machine.
Ok , when you import $20.000 a month in rails and ballscrews, let me know how you ship them, Shipping from Taiwan itself cost 5 times the price if not more. My stuff don't come by sea. Also not mentioned ,all parts are shipped air express
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