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Dear Richard,
It is a rack and pinion on the x and acme screw on the rest of the two axis.
It is a twin head grinder with a cup and a wheel head. Very old one built by my dad about 30 years...

Dear Joe,
Unfortunately, i have no pics or cad design for you. The turret was good in operation but tricky. It was slow in indexing but clamping, rigidity and repeatability was very good. I hope you...

Dear Dylwad,

You are right. The LM guides are mounted and tested. No deflection on the axis. They are beasts and 4mm screws are just enough for the loads they are designed to handle. Mission...

Hello Folks,
I am building a surface grinder using lm guides on all axis. The Z axis has 20mm THK, Y axis has 25mm Hiwin and X axis has 15mm lm guides.
The one thing i am worried about is that the...

well,
I think the biggest problem is the certifications. If i am a good turner/machinist/fitter, but i don't have any certifications then i will not be considered by any of the big companies these...

Hello guys,

I am running a small production shop here and we need to machine about 2-9 inch long parts within +-0.001 inch (we have to grind slots as well). We have manual wheel and cup grinders...

If you have bought them from ebay, you can file a dispute.
jasminder singh

that machine seems really good for production runs also. (just look at its shiny box ways) my god! lucky you.
I would also love to see inside that 6 position turret. it seems to be an Emco type...

You didn't mention how the estop is wired? active high? active low? emulated ? which pin no etc. It is possible that a bad estop switch is being triigerred due to vibrations (if wired in active low)...

He already wrote that he got a huge piece of granite for the base. It is granite not the e/g.
(check his initial posts)

dear fish4fun,
i will be looking at the performance and stability it can deliver. At ~300$ things are never expensive as long as they are closer to the commercial cnc controls in case of stability....

no friend,
it is a parallel port BOB only. But it has opto isolators built-in it. You can save your on board port if miswired the things sometime.

regards,
jasminder singh

Dear Al,
i am planning to buy new sets because automation hardware is not very common here in india to be found in surplus stores (it is like diamond if you see it in a such a store if the drive and...

chill guys, Christmas is coming.

I was just trying to say that a 16mm pitch screws is good enough for a router where you don't need a caliper to measure having a resolution of 0.0005.
I mean it...

very nice built mactec.
Very neat and clean machine you have built. I guess you are having a big lead on your ball screws cuz they don't seem to have a 5mm lead. But that is good for routers where...

yes, i am going to use Mach. I think that rapids are a very important factor as i am going to use it for production runs. It can eat 30 seconds to 1 minute more while running a bit long cycles and i...

Hmm,
What do you think about this?
SAMSUNG 200W SERVO PACK,DRIVER MOTOR 3-AXIS CNC,ROUTER | eBay
i don't know about price range of new 200watt servo in india. Recently talked to a guy in a expo...

hello friend,
i think you better buy this kit
3 Axis Nema 23 stepper motor 425oz.in CNC Router / Mill WWW.LONGS-MOTOR.COM on eBay!
they are powerful, useful and cheap. They have built-in thermal...

hello folks,
I am building a metal mill for cutting pure steel. Weight will be around 300kg.
work area is 12x12x12.
it is having 15mm lm guides, 1 inch dia of ball screws and something to drive...

dear jerry,
congrats for such a good product. I think you should put some units of it on the ebay. I bet it is going to be a perfect replacement for stk series drivers( i think they are uni-polar)....

Hmm,
the things seems really complicated there. I think i should stick to the Mach3 and the step/dir things only. these parameters and ladders are out of my understanding. BTW do the latest...

dear friend,
i just talked to a guy from Fagor cnc controls and was surprised and glad to know that some cnc controls are available in the market that do not require any backup batteries these days....

dear Al,
i met a machine like that (same made with same control) a year before. It was saying "PC not ready" all the time. The battery was not holding enough charge when i measured with a Multimeter...

well, does it means that i need to design my cabinet like a compressor tank?
need more light on it.

jasminder singh

and where can i get them in india ( i prefer online if possible) any links my dear?
jasminder singh

hello folks,
i just realized that my stepper drivers, vfd and PSU are running at their peak temperatures and the stepper drivers trips due to thermal limit also. I touched them and they were really...

The design is very new to me and as a friend already said, it will be fun to write the g codes for it and see how it works (i bet i will create some country maps rather than some squares or...

hello friend,
I have bought some ballscrews from chai a year before and they are still in good shape. The quality was awsome when they were new.
Your post about the spindle made me worried about...

hello friend,
i just visited my friend's workshop who is having a sigma vmc with a fanuc on it. He told me that the machine was dropping the tool in the middle of the cutting operation (as you said...

dear mactec,
I a not sure about the tolerances of the bearing bores of my headstock because i got it done from the market for 20$. But they seems to be fine to me.
Now i am trying to put a ball...