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Perhaps Roton made some changes. I had purchased a Roton BallScrew a few years ago, and it was definately not hardened and there was a some slop between the ballscrew and the nut, as I could vibrate...

FYI: Roton Ballscrews have an error margin of 15 mills per inch. Roton ballscrews are not hardened and will wear quicker.

FWIW: If you need any precision you also need to change out the lead screws to get rid of backlash. Perhaps if you add digital scales to the axises that can be interfaced with the controller, you...

Its a good idea to center-punch your starting point so the drill has an accurate starting point. Then use a hole center-finder in your chuck to make sure its dead on. Any deflection in the drill,...

Integers can be used to for decimal numbers by simply using multiplication. For instance 1.000 can be represented as 1000. for three decimal places. Floating point has issues since its rounded off. A...

I believe either its a modifed R8 spindle to work with retention knobs, or its uses an R8 pneumatic drawbar.

FYI: Tormach offers BT30 spindles as an option:
PCNC 1100 CNC Milling Machine Specifications
BT30 Spindle Cartridge | Tormach LLC providers of personal small CNC machines, CNC tooling, and many...

These parts can indeed be made fairly quickly on a manual mill. A rotory table with a four jaw chuck can be used to machine the round stud instead of purchasing a lathe. A few jigs could be used to...

Does it allows jump in the same location, assuming you restart the program from the beginnning, or does it jump randomly? If its random it could be electrical noise, when another piece of equipment...

Is there any play in the Ballscrew between the bearings. Can you jiggle the ballscrew?

I am no expert, but could the work piece be hardended or it was mis-labled and the material is a much harder alloy? Could the coolant pressure be too low, preventing the chips from being removed...

Yes you can use standard end-mills for alum., The specialize end-mill for alum. are optimized so you can run at faster speeds. If you need max. performance (ie reduce machining time by increasing...

Yes you can use some end-mills for drilling holes, but its not very economical. If you need to drill dozens of holes, its more practical to use drills instead, You can buy end mills with a 90 degree...

End mill size depends on the size of the cuts your making and how small the corners are. If you need to cut a part with very fine detail than a smaller end-mill is required. However larger end-mills...

I think you are grossly underestimating the risks you are taking You will be harassed by the ATF. Expect to spend the majority of your profits and your free time dealing with the ATF and legal...

Precision Mechanical Components Timing Belts Pulleys Spur Gears Couplings Bearings Sprockets Retaining Rings Brakes Helical Gears Clutches Universal Joints

One small comment. If you plan on connecting your spindle to the servo, you will need to use timing belts to operate properly with an encoder. I am assuming the purpose of the servo is so you can...

A Few thoughts:

1. A chemical you can apply to concrete that will have the desired effect without the excessive amount of power washing to wear the concrete away.

Etching Techniques for...

Yes, But you would need a controller to do this. Either a PC or a Microcontroller (aka Arduino). You would need to program the controller to perform the functions you need and configure it with...

Just the basics on measuring, drilling, Milling and turning. Nine or ten videos:
MIT TechTV ? Machine Shop 1

For a simple project, make a Milling clamp with a serrated\step edge.
Another simple...

Its possible the angle could cause a problem. Can the encoder shift? ie does it wiggle if you try to turn it with your fingers? It could be that its shifting when you can directions causing the...

Probably because your not pecking and the drill bit is wandering. To drill straight holes you need to peck every dozen or so mills.

You can buy just a Tormach spindle and build your own head to mount the spindle. There is a page to order just the Spindle on the Website (Replacement parts)The Tormach Head is cast Iron and...

You can buy spindles or full heads from Tormach. I believe the spindles (frame or motor) is about $600 to $800 USD. I think the full heads including 3-ph motors are arround $2K to $3K. They sell R8,...

FWIW: HSS or Cobalt Countersinks for Alum may be a better option to avoid chatter and will likely have a better finish than Carbide. That said a constant even pressure will help reduce chatter. If...

Another issue I would like to bring up is that router cnc's are not setup for coolant. if your going to be removing a lot of material you will need coolant. Adding a coolant system may present...

FWIW: I can't claim to be an expert (closer to a novice!) but I can't imagine finding a machine with that size work area under $10K. $20K is probably a reasonable low-cost budget. At best you may...

Not really. Stranded wire is used to make the cable more flexible and is less likely to kink in tight radiuses. Shielded cable is not related to the type of wire used. A shielded cable with have a...

FWIW: I doubt a filter will work. Even clamped or clipped transients probably will still cause a problem. I think he already has a filter. I recall seeing a Sola ferroresonant transform in his...

FWIW: I am (slowly) working on a machine in similar size, but I think one issue you have not discussed is: weight. A machine of that size will weigh close to a ton for cutting steel. since you need...