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If you use acid to remove the tap, make sure you don't have _any_ steel parts nearby, or they will rust. The fumes from this process make everything rust.

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I'm getting ready to wire up my KFlop/KAnalog to my DMM Dyn3 drives for a 3-axis mill. My intention is to run the drives in torque control, as everything I've read says that is the best, highest...

Time for another update.

I have nearly all the mechanical design done for the servo and ball screw supports....

What are folk's thoughts on pulley material choice for positioning duties on a milling machine? My machine is a slightly bigger than RF45 bedmill, with 0.75 kW servos. Steel would seem...

DMM tech support answered this question for me. It's a bit embarrassing, as an engineer, as I should have noted the servos name plate power is 200 V. DC machines tend to have a linear relationship...

I was bench testing my DYN3s and 750W DST servos last night with the drive tuning software. Servos on the bench, no load. Power was with only 120 V, as I wasn't in my shop near 240 outlets. When...

I'm building a CNC system for a RF45 clone (Opti BF 46). About a year ago, I bought a 3 axis system from DMM; Dyn3 drives and 750 W DST servos. I'm finally finding time to start building the system....

3D printed, nice! Also, jealous.

Dan:

The electrical schematic you attached, earlier, does match that of my machine. FYI - two of the limit switches you questioned are for a tapping mode, where in the spindle automatically...

It's been almost 8 months since my last update, and unfortunately, I don't have much to report on the subject of the CNC conversion. About the only progress I made was to get my glass scales and DRO...

Hey Dan,

Yes, I am building my mill with a KFLOP and KANALOG. I've made little progress on the CNC side, as I poured all my time and efforts into building a proper shop to house everything. ...

Ahh, doing that in motored operation makes much more sense! You can see where I was confused, thinking about doing it under power.

-Steve

Thanks Al. I don't have any differential probes, so my scope common reference will basically be a short to ground through those 1k resistors and the scope's ground traces. At the name plate 230 V,...

I have a good 4 channel scope. If I record the signal on one or all three legs, can that be used to tell AC vs BLDC, and/or pole count? That would be quite an easy measurement for me to get.
...

Hi Harish,

I'm working towards a CNC conversion on a BF46 too, and have a few questions for you.
-Which rated speed of each servo did you buy? Assuming the YouTube video is of max rapids, I'm...

I have a bed mill that I'm doing a CNC conversion on. The mill came with a 3 hp spindle motor and a built in drive. The drive is a proprietary unit, and the manufacturer won't provide any details...

10 thou per inch?! That would flat out piss me off. I hope you get her straightened out.

I think I'll just leave my machine alone for now, then, and see how stable it stays after making some...

It is obviously a very subjective question, and I'll hear opinions ranging from perfect to don't expect better than 0.001 in/in. I've done some searching and haven't seen much discussion on what is...

It has been some time since I've updated my build thread, and progress has been slow. I was able to get the mill stand fabricated, and after all the welding, I put it on a big horizontal mill and...

I have the same table and agree, the tilt does move too fast. So fast, it makes the handwheel stiff. When I get around to putting steppers or servos on mine, the tilting axis will definitely get a...

One other question - can you use different relief angle inserts in the same tool? I've found some 7° inserts that are non-ferrous rated (RCxT). I'm guessing no, but haven't found the answer with...

Apparently I didn't do enough research before buying my first shell mill and arbor. I naively assumed you could easily find inserts in any given shape for aluminum and separate inserts for steel. ...

More beautiful parts arrived today. Guess my work is cut out for me. [emoji4]

The thread would probably be better served in either a Tooling or Hobby Project sub-forum. IMHO.

-Steve

If need be, if I had a cart next to the mill at about table height, I could muscle it on. I don't have any problems with my 6" machine vice, and this is only 30% more :)

Realistically, I'll...

FYI, I decided to go with an 8" table, and gave Utoole a call to see if freight shipping was possible to save on the $100 UPS quote. They told me they are currently out of 8" units, and more are due...

Even if they had a spec (which I doubt, but I didn't look), their stepper only turns the table at 5 RPM, hardly flying. My primary reason for the table is to spiral flute pistol barrels, so,...

The motion control system I'm building is run by a Dynomotion Kflop, which can use a mix of steppers and servos. I'm building the mill's controls with brushless DC.
Shameless self promotion: my...

I do intend to CNC it at some point, if not just to prove to myself that my mill (Optimum BF46) doesn't have the accuracy to make a 5-axis part worth a damn. When someone tells me I can't do...

Yes, I am definitely getting one, despite not even having a stand built for my mill yet, much less having it CNC'ed. :)

I'm trying to decide between the 6" and the 8". The 8" carries a $100...