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I found a dirt-cheap dual Procunier tapping head; it's a dual tapping head that comes with at least 2 collets.

Before I buy it, I'd like to know if I can use it to thread only one hole at a...

More info added to the schematic.

schematic on picasa

Still have to add the (optional) 4th axis on it though.

The only point that seems to be to resolve is twofold:

a) Is the tach...

Okay, so since the power supply required voltage is equal to the square root of the inductance in milihenrys times 32 (V=32*sqrt(L) ), a 50V stepper has an inductance of around 2.5 milihenrys.
...

Out of pure luck, while searching again for info on the KBCC's (serendipity rules!), I stumbled upon a thread by Hoss (well, it was in one of his threads and I think he was the one saying that) where...

Added some missing wires (one can play the "7 differences" game with the previous diagram :-) ) and then changed some signals to prevent the need for one more channel.
...

Got a used SERVO TEK SA-757A-2 tach for a-bit-too-much on fleebay. It's a 7V/1000RPM so it's a direct matched with the KBCC-125R.

One thing solved. That way the motor will be regulated to within...

Long time not updating this thread, I took the time to read much on the subject.

I bought a KBCC-125R and I'm about to buy a 7V/1000RPM DC tach for the controller feedback; this way I'll be able...

Improved diagram, with charge pump EN for the KBCC and DC tach:

graph on picasa

So as it goes, improved circuit, with charge pump enable for the KBCC and DC tach:

https://lh4.googleusercontent.com/-u-IevOMyPaM/UX1gkj--_jI/AAAAAAAAAWA/gN8DyM0qIGw/s1016/bf-20-cnc+-enable.png

Ah-ha!

Finally found this thread where they say one can use a 24V DC motor (high quality, like Maxon motors). Found one for 35$ on fleebay, way better than fiddling around with my uncertain...

Hi JB.

Thanks again for your reply.

I'll be using a CNC4PC C3 tach/index to get the RPM on-screen (and hopefully to add rigid tapping ability to the mill).

I was referring to the...

By the way, I looked at 7v/1000rpm or 50v/1000rpm DC tachs (the KBCC accepts both without too much trouble, other voltage range/rpm need a little bit of tinkering) and it looks like they're made of...

Thanks 109jb!

This is the logic wiring, your point is noted though. Anyway with the way I thought I'd build the control box, it was already headed that way. Now I'll make doubly certain :-)
...

After a long time searching the 'net, reading around & letting the ideas sit, I came out with a new, hopefully cleaner, system. I chose a CNC4PC C11G breakout board (which seems popular and has a few...

After a long time searching the 'net, reading around & letting the ideas sit, I came out with a new, hopefully cleaner, system. I chose a CNC4PC C11G breakout board (which seems popular and has a...

Ok, so after some time tinkering with numbers and websites, here's where I am now:




Grizzly GO463 6X21 Mill/drill (Sieg X3) incl tax/shipping 1 ...

Thanks Glenn. IT'll be a tight fit and I'll have to move a wall and remove a door but that'll fit :) Unless I move my bench and use this space. Anyway it's a matter of internal governance :D
...

Hi.

I'll try and post here, since it's the only place I can figure out (if there's a better forum for this question, please point it out so I'll post there instead).

I'm planning an X3...

Okay, here's the schematic.

https://lh6.googleusercontent.com/_IJ4ToBJe1tQ/TZPVi2o3WzI/AAAAAAAAAMk/WiRlmwizOHg/s720/circuitry3.PNG

Could anybody comment if it's really better (e.g: safer) or...

Looks like this thread hits the jackpot:

X3 spindle control

Here's the board.

Here's the selection chart.

Sooooo....

So? any ideas on how I should connect the board to the motor?

I thought about a latching relay, dual coils, works like a j/k flip-flop; one coil must be "off" and the other "on" to get the relay...

Ok, now it's definitely time to go to bed :-)

I think I found something interesting about the controller:



Soooo... I'll try to think about it tomorrow, but I can already get a clearer...

Hi Glenn!

Yes, if you can provide me with the minimum working area (e.g: just the machine, I'll figure the "walk around space" needed).

As you can see I'm now starting to plan the...

Thanks cornbinder.

I looked at your page and all I can say is wow! what a nice machine you're building!

I hope mine will get 1/10th as nice as yours; I'd be quite happy.

I re-read the...

Thanks cornbinder; I already thought about getting this pulley kit. (and duly noted that information in my OpenOffice Calc spreadsheet so it won't be forgotten).

Reassuring to know others have...

Okay, objection noted.

I also noted that I screwed up in my drawing as the power to the motor comes from the 12V relay P/S, not from the motor controller (bummer!)

In fact, the more I look at...

I finally set my mind on a GO463, being 300-500$ less expensive than exact replicas (Sieg) bought in Canada, and that's after factoring in shipping, duty, taxes and brokerage, paypal fees and then a...

Hey bud! How are you? I replied to your post on my thread, I don't know if you read that.

Looks like I'll look at your thread quite often, as I'm looking forward to do the same conversion. :)
...

Hiya!

Yep, that's me from HBF.

Haven't got the weather to try the 2-speed yet :P I'll wait 'til weather's back in the 10C (50F) before I break-in my new ESP 30.5.

Still shopping for a mill,...

By the way, I'll have to prepare the beast's den; how much space does a Sieg X3/Syil X4 take? Let say I have a spot where a mill would fit nicely, it's like an alcove. front to back size is not...