Needing more than a spark test?

graham-xrf said:
I am trying to figure how to drill the tilted holes.
Click to expand...
One way to do that is to use a dividing head and tilt it upwards. It would be ok for small holes or "ginger" machining. Or just print the thing...
 
WobblyHand said:
One way to do that is to use a dividing head and tilt it upwards. It would be ok for small holes or "ginger" machining. Or just print the thing...
Click to expand...
No printer - and I have to do a fair amount or research to invest in one.
Also - I am in the UK, which right now has a thoroughly broken import-export imagined relationship with the rest of the planet.
I find it hard to imagine a more complete proffered incompetence from our supposed most important people when it comes to getting quite basic stuff arranged!

Getting my head around it. I have to tilt the whole rotary, and not the collet block in it?
Hmm.. thinking on it - yes. Tilt the whole rotary. That's the only way the hole always presents itself upwards.

BUT - naughty thought! My mill has a settable tilting head. The rotary can be set down on the table flat, with the work pointing straight upwards.
Rotate 60° (or 45°) between holes. That said, I can feel it in my bones that this may need a "practice run".
 
homebrewed said:
Both boards are inside the aluminum enclosure I made. If I open the enclosure up, I DO see line interference on the output.

I'm pretty sure I have some interaction between the two boards though. If they're too close together the output goes into oscillation!
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That is heartening! :)
I know it sounds perverse, but having something like that happen, or not, depending if shielded, is a great diagnostic.
It lets one know that it is doing something expected, even if unwanted when all put together. :)
 
graham-xrf said:
No printer - and I have to do a fair amount or research to invest in one.
Also - I am in the UK, which right now has a thoroughly broken import-export imagined relationship with the rest of the planet.
I find it hard to imagine a more complete proffered incompetence from our supposed most important people when it comes to getting quite basic stuff arranged!

Getting my head around it. I have to tilt the whole rotary, and not the collet block in it?
Hmm.. thinking on it - yes. Tilt the whole rotary. That's the only way the hole always presents itself upwards.

BUT - naughty thought! My mill has a settable tilting head. The rotary can be set down on the table flat, with the work pointing straight upwards.
Rotate 60° (or 45°) between holes. That said, I can feel it in my bones that this may need a "practice run".
Click to expand...
I only took the printer plunge recently. Spent far too much time agonizing over it. There's a whole another learning curve to to as well. But it has been quite useful, so I'm happy with it. At the moment, it is more advanced than I am!

Yes, you need to tilt the rotary table.

Laughing, yes, you will need a practice run. At least I did.
 
homebrewed said:
The current discussions regarding the pocket geiger circuit are all good. A different implementation of the front end would be very instructive. Or perhaps "illuminating" is a more appropriate description :).
Click to expand...
It may not be long. I am untangling some of it now. I will post the stuff here when I am more sure of it.
 
graham-xrf said:
Before I resort to that, I am going to try tilting the whole mill head, after all, that is one of it's "features".
Click to expand...
Remember that you have to tram it back! Don't know how easy your mill is to line up.
 
WobblyHand said:
Remember that you have to tram it back! Don't know how easy your mill is to line up.
Click to expand...
That is exactly why I resist like hell messing with it. It's not like a solid Bridgeport where you can tilt to an angle, and later set it back, and casually expect the tramming will still be good. I saw it happen, though I should say the guy working the machine was also surprised. To quote him..
"Hey what- how lucky can you get"? :)

I have not played with the Cormack enough yet to break even one end-mill, although having HSS ones go blunt does happen.
As you may guess, I have not had a whole lot of experience with machining!
 
@WobblyHand
Do tell about the printer. We can maybe benefit from some of your agonizing.
I mean, what model, and how hurtful to the wallet?
 
graham-xrf said:
That is exactly why I resist like hell messing with it. It's not like a solid Bridgeport where you can tilt to an angle, and later set it back, and casually expect the tramming will still be good. I saw it happen, though I should say the guy working the machine was also surprised. To quote him..
"Hey what- how lucky can you get"? :)

I have not played with the Cormack enough yet to break even one end-mill, although having HSS ones go blunt does happen.
As you may guess, I have not had a whole lot of experience with machining!
Click to expand...
That's why I mentioned it, because there's quite a few stories about getting a mill back in tram.

I've busted a couple of things now, like a slitting saw, a small carbide end mill, and a small drill bit. The slitting saw surprised me, it just started tracking off in the wrong direction, by the time I figured it out, it snapped. The drill bit surprised me as well, everything was locked down in the mill, yet it snapped. I wasn't abusing it, have to conclude the bit had a flaw.
 
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