VIDEO demo of the 4th axis working.
 

Still need to find a good way to mount the chuck.

Any thoughts as to whether this table/chuck combo is too heavy for the
milling table?

Here's the video for your entertainment

http://www.youtube.com/watch?v=ag3XjCAXP14

Taken with my Android cellphone

i

VIDEO demo of the 4th axis working.
 

Ignoramus17662 fired this volley in
:

http://www.youtube.com/watch?v=ag3XjCAXP14

That's really cool, Ig, but you need to do something about those servo
drives. They were singing so bad, they sounded like they were playing some
weird Balkan music on an accordion.

LLoyd

VIDEO demo of the 4th axis working.
 

On 2011-01-31, Lloyd E. Sponenburgh lloydspinsidemindspring.com wrote:
Ignoramus17662 fired this volley in
:

http://www.youtube.com/watch?v=ag3XjCAXP14

That's really cool, Ig, but you need to do something about those servo
drives. They were singing so bad, they sounded like they were playing some
weird Balkan music on an accordion.

Check THIS out Lloyd. CNC router playing Metallica with the stepper
motor.

http://www.youtube.com/watch?v=w1_h_LNCJ94

i

VIDEO demo of the 4th axis working.
 

Ignoramus4844 fired this volley in
:

http://www.youtube.com/watch?v=w1_h_LNCJ94

Heh!

hey, Ig... gotta question.

Which tool holders does your mill take? I want to mount a 6" lathe chuck
on my NMTB30 spindle. I really don't want to sacrifice one of the few
collet holders I have. So far, I've been using a 3/4" collet with 3/4"
stock for fooling with the lathe ops. Now I'm ready to tool up.

Looking for parts...

LLoyd

VIDEO demo of the 4th axis working.
 

Ignoramus17662 wrote:

Still need to find a good way to mount the chuck.

Any thoughts as to whether this table/chuck combo is too heavy for the
milling table?

What's the table rating? The series 1 manual Bridgeports have a 500#
table load rating I believe, I expect a series 2 CNC is at least 500#
rating, possibly a bit more with the pneumatic counterbalance.

VIDEO demo of the 4th axis working.
 

On 2011-01-31, Lloyd E. Sponenburgh lloydspinsidemindspring.com wrote:
Ignoramus4844 fired this volley in
:

http://www.youtube.com/watch?v=w1_h_LNCJ94

Heh!

hey, Ig... gotta question.

Which tool holders does your mill take?

Erickson QC30

I want to mount a 6" lathe chuck on my NMTB30 spindle. I really
don't want to sacrifice one of the few collet holders I have. So
far, I've been using a 3/4" collet with 3/4" stock for fooling with
the lathe ops. Now I'm ready to tool up.

What I did was, I used a QC30 tool holder with a thick "neck" for a
large diameter end mill, 3/4 or so, I do not remember. I took a round
piece of steel, bored it on the mill to the diameter of the "neck",
and drilled holes to bolt on the chuck later.

Then I put the bored round piece on the toolholder and welded it with
7018.

It was not exactly straight, as I expected. But then I put the
toolholder into the spindle, spun it, and trued it as it was mounted,
which, not surprisingly, gave an excellent result.

http://igor.chudov.com/projects/Brid...1-Lathe-Chuck/

i

VIDEO demo of the 4th axis working.
 

On 2011-01-31, Pete C. wrote:

Ignoramus17662 wrote:

Still need to find a good way to mount the chuck.

Any thoughts as to whether this table/chuck combo is too heavy for the
milling table?

What's the table rating? The series 1 manual Bridgeports have a 500#
table load rating I believe, I expect a series 2 CNC is at least 500#
rating, possibly a bit more with the pneumatic counterbalance.

It says "990 lbs centrally loaded".

i

VIDEO demo of the 4th axis working.
 

Ignoramus4844 fired this volley in
:

It was not exactly straight, as I expected. But then I put the
toolholder into the spindle, spun it, and trued it as it was mounted,
which, not surprisingly, gave an excellent result.


OK... I'm with you on most of it, but I must assume it was a backing
plate-mounted chuck; no? yes?

Tell me about the truing process. I have only ever mounted one backing
plate chuck (on a lathe, not a flippy little spindle adaptor), and it
took me most of a day to get it within a half-thou.

And I still don't understand how one would take up mere tenths of conical
variance when shims and such aren't available thinner than about 0.001".

In my case (the usual, I assume), I trued the plate to the lathe first,
assuming the chuck would bottom-out conically at least as true as the
spindle run-out. Then I only trued to center, not conical alignment.

I guess I could true the "boss" on the mill the same way, but I'm
wondering how you went about it. And, how to ensure the bolting-down
doesn't creep with excessive loading.

LLoyd


LLoyd

VIDEO demo of the 4th axis working.
 

On 2011-01-31, Lloyd E. Sponenburgh lloydspinsidemindspring.com wrote:
Ignoramus4844 fired this volley in
:

It was not exactly straight, as I expected. But then I put the
toolholder into the spindle, spun it, and trued it as it was mounted,
which, not surprisingly, gave an excellent result.


OK... I'm with you on most of it, but I must assume it was a backing
plate-mounted chuck; no? yes?

Yes, backplate mounted.


Tell me about the truing process. I have only ever mounted one backing
plate chuck (on a lathe, not a flippy little spindle adaptor), and it
took me most of a day to get it within a half-thou.

And I still don't understand how one would take up mere tenths of conical
variance when shims and such aren't available thinner than about 0.001".

In my case (the usual, I assume), I trued the plate to the lathe first,
assuming the chuck would bottom-out conically at least as true as the
spindle run-out. Then I only trued to center, not conical alignment.

I guess I could true the "boss" on the mill the same way, but I'm
wondering how you went about it. And, how to ensure the bolting-down
doesn't creep with excessive loading.

I did the boss on the mill to, the whole works, taking off only a
minute amount of material.

i

VIDEO demo of the 4th axis working.
 

Ignoramus4844 fired this volley in
:

I did the boss on the mill to, the whole works, taking off only a
minute amount of material.


Thanks. I have the skills, but not the experience. Next to get the parts.

Your chuck seems a little small for my work. I'm going with a 3-jaw 6".

LLoyd

VIDEO demo of the 4th axis working.
 

On 2011-02-01, Lloyd E. Sponenburgh lloydspinsidemindspring.com wrote:
Ignoramus4844 fired this volley in
:

I did the boss on the mill to, the whole works, taking off only a
minute amount of material.


Thanks. I have the skills, but not the experience. Next to get the parts.

Your chuck seems a little small for my work. I'm going with a 3-jaw 6".

LLoyd

I ended up selecting 3", just because I was afraid that the sipndle
and toolholder have their limits, and I did not want to exceed them.

i