Re: [Emc-users] R2E3 retrofit finally in production

[gene heskett]

On 11/18/22 19:20, Jon Elson wrote:
Well, I wanted to give an update.  I finally ran some production parts 
on my retrofitted R2E3.


I had some issues with the spindle VFD causing communication errors 
between the PC and my PPMC boards, and fixed that by running a ground 
wire between the PC and the PPMC card cage. Then, I had an issue with 
the spindle encoder not producing the index pulse.  It turns out the 
centering of the encoder body to the shaft is very critical.  I bored 
out the mounting holes about .003" bigger and found the sweet spot for 
it.  And, I rigid tapped 216 holes with a combo drill-tap at 1000 RPM!  
I'm still collecting enough Kwik Switch 200 tooling to be fully set up.


Jon

I've not had any trouble with that as I ignore the index from the omron 
encoder on the motors back shaft, instead using a screw glued to the 
side of the spindle to trip an ATS-667 hall effect for an index pulse. I 
scale change from the tally switches on the gearshift knob. So my tach 
display is dead accurate in either gear. I say dead accurate, the scale 
was determined by subtracting the encoder count at 3 turns from the 
encoder count at 103 turns and dividing that by shifting the decimal 
point two digits left, instant 1% accuracy in either gear.


I finally did find my round tuit and measured my column tilt, worst case 
was x, off about 3 thou in the height of that circular square, so my 
major error is tramming related. On the go704, that tilt is very hard to 
correct, no vernier available.



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Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 



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[Emc-users] R2E3 retrofit finally in production

[Jon Elson]

Well, I wanted to give an update.  I finally ran some 
production parts on my retrofitted R2E3.


I had some issues with the spindle VFD causing communication 
errors between the PC and my PPMC boards, and fixed that by 
running a ground wire between the PC and the PPMC card cage. 
Then, I had an issue with the spindle encoder not producing 
the index pulse.  It turns out the centering of the encoder 
body to the shaft is very critical.  I bored out the 
mounting holes about .003" bigger and found the sweet spot 
for it.  And, I rigid tapped 216 holes with a combo 
drill-tap at 1000 RPM!  I'm still collecting enough Kwik 
Switch 200 tooling to be fully set up.


Jon



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Re: [Emc-users] R2E3 retrofit

[Jon Elson]

On 7/11/22 14:57, linux...@rodes.biz wrote:
  


Jon,

I'm working with older AMC analog drives now.   25A20's

What is the full part number of your drives?   Is it an 30A20AC ?

I like the AMC drive, even though I am having tuning problems (I think it is
the particular drive and/or motor.)
They do have a minimum motor inductance.  My motors turned 
out to be well above the minimum.


I now have 2 ea AMC 30A20ACV servo amps, all tuned and 
running with LinuxCNC.


I'm still waiting for another unit to show up on eBay.  I 
also have the Estop wired, and a spindle encoder installed 
and working.


Jon




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Re: [Emc-users] R2E3 retrofit

[linuxcnc]

 

Jon,

I'm working with older AMC analog drives now.   25A20's

What is the full part number of your drives?   Is it an 30A20AC ?

I like the AMC drive, even though I am having tuning problems (I think it is
the particular drive and/or motor.)

AMC tech support is pretty good.  I've called them several times..  They are
US, PST.

 

Noel.

Walnut Creek, CA

 

 


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Re: [Emc-users] R2E3 retrofit

[Eric Keller]

On Mon, Jul 11, 2022 at 12:36 PM Jon Elson  wrote:

> Is anyone else using AMC 30A20 servo amps?

I have used one of the 30A20AC drives, and there was another used to
pump hydraulic fluid at work.  Both of those came with heat sinks from
the factory.  Neither got particularly hot. I think I would still add
a heat sink.
Eric Keller
Boalsburg Pennsylvania


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Re: [Emc-users] R2E3 retrofit

[gene heskett]

On 7/11/22 12:34, Jon Elson wrote:

Hello,

Is anyone else using AMC 30A20 servo amps?  I now have two of these, 
waiting for another one to show up on eBay for a decent price.  How 
hot do these run?  The first one I got had no heat sink, the 2nd one 
had a heat sink with gigantic fins 1" tall. But, there was no heat 
sink grease on that one, which is kind of crazy.  So, I'm wondering if 
I even need a heat sink?  I do have some heat sink extrusion that is 
just the right width, and the fins are not so tall, so I can pack the 
amps closer together.  The datasheet shows 143 W dissipation at 
continuous rated output current, but I wonder how that averages out in 
typical milling machine applications?


Any thoughts?

Thanks,

Jon

In the FWIW category Jon, 143 watts at full song says they almost have 
to be ancient analog designs.

With electrolytic caps that are probably well past their use by date.

Whereas your own pwm-servo I've got 3 of, doesn't run anywhere near that 
much heat in normal
operation spinning a spindle motor. Ultrasonic switch mode stuff doesn't 
make a lot of heat.
 I don't want to guess at the knee weight  on the b-port, but the xy 
can be handled with a pair of
the 3NM 3 phase stepper/servo's, by direct drive to the screw. Ought to 
be able to get 100 IPM for

rapids.

Are you going to motorize the quill too? It can move faster than the 
knee in most cases but with

limited travel.

Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 



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Re: [Emc-users] R2E3 retrofit

[Jon Elson]

Hello,

Is anyone else using AMC 30A20 servo amps?  I now have two 
of these, waiting for another one to show up on eBay for a 
decent price.  How hot do these run?  The first one I got 
had no heat sink, the 2nd one had a heat sink with gigantic 
fins 1" tall. But, there was no heat sink grease on that 
one, which is kind of crazy.  So, I'm wondering if I even 
need a heat sink?  I do have some heat sink extrusion that 
is just the right width, and the fins are not so tall, so I 
can pack the amps closer together.  The datasheet shows 143 
W dissipation at continuous rated output current, but I 
wonder how that averages out in typical milling machine 
applications?


Any thoughts?

Thanks,

Jon



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Re: [Emc-users] R2E3 retrofit

[John Dammeyer]

> From: andy pugh [mailto:bodge...@gmail.com]
> On Thu, 7 Jul 2022 at 21:48, Jon Elson  wrote:
> 
> > Doing some calculations on that, I get that 30A (peak
> > rating) will get 5110 Lbs linear force on every axis.  I
> > guess this is needed to get good acceleration on the XY axes
> > due to mass of table and saddle, but that seems VERY
> > dangerous to the spindle bearings.
> 
> I think you might be underestimating the bearings.
> 
> If we assume that they are 40mm bore angular contact bearings:
> 
> https://simplybearings.co.uk/shop/p20530065/UKF-719USS40A21I1L-Super-Precision-Angular-Contact-
> Spindle-Bearing-40x62x12mm/product_info.html
> 
> Rated dynamic load (for a single bearing) is 10,800N or 2500lbf.
> 
> So you wouldn't want to go to 5000 bushel-cubits[1] very often, but
> it's not orders of magnitude out.
> 
> [1] Don't bother, it's not dimensionally correct,
> 
At least you aren't using the antiquated Furlongs per Fortnight.



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Re: [Emc-users] R2E3 retrofit

[andy pugh]

On Thu, 7 Jul 2022 at 21:48, Jon Elson  wrote:

> Doing some calculations on that, I get that 30A (peak
> rating) will get 5110 Lbs linear force on every axis.  I
> guess this is needed to get good acceleration on the XY axes
> due to mass of table and saddle, but that seems VERY
> dangerous to the spindle bearings.

I think you might be underestimating the bearings.

If we assume that they are 40mm bore angular contact bearings:

https://simplybearings.co.uk/shop/p20530065/UKF-719USS40A21I1L-Super-Precision-Angular-Contact-Spindle-Bearing-40x62x12mm/product_info.html

Rated dynamic load (for a single bearing) is 10,800N or 2500lbf.

So you wouldn't want to go to 5000 bushel-cubits[1] very often, but
it's not orders of magnitude out.

[1] Don't bother, it's not dimensionally correct,

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1912


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Re: [Emc-users] R2E3 retrofit

[Jon Elson]

On 7/4/22 11:12, Jon Elson wrote:
I have managed to get two AMC 30A20 servo amps on eBay, 
one relatively cheap, the other somewhat expensive.  Now, 
I need a 3rd.  These are 30A peak 15 A continuous, up to 
180 V DC input.


These match the current specs of the NC400's that came 
with the machine.  But, for the Z axis, maybe less current 
would be fine. I'm guessing that 30 A into those motors 
with a 2:1 belt reduction would likely give 1000 Lbs of 
linear force on the table.  It seems that would be enough 
to damage the spindle bearings.  I have no way to know 
what the current limit on the existing Z amp was set to, 
but I am assuming it was set quite a bit less.  So, I'm 
looking at an AMC 16A20 amp for the Z (16 A peak 8A 
continuous).


One data point, on my old 1J head machine, the power 
downfeed was set to kick out at 200 Lbs.  I have no idea 
what the limits of the BOSS 8 machine are, but I would 
guess they sure don't want more than about 500 Lbs linear 
force on the spindle bearings.  Am I on the right track? 


YIKES!  I did the measurement of motor torque at the 
leadscrew, and with 3 Amps applied, I got 10 Lbs force on a 
fish scale at 1.625" radius.  (There's a 2:1 reduction 
between motor and leadscrew.)


Doing some calculations on that, I get that 30A (peak 
rating) will get 5110 Lbs linear force on every axis.  I 
guess this is needed to get good acceleration on the XY axes 
due to mass of table and saddle, but that seems VERY 
dangerous to the spindle bearings.  So, I think I answered 
my own question that the lower-rated servo amp should be 
totally sufficient for the Z motor.  I did measure the pots 
on the old servo amps and they seemed to all be turned up to 
full current limit.


Jon



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Re: [Emc-users] R2E3 retrofit

[gene heskett]

On 7/5/22 07:57, andy pugh wrote:

On Mon, 4 Jul 2022 at 17:15, Jon Elson  wrote:


So, I'm looking at an AMC 16A20
amp for the Z (16 A peak 8A continuous).

Have you thought about using a Pico-systems servo amp?
(Or is the voltage too high?)


I'm using 2 of those PWM-Servo's to drive spindle motors to around 3x their
rated power. With current limits of around 17 amps, running at 126 volts 
dc,

but peaking during a direction reversal (rigid tapping) at 165-170 volts,
for years now.

Zero problems. You make good stuff Jon.

Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 



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Re: [Emc-users] R2E3 retrofit

[andy pugh]

On Mon, 4 Jul 2022 at 17:15, Jon Elson  wrote:

> So, I'm looking at an AMC 16A20
> amp for the Z (16 A peak 8A continuous).

Have you thought about using a Pico-systems servo amp?
(Or is the voltage too high?)


-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1912


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Re: [Emc-users] R2E3 retrofit

[Jon Elson]

I have managed to get two AMC 30A20 servo amps on eBay, one 
relatively cheap, the other somewhat expensive.  Now, I need 
a 3rd.  These are 30A peak 15 A continuous, up to 180 V DC 
input.


These match the current specs of the NC400's that came with 
the machine.  But, for the Z axis, maybe less current would 
be fine. I'm guessing that 30 A into those motors with a 2:1 
belt reduction would likely give 1000 Lbs of linear force on 
the table.  It seems that would be enough to damage the 
spindle bearings.  I have no way to know what the current 
limit on the existing Z amp was set to, but I am assuming it 
was set quite a bit less.  So, I'm looking at an AMC 16A20 
amp for the Z (16 A peak 8A continuous).


One data point, on my old 1J head machine, the power 
downfeed was set to kick out at 200 Lbs.  I have no idea 
what the limits of the BOSS 8 machine are, but I would guess 
they sure don't want more than about 500 Lbs linear force on 
the spindle bearings.  Am I on the right track?


Thanks,

Jon




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Re: [Emc-users] R2E3 retrofit

[Jon Elson]

Now, using the engine crane I managed to get the table off 
and have access to the metering orifices, all EIGHT of 
them.  I will have to order them from Bijur.


Jon



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Re: [Emc-users] R2E3 retrofit

[John Dammeyer]

Hi Jon,
Last year I bought a stepper motor driver off Amazon that had an annoying 
whine.  And it was one of the more popular brands.  Couldn't stand it. 

I contacted Bergerda in China, who's servos and drives I now use, and asked if 
their stepper drivers had the same problem since the outside of the box looked 
the same.   Got an interesting response about companies that copy and resell at 
much lower costs over there.

So since I wanted a new servo for the knee motor on my mill I had him also 
include a couple of stepper drives.  And yes, the inside of the box is 
dramatically different.   Now that's the steppers of course.

The servo drives from Bergerda do not make the motors I have whine.  They claim 
that many of the cheaper motor/drive combinations also cut corners on things 
like encoders.  Donald Chen at Bergerda told me they use the more expensive 
Japanese encoders.   So I pulled a motor apart and looked up some numbers and 
did some googling.  Sure enough they are Japanese products but made in China.  
So Donald wasn't stretching the truth there.

I've been so impressed with both the support and the quality of the Bergerda 
drives and motors that now my mill is running with those instead of HP_UHU DC 
Servos and Gecko driven Stepper motors.  

The only other drive I have is a STMBL open source drive for the Harmonic 
Drive.  I bought my boards from Andy and finished the assembly here.  It's an 
open source project with reasonable support but not completely turn key.  My 
harmonic drive also doesn't whine.

Depending on voltage an current requirements the STMBL might just be the best 
solution for you.  I'm sure Andy can provide much more detail on how well they 
work.

John

> -Original Message-
> From: Jon Elson [mailto:el...@pico-systems.com]
> Sent: July-02-22 10:36 AM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] R2E3 retrofit
> 
> Well, now that I have all 3 servo amps connected to motors,
> the whine is quite loud, and closing the cabinet makes
> little difference.� My ear protectors are designed not to
> cut voice frequencies, so the 5 KHz goes right through
> them!� Ugh, they have got to go.� I have verified that all 3
> of them work, so I ought to be able to sell them on eBay.�
> The X axis is pretty well stuck, only the ballscrew is
> strong enough to move it.� I guess I will have to loosen the
> gibs and try to lift and slide it off.� Then, I'll be able
> to get into the lube orifices.
> 
> So, a bit more of a job to retrofit than I had been hoping
> for. Of course, depending on 40+ year old servo amps to keep
> on working may not have been a great plan, anyway.� I
> ordered an AMC 30A20 servo amp (30 A peak, 200 V max) on
> eBay, but I only found one at a reasonable price.� Anybody
> know where to look for servo amps? HGR didn't seem to have
> much, but maybe I was using the wrong search terms.
> 
> Thanks,
> 
> Jon
> 
> 
> 
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Re: [Emc-users] R2E3 retrofit

[Jon Elson]

Well, now that I have all 3 servo amps connected to motors, 
the whine is quite loud, and closing the cabinet makes 
little difference.  My ear protectors are designed not to 
cut voice frequencies, so the 5 KHz goes right through 
them!  Ugh, they have got to go.  I have verified that all 3 
of them work, so I ought to be able to sell them on eBay.  
The X axis is pretty well stuck, only the ballscrew is 
strong enough to move it.  I guess I will have to loosen the 
gibs and try to lift and slide it off.  Then, I'll be able 
to get into the lube orifices.


So, a bit more of a job to retrofit than I had been hoping 
for. Of course, depending on 40+ year old servo amps to keep 
on working may not have been a great plan, anyway.  I 
ordered an AMC 30A20 servo amp (30 A peak, 200 V max) on 
eBay, but I only found one at a reasonable price.  Anybody 
know where to look for servo amps? HGR didn't seem to have 
much, but maybe I was using the wrong search terms.


Thanks,

Jon



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Re: [Emc-users] R2E3 retrofit

[N. Christopher Perry]

That’s great to hear Gene.  I’ve daughter thats on the spectrum, which 
constantly worries me.  You’re son’s story strengthens my hope for her.

N. Christopher Perry

> On Jul 2, 2022, at 8:32 AM, gene heskett  wrote:
> 
> On 7/1/22 23:53, Stuart Stevenson wrote:
>> Before - way before - My parents were told by the school I couldn't hear
>> when I was in the 4th grade.
>> No one knew I couldn't hear well. I have learned to cope pretty well.
>> Sometimes, when I 'hear' something I will realize I felt the vibrations on
>> my skin.
> My youngest boy was born deaf. Our clue was that when he was about
> crawling age, he would sit and scream on a concrete floor while playing
> happily on a wood floor. We knew is stomach wasn't right as he lived
> for about the first 5 years on a predigested formula called Neutramagen.
> We hauled him to Mayo and were told his deafness wasn't fixable.
> 
> But time was on our side, and one day when he was about 5 he looked
> up at a piper J3, and said "airplane" as he pointed up.  He finally started
> tolerating normal food in another year.  Mayo said he is a miracle. Today
> he's about 42, and the very well paid head of the maintenance dept at
> a packing plant in south eastern Nebraska, eats anything put in front of
> him and hears better than I do at 87. And I give thanks for that miracle.
> 
> My boys, the 4 that survive, are all doing well.
>>> On Fri, Jul 1, 2022 at 8:06 PM andy pugh  wrote:
>>> 
>>> On Sat, 2 Jul 2022 at 01:46, Stuart Stevenson  wrote:
 oh yeah? with being totally deaf in my left ear and 60% loss in my right
 ear I never heard anything like that!
>>> Before or after the Dah-Lih?
>>> 
>>> --
>>> atp
>>> "A motorcycle is a bicycle with a pandemonium attachment and is
>>> designed for the especial use of mechanical geniuses, daredevils and
>>> lunatics."
>>> — George Fitch, Atlanta Constitution Newspaper, 1912
>>> 
>>> 
>>> ___
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>>> 
>> 
> 
> 
> Cheers, Gene Heskett.
> -- 
> "There are four boxes to be used in defense of liberty:
> soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author, 1940)
> If we desire respect for the law, we must first make the law respectable.
> - Louis D. Brandeis
> Genes Web page 
> 
> 
> 
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Re: [Emc-users] R2E3 retrofit

[gene heskett]

On 7/1/22 23:53, Stuart Stevenson wrote:

Before - way before - My parents were told by the school I couldn't hear
when I was in the 4th grade.
No one knew I couldn't hear well. I have learned to cope pretty well.
Sometimes, when I 'hear' something I will realize I felt the vibrations on
my skin.

My youngest boy was born deaf. Our clue was that when he was about
crawling age, he would sit and scream on a concrete floor while playing
happily on a wood floor. We knew is stomach wasn't right as he lived
for about the first 5 years on a predigested formula called Neutramagen.
We hauled him to Mayo and were told his deafness wasn't fixable.

But time was on our side, and one day when he was about 5 he looked
up at a piper J3, and said "airplane" as he pointed up.  He finally started
tolerating normal food in another year.  Mayo said he is a miracle. Today
he's about 42, and the very well paid head of the maintenance dept at
a packing plant in south eastern Nebraska, eats anything put in front of
him and hears better than I do at 87. And I give thanks for that miracle.

My boys, the 4 that survive, are all doing well.

On Fri, Jul 1, 2022 at 8:06 PM andy pugh  wrote:


On Sat, 2 Jul 2022 at 01:46, Stuart Stevenson  wrote:

oh yeah? with being totally deaf in my left ear and 60% loss in my right
ear I never heard anything like that!

Before or after the Dah-Lih?

--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1912


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Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 



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Re: [Emc-users] R2E3 retrofit

[Stuart Stevenson]

Before - way before - My parents were told by the school I couldn't hear
when I was in the 4th grade.
No one knew I couldn't hear well. I have learned to cope pretty well.
Sometimes, when I 'hear' something I will realize I felt the vibrations on
my skin.

On Fri, Jul 1, 2022 at 8:06 PM andy pugh  wrote:

> On Sat, 2 Jul 2022 at 01:46, Stuart Stevenson  wrote:
> >
> > oh yeah? with being totally deaf in my left ear and 60% loss in my right
> > ear I never heard anything like that!
>
> Before or after the Dah-Lih?
>
> --
> atp
> "A motorcycle is a bicycle with a pandemonium attachment and is
> designed for the especial use of mechanical geniuses, daredevils and
> lunatics."
> — George Fitch, Atlanta Constitution Newspaper, 1912
>
>
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If you are not the addressee then my consent is not given for you to read
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Thank you for honoring my wish.

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Re: [Emc-users] R2E3 retrofit

[andy pugh]

On Sat, 2 Jul 2022 at 03:02, Jon Elson  wrote:

> So, you remember it, too?

I don't think I saw it run, actually.

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1912


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Re: [Emc-users] R2E3 retrofit

[Jon Elson]

On 7/1/22 20:03, andy pugh wrote:

On Sat, 2 Jul 2022 at 01:46, Stuart Stevenson  wrote:

oh yeah? with being totally deaf in my left ear and 60% loss in my right
ear I never heard anything like that!

Before or after the Dah-Lih?


So, you remember it, too?

Jon



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Re: [Emc-users] R2E3 retrofit

[andy pugh]

On Sat, 2 Jul 2022 at 01:46, Stuart Stevenson  wrote:
>
> oh yeah? with being totally deaf in my left ear and 60% loss in my right
> ear I never heard anything like that!

Before or after the Dah-Lih?

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1912


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Re: [Emc-users] R2E3 retrofit

[Stuart Stevenson]

oh yeah? with being totally deaf in my left ear and 60% loss in my right
ear I never heard anything like that!

On Fri, Jul 1, 2022 at 7:30 PM Jon Elson  wrote:

> On 6/26/22 00:13, m...@mattshaver.com wrote:
> > On 2022-06-25 18:30, Jon Elson wrote:
> >> On 6/25/22 15:56, Jon Elson wrote:
> >>> Hello, all,
> >>>
> >>> I just got an R2E3 Bridgeport mill in my basement, and
> >>> will be doing a LinuxCNC retrofit.
> >>>
> >>> I seem to recall the NC400 servo amps create a maddening
> >>> squeal, is that correct, or an I remembering some other
> >>> system?
> >
> > The V2E3 I started with used to squeal mightily when the
> > amps were enabled.
>
> Just an update.  I am jury-rigging power to various things
> and finally got enough stuff set up so I had analog/logic
> power on the servo amps and could put 84 V DC on the power
> section.  I did hear a 5 KHz whine from the one amp that was
> actually connected to a motor, but it was not very loud.
> I'm guessing that with the cabinet closed and fans running,
> it won't be all that bad.  Going from 60 - 84 V did  not
> seem to make it much louder.  I was able to turn the offset
> pot and make it move faster or slower or go the other
> direction.  I'm only moving the Y axis as the lube metering
> orifices seem to be clogged up, and Y is the only one that
> is getting any visible oil.  I have ordered a bunch of
> missing handles, way wipers, Kwik-Switch tooling and a
> bigger VFD.  I think Stuart Stevenson's Dah-Lih at MPM had
> NC400 amps, and the whine was astoundingly loud, even with
> ear protectors on.  I was worried about that, and if it had
> been even 20 dB less than that machine, I would have had to
> replace my servo amps.
>
> Jon
>
>
>
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Re: [Emc-users] R2E3 retrofit

[Jon Elson]

On 6/26/22 00:13, m...@mattshaver.com wrote:

On 2022-06-25 18:30, Jon Elson wrote:

On 6/25/22 15:56, Jon Elson wrote:

Hello, all,

I just got an R2E3 Bridgeport mill in my basement, and 
will be doing a LinuxCNC retrofit.


I seem to recall the NC400 servo amps create a maddening 
squeal, is that correct, or an I remembering some other 
system?


The V2E3 I started with used to squeal mightily when the 
amps were enabled. 


Just an update.  I am jury-rigging power to various things 
and finally got enough stuff set up so I had analog/logic 
power on the servo amps and could put 84 V DC on the power 
section.  I did hear a 5 KHz whine from the one amp that was 
actually connected to a motor, but it was not very loud.  
I'm guessing that with the cabinet closed and fans running, 
it won't be all that bad.  Going from 60 - 84 V did  not 
seem to make it much louder.  I was able to turn the offset 
pot and make it move faster or slower or go the other 
direction.  I'm only moving the Y axis as the lube metering 
orifices seem to be clogged up, and Y is the only one that 
is getting any visible oil.  I have ordered a bunch of 
missing handles, way wipers, Kwik-Switch tooling and a 
bigger VFD.  I think Stuart Stevenson's Dah-Lih at MPM had 
NC400 amps, and the whine was astoundingly loud, even with 
ear protectors on.  I was worried about that, and if it had 
been even 20 dB less than that machine, I would have had to 
replace my servo amps.


Jon



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Re: [Emc-users] R2E3 retrofit

[Sebastian Kuzminsky]

On 6/26/22 01:30, Jon Elson wrote:
I just got an R2E3 Bridgeport mill in my basement, and will be doing a 
LinuxCNC retrofit.


Awesome!


When I bought my Bridgeport R2E3 it came with a bunch of manuals, which 
Stuart Stevenson kindly scanned into PDFs.  I contacted Bridgeport and 
got permission to redistribute them:


http://highlab.com/~seb/bridgeport-r2e3/


The LinuxCNC config for my machine is here:

https://github.com/SebKuzminsky/linuxcnc-config-bridgeport-r2e3


--
Sebastian Kuzminsky


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Re: [Emc-users] R2E3 retrofit

[John Figie]

Sorry wrong link in previous email.

https://photos.app.goo.gl/SCAKjGBhPTQm1NKi9

On Sun, Jun 26, 2022, 7:00 AM John Figie  wrote:

> Here are some pages about removing the motor and head for Series II
> interact 2
>
>
> https://drive.google.com/drive/folders/0B2fj8HWg0FnNX1hjbGJpbTF0bDg?resourcekey=0-taJjv8naI-blsIgoBgwWEg
>
>
> John Figie
>
> On Sun, Jun 26, 2022, 1:11 AM  wrote:
>
>> On 2022-06-25 18:30, Jon Elson wrote:
>> > On 6/25/22 15:56, Jon Elson wrote:
>> >> Hello, all,
>> >>
>> >> I just got an R2E3 Bridgeport mill in my basement, and will be doing a
>> >> LinuxCNC retrofit.
>> >>
>> >> I seem to recall the NC400 servo amps create a maddening squeal, is
>> >> that correct, or an I remembering some other system?
>>
>> The V2E3 I started with used to squeal mightily when the amps were
>> enabled.
>>
>> >> I had to pull the rigid ram and head off the machine as an assembly,
>> >> to clear my doorway.  Does anybody have some hints on how to go about
>> >> reassembling that?  My plan is to remove the Z servo and the spindle
>> >> motor, then take the head off the ram, install the ram back on the
>> >> base and then hoist the head back up on the ram.  An issue with this
>> >> is that I have very limited ceiling height of about 92", so getting my
>> >> engine crane to lift it from above may be very difficult.  One
>> >> possible plan is to lift the head onto the table with some kind of
>> >> cribbing and then use the knee screw to lift the hear into position.
>> >>
>> >> I am real familiar with the 1J head on my old mill, but don't really
>> >> know how to get the 2J BOSS-style motor off the head and varispeed.
>> >> Any suggestions on that are welcome.
>>
>> I think I have a (nearly?) complete set of books if that would help?
>> I'll dig around tomorrow!
>>
>> Thanks,
>> Matt
>>
>>
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>>
> John Figie

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Re: [Emc-users] R2E3 retrofit

[John Figie]

Here are some pages about removing the motor and head for Series II
interact 2

https://drive.google.com/drive/folders/0B2fj8HWg0FnNX1hjbGJpbTF0bDg?resourcekey=0-taJjv8naI-blsIgoBgwWEg


John Figie

On Sun, Jun 26, 2022, 1:11 AM  wrote:

> On 2022-06-25 18:30, Jon Elson wrote:
> > On 6/25/22 15:56, Jon Elson wrote:
> >> Hello, all,
> >>
> >> I just got an R2E3 Bridgeport mill in my basement, and will be doing a
> >> LinuxCNC retrofit.
> >>
> >> I seem to recall the NC400 servo amps create a maddening squeal, is
> >> that correct, or an I remembering some other system?
>
> The V2E3 I started with used to squeal mightily when the amps were
> enabled.
>
> >> I had to pull the rigid ram and head off the machine as an assembly,
> >> to clear my doorway.  Does anybody have some hints on how to go about
> >> reassembling that?  My plan is to remove the Z servo and the spindle
> >> motor, then take the head off the ram, install the ram back on the
> >> base and then hoist the head back up on the ram.  An issue with this
> >> is that I have very limited ceiling height of about 92", so getting my
> >> engine crane to lift it from above may be very difficult.  One
> >> possible plan is to lift the head onto the table with some kind of
> >> cribbing and then use the knee screw to lift the hear into position.
> >>
> >> I am real familiar with the 1J head on my old mill, but don't really
> >> know how to get the 2J BOSS-style motor off the head and varispeed.
> >> Any suggestions on that are welcome.
>
> I think I have a (nearly?) complete set of books if that would help?
> I'll dig around tomorrow!
>
> Thanks,
> Matt
>
>
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Re: [Emc-users] R2E3 retrofit

[matt]

On 2022-06-25 18:30, Jon Elson wrote:

On 6/25/22 15:56, Jon Elson wrote:

Hello, all,

I just got an R2E3 Bridgeport mill in my basement, and will be doing a 
LinuxCNC retrofit.


I seem to recall the NC400 servo amps create a maddening squeal, is 
that correct, or an I remembering some other system?


The V2E3 I started with used to squeal mightily when the amps were 
enabled.


I had to pull the rigid ram and head off the machine as an assembly, 
to clear my doorway.  Does anybody have some hints on how to go about 
reassembling that?  My plan is to remove the Z servo and the spindle 
motor, then take the head off the ram, install the ram back on the 
base and then hoist the head back up on the ram.  An issue with this 
is that I have very limited ceiling height of about 92", so getting my 
engine crane to lift it from above may be very difficult.  One 
possible plan is to lift the head onto the table with some kind of 
cribbing and then use the knee screw to lift the hear into position.


I am real familiar with the 1J head on my old mill, but don't really 
know how to get the 2J BOSS-style motor off the head and varispeed.  
Any suggestions on that are welcome.


I think I have a (nearly?) complete set of books if that would help? 
I'll dig around tomorrow!


Thanks,
Matt


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Re: [Emc-users] R2E3 retrofit

[John Figie]

Jon,

I am not real familiar with the R2E3 but I have a Series II interact 2
with a fixed head. I have the Bridgeport manual that tells how to
remove the head and motor. Before I moved to my new location I needed
to remove the head from the machine to get it in and out of the
garage.  From pictures I think the mechanical parts of the head R3E3
might be the same once the additional extra cowling is removed?

https://photos.app.goo.gl/cR5uNisnwJ8TwrZS8

John Figie

On Sat, Jun 25, 2022 at 6:34 PM Jon Elson  wrote:
>
> On 6/25/22 15:56, Jon Elson wrote:
> > Hello, all,
> >
> > I just got an R2E3 Bridgeport mill in my basement, and
> > will be doing a LinuxCNC retrofit.
> >
> > I seem to recall the NC400 servo amps create a maddening
> > squeal, is that correct, or an I remembering some other
> > system?
> >
> > I had to pull the rigid ram and head off the machine as an
> > assembly, to clear my doorway.  Does anybody have some
> > hints on how to go about reassembling that?  My plan is to
> > remove the Z servo and the spindle motor, then take the
> > head off the ram, install the ram back on the base and
> > then hoist the head back up on the ram.  An issue with
> > this is that I have very limited ceiling height of about
> > 92", so getting my engine crane to lift it from above may
> > be very difficult.  One possible plan is to lift the head
> > onto the table with some kind of cribbing and then use the
> > knee screw to lift the hear into position.
> >
> > I am real familiar with the 1J head on my old mill, but
> > don't really know how to get the 2J BOSS-style motor off
> > the head and varispeed.  Any suggestions on that are welcome.
> >
> > Thanks,
> >
> > Jon
> >
>
>
>
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Re: [Emc-users] R2E3 retrofit

[Jon Elson]

On 6/25/22 15:56, Jon Elson wrote:

Hello, all,

I just got an R2E3 Bridgeport mill in my basement, and 
will be doing a LinuxCNC retrofit.


I seem to recall the NC400 servo amps create a maddening 
squeal, is that correct, or an I remembering some other 
system?


I had to pull the rigid ram and head off the machine as an 
assembly, to clear my doorway.  Does anybody have some 
hints on how to go about reassembling that?  My plan is to 
remove the Z servo and the spindle motor, then take the 
head off the ram, install the ram back on the base and 
then hoist the head back up on the ram.  An issue with 
this is that I have very limited ceiling height of about 
92", so getting my engine crane to lift it from above may 
be very difficult.  One possible plan is to lift the head 
onto the table with some kind of cribbing and then use the 
knee screw to lift the hear into position.


I am real familiar with the 1J head on my old mill, but 
don't really know how to get the 2J BOSS-style motor off 
the head and varispeed.  Any suggestions on that are welcome.


Thanks,

Jon





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