On 05.10.19 15:20, John Dammeyer wrote:
> >
> > I�m using PWM with a direct signal and enable.My drive accepts 0-10V,
> > so I
> > created a little board that converts the PWN to a 0-10V analog signal and
> > isolates all the signals.
> >
> > N. Christopher Perry
>
> That's basically what
On Monday 07 October 2019 14:57:17 Stuart Stevenson wrote:
> https://m.youtube.com/watch?v=WRuh7zgnUa0
>
> This, but with a single point you must helical for the entire thread
> length.
>
> On Mon, Oct 7, 2019, 1:48 PM andy pugh wrote:
> > On Mon, 7 Oct 2019 at 09:17, Stuart Stevenson
wrote:
>
https://m.youtube.com/watch?v=WRuh7zgnUa0
This, but with a single point you must helical for the entire thread length.
On Mon, Oct 7, 2019, 1:48 PM andy pugh wrote:
> On Mon, 7 Oct 2019 at 09:17, Stuart Stevenson wrote:
>
> > John,
> > We are talking about threading with the boring bar. Use a
On Mon, 7 Oct 2019 at 09:17, Stuart Stevenson wrote:
> John,
> We are talking about threading with the boring bar. Use a boring bar in the
> mill with a threading insert. You can thread any diameter OD
Are you talking about this method?
https://youtu.be/i4fTythQj5s?t=60
--
atp
"A motorcycle
John,
We are talking about threading with the boring bar. Use a boring bar in the
mill with a threading insert. You can thread any diameter OD and any
diameter the boring will fit in.
For a round hole I would prefer a reamer or a boring bar in a boring head.
thanks
Stuart
On Sun, Oct 6, 2019 at
On Sun, 6 Oct 2019 at 15:43, John Dammeyer wrote:
That's assuming you have 0 backlash or your backlash compensation works
> perfectly as you move in and out of climb milling. I find I still get
> better holes with a boring head for slip fitting ball bearing races for
> example.
I don't know
One of the problems with the PMDX-126 BoB is that although it takes two
parallel port connections the second port only brings the inputs out to opto
isolated terminals on the edge of the BoB.
The outputs (or alternatively inputs) are not brought out. Instead they go to
a proprietary
> On Sunday 06 October 2019 16:07:16 Stuart Stevenson wrote:
>
> > You don't need a boring head. An end mill adapter/holder will work
> > just fine.
>
> > On Sun, Oct 6, 2019, 2:22 PM Gene Heskett
> wrote:
> I keep forgetting the circle can be drawn by a helical xy path, dropping
> z at the
On Sunday 06 October 2019 16:07:16 Stuart Stevenson wrote:
> You don't need a boring head. An end mill adapter/holder will work
> just fine.
I keep forgetting the circle can be drawn by a helical xy path, dropping
z at the right pitch. Great idea Stuart, just haven't tried it yet.
> On Sun,
You don't need a boring head. An end mill adapter/holder will work just
fine.
On Sun, Oct 6, 2019, 2:22 PM Gene Heskett wrote:
> On Sunday 06 October 2019 14:00:09 Stuart Stevenson wrote:
>
> > Gene,
> > I frequently use a boring bar with a threading insert to thread mill
> > threads. It is a
On Sunday 06 October 2019 14:00:09 Stuart Stevenson wrote:
> Gene,
> I frequently use a boring bar with a threading insert to thread mill
> threads. It is a one flute thread mill but it does a wonderful job and
> is not expensive. You can cut OD and ID threads.
> Works a treat.
> If your mill
On Sunday 06 October 2019 13:12:59 andy pugh wrote:
> On Sat, 5 Oct 2019 at 14:20, Gene Heskett wrote:
> > 0V-10V PWM?
> > Check, delivered to the spindle circuitry of a mesa-7i76D
>
> I think that the output of a 7i76 is actually a digital potentiometer,
> with no PWM stage involved. It's part
Gene,
I frequently use a boring bar with a threading insert to thread mill
threads. It is a one flute thread mill but it does a wonderful job and is
not expensive. You can cut OD and ID threads.
Works a treat.
If your mill doesn't have a spiral code then maybe your CAM package can
output the
> -Original Message-
> From: Andrew [mailto:pkm...@gmail.com]
> I wouldn't worry about the min voltage.
> IIRC every VFD has settings for voltage-rpm curve, so you can set 0rpm to
> 0.5V or 1V, for instance.
>
The Bergerda AC Servo when connected to a Pot varying the voltage can turn
нд, 6 жовт. 2019 о 19:56 John Dammeyer пише:
>
> Yes but does it discharge to 0V or the is there a semiconductor junction
> voltage drop involved. With an external pull-down resistor, over time the
> cap would discharge back through the series resistor and the pull down
> resistor. Now if the
On Sat, 5 Oct 2019 at 14:20, Gene Heskett wrote:
> 0V-10V PWM?
> Check, delivered to the spindle circuitry of a mesa-7i76D
I think that the output of a 7i76 is actually a digital potentiometer, with
no PWM stage involved. It's part of the smart-serial subsystem.
--
atp
"A motorcycle is a
On Sun, 6 Oct 2019 at 10:56, John Dammeyer wrote:
>
> Yes but does it discharge to 0V or the is there a semiconductor junction
> voltage drop involved.
I haven't checked. I never need zero rpm out of my VFD except when it is
off, and that's a separate set of on/off terminals.
The data-sheet
> -Original Message-
> From: andy pugh [mailto:bodge...@gmail.com]
> Sent: October-06-19 9:21 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Spindle Speed Control.
>
> On Sat, 5 Oct 2019 at 16:17, John Dammeyer
> wrote:
>
> > T
On Sat, 5 Oct 2019 at 16:17, John Dammeyer wrote:
> That part is perfect. Didn't know there were opto's like that out there
> that could have a VCC of 10V.
I mainly selected it for the output driver, which actively discharges the
cap through the resistor when off and charges when on.
--
atp
>
> I�m using PWM with a direct signal and enable.My drive accepts 0-10V, so I
> created a little board that converts the PWN to a 0-10V analog signal and
> isolates all the signals.
>
> N. Christopher Perry
That's basically what I've drawn out too but I found the op-amp couldn't pull
to
That part is perfect. Didn't know there were opto's like that out there that
could have a VCC of 10V.
Thanks
John
> -Original Message-
> From: andy pugh [mailto:bodge...@gmail.com]
> Sent: October-05-19 11:24 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc
>>
>>> If you are controlling the speed of your spindle with LinuxCNC instead of
>>> just ON/OFF/DIR, how are you doing this?
>>>
>>> Step/Dir?
>>>
>>> 0V-10V PWM?
I’m using PWM with a direct signal and enable.My drive accepts 0-10V, so I
created a little board that converts the PWN to a
On Saturday 05 October 2019 12:56:25 John Dammeyer wrote:
> If you are controlling the speed of your spindle with LinuxCNC instead
> of just ON/OFF/DIR, how are you doing this?
>
> Step/Dir?
>
> 0V-10V PWM?
Check, delivered to the spindle circuitry of a mesa-7i76D, thence to an
ebay vfd on my
On 10/05/2019 11:56 AM, John Dammeyer wrote:
If you are controlling the speed of your spindle with LinuxCNC instead of just
ON/OFF/DIR, how are you doing this?
Well, on my Bridgeport mill, I use a spare channel of my
analog DAC to deliver 0-10 V.
On my minimill, I have the DC motor run
On Sat, 5 Oct 2019 at 12:03, John Dammeyer wrote:
>
> How are you generating the 0-10V?
Here is one way:
https://photos.app.goo.gl/dR3dNvnnyuj31yQ37
In fact my mill might be using that. I would need to look :-)
It's something that you can "dead-bug" and have in the middle of a cable in
0-10v + dir (pwm) Mesa.
Smart serial
0-10v + dir (stepgen - f/v) cheap eBay Bob.
On Sat, Oct 5, 2019, 1:03 PM John Dammeyer wrote:
> > From: Sam Sokolik [mailto:samco...@gmail.com]
> > 0-10v + dir (pwm)
> > Smart serial
> > 0-10v + dir (stepgen - f/v)
>
> How are you generating the 0-10V?
>
> >
> From: Sam Sokolik [mailto:samco...@gmail.com]
> 0-10v + dir (pwm)
> Smart serial
> 0-10v + dir (stepgen - f/v)
How are you generating the 0-10V?
>
>
> On Sat, Oct 5, 2019, 11:59 AM John Dammeyer
> wrote:
>
> > If you are controlling the speed of your spindle with LinuxCNC instead of
> >
On Sat, 5 Oct 2019 at 10:59, John Dammeyer wrote:
> If you are controlling the speed of your spindle with LinuxCNC instead of
> just ON/OFF/DIR, how are you doing this?
My lathe uses RS485 and the hy_vfd hal component. My mill uses analogue
0-10V from a Mesa card.
The other way round would
0-10v + dir (pwm)
Smart serial
0-10v + dir (stepgen - f/v)
On Sat, Oct 5, 2019, 11:59 AM John Dammeyer wrote:
> If you are controlling the speed of your spindle with LinuxCNC instead of
> just ON/OFF/DIR, how are you doing this?
>
> Step/Dir?
>
> 0V-10V PWM?
>
> ModBus?
> If ModBus RS232 or
57026
From: John Dammeyer
Sent: Saturday, October 5, 2019 11:59 AM
To: Enhanced Machine Controller (EMC)
Subject: [Emc-users] Spindle Speed Control.
If you are controlling the speed of your spindle with LinuxCNC instead of just
ON/OFF/DIR, how are you doing
If you are controlling the speed of your spindle with LinuxCNC instead of just
ON/OFF/DIR, how are you doing this?
Step/Dir?
0V-10V PWM?
ModBus?
If ModBus RS232 or RS485?
Some other way?
Thanks
John
"ELS! Nothing else works as well for your Lathe"
Automation Artisans Inc.
www
-Original Message-
From: Kirk Wallace [mailto:kwall...@wallacecompany.com]
Sent: Wednesday, March 16, 2011 3:35 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Spindle speed control through G540 VFD output
On Wed, 2011-03-16 at 21:05 +, andy pugh wrote:
On 16
On Sun, 2011-03-27 at 13:40 -0700, Michael Jones wrote:
... snip
I went back and looked compared my wiring to the above text diagram from
Kirk and found I had things wired pin 7 and 9 reversed - fortunately I
didn't fry the G540 because of it.
Thanks Kirk for the clue!!!
Michael
I could
-Original Message-
From: Michael Jones [mailto:ma...@michaelandholly.com]
Sent: Wednesday, March 16, 2011 7:59 PM
To: 'Enhanced Machine Controller (EMC)'
Subject: Re: [Emc-users] Spindle speed control through G540 VFD output
-Original Message-
From: Kirk Wallace [mailto:kwall
Michael Jones wrote:
I am about to start an upgrade to my system and am wondering if anyone has
already done this and has some pointers, or better yet, a detailed how-to.
How about a G54 stepconf file:
http://wiki.linuxcnc.org/uploads/G540.stepconf
Copy the file into ~/emc2/configs, run
On Wed, 2011-03-16 at 12:29 -0700, Michael Jones wrote:
I am about to start an upgrade to my system and am wondering if anyone has
already done this and has some pointers, or better yet, a detailed how-to.
I have a mini mill that's using a G540 controller run by the current version
of EMC.
-Original Message-
From: Kirk Wallace [mailto:kwall...@wallacecompany.com]
Sent: Wednesday, March 16, 2011 1:23 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Spindle speed control through G540 VFD output
On Wed, 2011-03-16 at 12:29 -0700, Michael Jones wrote:
I am
On 16 March 2011 20:50, Michael Jones ma...@michaelandholly.com wrote:
And yes, the pot is isolated as you've said.
Does this mean that this upgrade is a not recommended or possibly
hazardous direction, or just that there's more I need to do besides just
hooking up the VFD output pins from
On Wed, 2011-03-16 at 21:05 +, andy pugh wrote:
On 16 March 2011 20:50, Michael Jones ma...@michaelandholly.com wrote:
And yes, the pot is isolated as you've said.
Does this mean that this upgrade is a not recommended or possibly
hazardous direction, or just that there's more I need
On 16 March 2011 22:35, Kirk Wallace kwall...@wallacecompany.com wrote:
The PWM frequency will be determined by the thread rate that the PWM
component is loaded in
No, thats's just not right. The PWM frequency is set by the frequency
parameter, which I forgot to include in that HAL snippet.
On Wed, 2011-03-16 at 15:35 -0700, Kirk Wallace wrote:
... snip
The PWM frequency will be determined by the thread rate that the PWM
component is loaded in - usually the servo thread or 1kHz (?). The G540
doc hints at 50Hz, but I think it will work anyway. This is off the top
of my head, so
On Wednesday, March 16, 2011 10:19:43 PM Kirk Wallace did opine:
On Wed, 2011-03-16 at 12:29 -0700, Michael Jones wrote:
I am about to start an upgrade to my system and am wondering if anyone
has already done this and has some pointers, or better yet, a
detailed how-to.
I have a mini
-Original Message-
From: Kirk Wallace [mailto:kwall...@wallacecompany.com]
Sent: Wednesday, March 16, 2011 3:35 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Spindle speed control through G540 VFD output
On Wed, 2011-03-16 at 21:05 +, andy pugh wrote:
On 16
gene heskett wrote:
On Wednesday, March 16, 2011 10:19:43 PM Kirk Wallace did opine:
In either event, as you say above, the control from the computer needs to
be isolated, the KBIC and look-a-likes all seem to have line voltages on
the control circuitry. I use a pwm signal for speed
The Hurco KM3P has a setup somewhat like Igor's.
In the KM3P (P denotes programmable spindle speed) there is a small 3ph motor
with a worm gear which drives the shaft where the crank handle would be on your
average BP type mill.
There is a Voltac card which reads a single prox switch which
On Mon, Aug 9, 2010 at 7:40 PM, Greg Bentzinger skullwo...@yahoo.com wrote:
The Hurco KM3P has a setup somewhat like Igor's.
In the KM3P (P denotes programmable spindle speed) there is a small 3ph motor
with a worm gear which drives the shaft where the crank handle would be on
your average
On 8 August 2010 04:35, Igor Chudov ichu...@gmail.com wrote:
Say, I say S3000 and drill. Then I change tool to a tap and say S300
and rigid tap. To accomplish that, EMC would actuate SPEED DECREASE
solenoid and wait until the output speed, as reported by the encoder,
approximately equals the
On Sun, Aug 8, 2010 at 5:33 AM, Andy Pugh a...@andypugh.fsnet.co.uk wrote:
On 8 August 2010 04:35, Igor Chudov ichu...@gmail.com wrote:
Say, I say S3000 and drill. Then I change tool to a tap and say S300
and rigid tap. To accomplish that, EMC would actuate SPEED DECREASE
solenoid and wait
Igor Chudov wrote:
Andy, my feeling on the matter, is that your solution is great. I
should somehow activate these comparators for a short time after a
speed change command (like for 7 seconds) and then disable them
afterwards. That way reversing with a VFD, is not a problem.
There is a
Jon Elson wrote:
Igor Chudov wrote:
Andy, my feeling on the matter, is that your solution is great. I
should somehow activate these comparators for a short time after a
speed change command (like for 7 seconds) and then disable them
afterwards. That way reversing with a VFD, is not a
On Sun, Aug 8, 2010 at 1:08 PM, Jon Elson el...@pico-systems.com wrote:
Igor Chudov wrote:
Andy, my feeling on the matter, is that your solution is great. I
should somehow activate these comparators for a short time after a
speed change command (like for 7 seconds) and then disable them
On 8 August 2010 19:08, Jon Elson el...@pico-systems.com wrote:
There is a spindle-at-speed function that could be used to decide when
the speed control logic has finished.
I believe that is an input, used to feed-hold until the drive
indicates that the spindle is at the correct speed.
--
Guys, I am just thinking, perhaps what I am trying to accomplish
(speed change via varidrive), could be best accomplished via an M100
command (shell script). Shell or perl scripts have access to hal,
right? I would write something like (in pseudocode)
$desired_speed = ARGV[0]
$delta = max( 5,
I forgot to cancel SPEED INCREASE/DECREASE at the and of the pseudocode. Sorry!
On Sun, Aug 8, 2010 at 1:51 PM, Igor Chudov ichu...@gmail.com wrote:
Guys, I am just thinking, perhaps what I am trying to accomplish
(speed change via varidrive), could be best accomplished via an M100
command
Igor Chudov wrote:
Jon, what is FF?
Anyway, I will start with easy buttons, such as BRAKE AUTO/OFF.
But I want to do everything right when it comes to other things, such
as spindle speed control, etc.
Sorry, flip-flop. a mechanism that sets to one logic value on a
particular trigger,
Jon, yes, good point on brake. I also want to let the vfd to stop the
spindle, and will use the brake for speed changes.
On Aug 8, 2010 3:10 PM, Jon Elson el...@pico-systems.com wrote:
Igor Chudov wrote:
Jon, what is FF?
Anyway, I will start with easy buttons, such as BRAKE AUTO...
Sorry,
I have a Bridgeport Interact mill with a three phase spindle motor on a VFD.
In addition, the mill has a vari-drive system with SPEED INCREASE and
SPEED DECREASE selector.
This selector activates pneumatic solenoids that drive an air motor.
The motor actually increases and decreases speed of the
Hi
I am trying to use the 4th axis on the m5i20 board as the +/-10VDC control
for a frequency drive
I have added these lines to my io file:
#Spindle speed from DAC 03 scale 500
newsig spinspeed float
linksp spinspeed = motion.spindle-speed-out
linksp spinspeed = m5i20.dac-03-value
Hi
I am retrofitting a HES turning center with EMC2, using mesa 5i20 +7i33
+7i37
I have taken some lines from pluto hal file to get thread cutting and
connected the spindle encoder to enc-03, both threading and rigid tapping
are working.
But have been unable to get the spindle speed display to
Dave Dyke wrote:
Hi
I am retrofitting a HES turning center with EMC2, using mesa 5i20 +7i33
+7i37
I have taken some lines from pluto hal file to get thread cutting and
connected the spindle encoder to enc-03, both threading and rigid tapping
are working.
But have been unable to get the spindle
Hi Lester,
The DigiSpeed-GX board contains an isolated 5V to 15V dc/dc converter. It
accepts a PWM signal and converts it to an isolated DC control voltage
suitable for Asian DC motor controllers, and VFDs.
http://homanndesigns.com/store/index.php?main_page=product_infocPath=1products_id=21
Peter Homann wrote:
Hi Lester,
The DigiSpeed-GX board contains an isolated 5V to 15V dc/dc converter. It
accepts a PWM signal and converts it to an isolated DC control voltage
suitable for Asian DC motor controllers, and VFDs.
Lester,
I first tried to get the required 12V from the kbic, but as this is only
provided for with a zener (according to the schematics), it dropped to
6V as soon as the C11 board was connected. So bad option.
As in the meantime the 5V-12V dc converter arrived (indeed from
Farnell), I used that
Just had word from Arturo, maker of the C11 board that the fequency for
full voltage is set to be 25KHz. Will need to investigate why I get nice
results with 400Hz...
Kirk Wallace wrote:
On Wed, 2007-12-26 at 23:18 +0100, Geert De Pecker wrote:
Same here, but then again, the 400 Hz is the
Kirk Wallace wrote:
On Wed, 2007-12-26 at 21:07 +, Lester Caine wrote:
Kirk Wallace wrote:
On Wed, 2007-12-26 at 17:22 +, Lester Caine wrote:
Geert De Pecker wrote:
I probably wrongly assumed that the voltage should come from the KBIC
... snip
How much adjustment will the
On Tue, 25 Dec 2007 23:19:49 -0600
Jon Elson [EMAIL PROTECTED] wrote:
Dave Engvall wrote:
If anyone wants to etch a disc I can probably find an 30 mL or so
of KPR.
KPR is abominable to work with. I have DuPont Riston dry film
photoresist. I have laminated it onto .005 and .003 brass
I'm thinking of a 100 line encoder. Wouldn't require too much resolution.
Tested from the rhino cad program and output seems very acceptable.
But I assume for more then 200 line, it could be worse.
Geert
ben lipkowitz wrote:
On Mon, 24 Dec 2007, Geert De Pecker wrote:
To do threading on the
On Wed, 2007-12-26 at 11:04 +0100, Geert De Pecker wrote:
I probably wrongly assumed that the voltage should come from the KBIC
board. As you say, this would indeed be a flexible solution. Will look
out from such a converter. My controller case is almost full, have to
find some room to put
Hi Jon,
Riston sounds like better stuff and easier to use. I think one gets
sharper etching if the etchant is pumped over the foil.
I guess I'm pretty casual about solvents having worked with benzene
above the permissible limit for several weeks each year. Anytime you
can smell benzene you
On Wed, 2007-12-26 at 17:22 +, Lester Caine wrote:
Geert De Pecker wrote:
I probably wrongly assumed that the voltage should come from the KBIC
board. As you say, this would indeed be a flexible solution. Will look
out from such a converter. My controller case is almost full, have to
Kirk,
The C11 document specifies three power supplies. One computer side +5V,
one CNC side +5V @ 2A and One CNC side +12V @ 300mA. I would think if
you have satisfied these specifications, you should be okay. 12V should
have enough headroom to regulate to 10 V and the VFD should only draw a
On Wed, 2007-12-26 at 20:21 +0100, Geert De Pecker wrote:
Kirk,
The C11 document specifies three power supplies. One computer side +5V,
one CNC side +5V @ 2A and One CNC side +12V @ 300mA. I would think if
you have satisfied these specifications, you should be okay. 12V should
have
Kirk Wallace wrote:
On Wed, 2007-12-26 at 17:22 +, Lester Caine wrote:
Geert De Pecker wrote:
I probably wrongly assumed that the voltage should come from the KBIC
board. As you say, this would indeed be a flexible solution. Will look
out from such a converter. My controller case is
On Wed, 2007-12-26 at 21:07 +, Lester Caine wrote:
Kirk Wallace wrote:
On Wed, 2007-12-26 at 17:22 +, Lester Caine wrote:
Geert De Pecker wrote:
I probably wrongly assumed that the voltage should come from the KBIC
... snip
How much adjustment will the potentiometer give? Thanks.
On Wed, 2007-12-26 at 12:28 -0800, Kirk Wallace wrote:
On Wed, 2007-12-26 at 20:21 +0100, Geert De Pecker wrote:
Kirk,
The C11 document specifies three power supplies. One computer side +5V,
... snip
if I had enough money, I'd be rich.
At 400Hz I get the max voltage out of
Same here, but then again, the 400 Hz is the maximum needed to get the
full analog voltage. So no problem here.
The C11 board really needs a frequency, the pulse width is of very
little influence on the voltage.
Geert
I checked the siggen setup on my test system and 480Hz was the highest
Lester,
This is indeed a solution. Thanks for the link.
Lester Caine wrote:
http://cnc4pc.com/Tech_Docs/C11G__SIEG_X3_Electrical%20storybook.pdf
Check out page 7.
The thing to remember here is that the motor control pot on the Asian mills
is
at mains potential, so you need a totally
On Wednesday 26 December 2007, Dave Engvall wrote:
Hi Jon,
Riston sounds like better stuff and easier to use. I think one gets
sharper etching if the etchant is pumped over the foil.
Many years ago, we had a DEA spray etcher at the tv station where I got
started back in the early 60's. You
Gene Heskett wrote:
On Wednesday 26 December 2007, Dave Engvall wrote:
Hi Jon,
Riston sounds like better stuff and easier to use. I think one gets
sharper etching if the etchant is pumped over the foil.
Many years ago, we had a DEA spray etcher at the tv station where I got
started back
On Tuesday 25 December 2007, ben lipkowitz wrote:
On Mon, 24 Dec 2007, Geert De Pecker wrote:
To do threading on the lathe is the end goal. I'm still in the
development phase for the encoder bit. Want to make it myself
(see part of drawing at http://users.skynet.be/gedp/FILES/index.html).
A while back, I tried printing an encoder with my CAD program. I didn't
get very good results. My laser printer's resolution, which is great for
printing documents, was lousy for encoders. What resolution and how
small a disk is possible with your method? Although, I suppose for a
spindle, a
I would feel confident printing 256 lines on a 2 inch diameter encoder,
with my 600 dpi HP laserjet 1018, but I haven't tried it out with a sensor
yet. At 512 lines, the spacing between lines starts to look uneven.
A 7 inch disc with 1024 lines looks pretty good.
Kinko's has 1200 dpi laser
Good try. KPR is a photoresist made by Kodak. It is good enough to do
wafers.
It needs reasonably energetic UV to polymerize and then toluene to
dissolve off the non-polymerized part for etching.
D
On Dec 25, 2007, at 4:15 PM, Kirk Wallace wrote:
KPR?
Kentucky Paranormal Research
Dave Engvall wrote:
If anyone wants to etch a disc I can probably find an 30 mL or so of
KPR.
KPR is abominable to work with. I have DuPont Riston dry film
photoresist. I have laminated it onto .005 and .003 brass
shim stock with my dry film laminator machine. It has heated
Kirk Wallace wrote:
KPR?
Kentucky Paranormal Research
Kawartha Pine Ridge District Public School Board
Kodak Photo Resist, a Xylene-based organic photo resist that is
hardened by exposure to UV light. It is very old school and
not only requires nasty chemicals, but is quite fragile. The
Hi all,
I installed a CNC4PC breakout board that has an analog voltage output
available for spindle speed control. However, this board works based
on a frequency to voltage converter and not like standard emc duty cycle
generated by pwmgen.
I was looking into using siggen to create a speed
On Mon, 2007-12-24 at 14:11 +0100, Geert De Pecker wrote:
Hi all,
I installed a CNC4PC breakout board that has an analog voltage output
available for spindle speed control. However, this board works based
on a frequency to voltage converter and not like standard emc duty cycle
generated by
It is the C11 multifunction board. Main reasons where the isolated
analog voltage and the relay to enable me to stop the motor when the job
is finished.
Kirk Wallace wrote:
Which CNC4PC board do you have?
On Mon, 2007-12-24 at 18:51 +0100, Geert De Pecker wrote:
Kirk,
Problem is that I
On Mon, 2007-12-24 at 19:01 +0100, Geert De Pecker wrote:
It is the C11 multifunction board. Main reasons where the isolated
analog voltage and the relay to enable me to stop the motor when the job
is finished.
From a brief look at the documentation, it looks like you need one of
the
Kirk,
Thanks for the info. I'll check it out.
I don't think we need 24kHz. The default pwm signal is 100Hz and gave me
2.5 volts. I changed the frequence in the hal config to 200 Hz and the
output was approx 5V, so I guess the max voltage on the C11 board is
reached at 400Hz.
Never experimetd
Kirk,
To do threading on the lathe is the end goal. I'm still in the
development phase for the encoder bit. Want to make it myself
(see part of drawing at http://users.skynet.be/gedp/FILES/index.html).
Still some time away though.
Yes the C11 is full throttle.
If you're interested in the files,
Kirk,
You pointed me in the right direction. With siggen and scale, I was able
to produce a frequency from the spindle control. I posted the mill.ini and
mill.hal on http://users.skynet.be/gedp/FILES/index.html.
The signal isn't very stable because I had to put it in the servo-thread
(probably
Geert De Pecker wrote:
Next problem: the analog voltage on the C11 board doesn't go to the max
input voltage. I measured the voltage across the sherline potentiometer
and it is 9.2 volts. With the bench supply set to 9.2 and attached to
the analog voltage of the board, the max output is 8.2
On Mon, 24 Dec 2007, Geert De Pecker wrote:
To do threading on the lathe is the end goal. I'm still in the
development phase for the encoder bit. Want to make it myself
(see part of drawing at http://users.skynet.be/gedp/FILES/index.html).
Geert,
There are some .ps files floating around
On Mon, Sep 10, 2007 at 10:28:37PM +, Neil Buck wrote:
I'm half way through retrofitting a Cincinnati VMC with a MESA m5i20 setup. I
would welcome some advice as to the best way to control the spindle. My goal
is
to be able to do rigid tapping and fully automatic tool changes. My thoughts
On Mon, 10 Sep 2007, Neil Buck wrote:
Date: Mon, 10 Sep 2007 22:28:37 + (UTC)
From: Neil Buck [EMAIL PROTECTED]
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: emc-users@lists.sourceforge.net
Subject: [Emc-users] Spindle Speed Control with MESA m5i20
Dont know if the driver has been updated to work with it, but thre has been a
8 axis 5I20 HOSTMOT configuration around for some time. (If you dont need
more than 1 connectors worth of I/O)
Peter Wallace
the driver has not been updated for 4 vs. 8-axis HOSTMOT.
Likewise it would be nice for
Chris,
Thanks for the info. I'll give the filtered PWM option a try. I'm in the process
of hooking up the spindle encoder at the moment so will soon see what resolution
it's got. I can see from the wiring diagram that it's A B quad and index but
I've no idea what resolution. The axis motors all
On Mon, 2007-09-10 at 22:28 +, Neil Buck wrote:
I'm half way through retrofitting a Cincinnati VMC with a MESA m5i20 setup. I
would welcome some advice as to the best way to control the spindle. My goal
is
to be able to do rigid tapping and fully automatic tool changes. My thoughts
are
SNIP
I have limited knowledge and experience with electronics, but here is
some of my recent experience with my spindle VFD.
Just for testing, I used a parallel port out put with an RC filter and
found that to smooth the signal, the capacitor had to be quite large
which also slowed the
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