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
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