On Wed, 17 Apr 2013 18:02:15 -0400, you wrote:
>I wrote my own script to handle the curved surface. I wrote a custom post
>processor for this as well, it works well enough for the button curve.
>
>I am using the Create Vector tool within vcarve.
>
>This is getting infilled with black enamel, and
How are molds for plastic reflectors machined? They have a large number of
sharp edged corner cubes.
Could be done with EDM, but how would the EDM electrode be machined? All those
small facets have to be polished for the reflector to reflect light.
Plastic reflectors have been made like this as
On 18 April 2013 08:48, Gregg Eshelman wrote:
> How are molds for plastic reflectors machined? They have a large number of
> sharp edged corner cubes.
Possibly forged with a pyramidal punch?
--
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto
Hmm. I wonder how many folks who own a cnc router would let somebody else
do something like this? My bro-in-law has a laser engraver, but to get a
paintable depth would take a lot longer than the 20 seconds per but its
taking me.
So the suggestion is that a v bit is not going to curl the edges t
On 4/18/2013 7:26 AM, andy pugh wrote:
> On 18 April 2013 08:48, Gregg Eshelman wrote:
>> How are molds for plastic reflectors machined? They have a large number of
>> sharp edged corner cubes.
> Possibly forged with a pyramidal punch?
>
Take a look at http://www.nissin-precision.com/english/Rrm.
Make sure that your spindle speed is as slow as you can go with it. I
found to get a neat clean cut with plastics, I have to turn the speed
way down. The feed can be fast. You want to get nice chips. If you go
too slow or the spindle speed is too high, the plastic tends to melt at
the edges ins
I'll try that. I am currently cutting .015" deep, probably around 32000
rpm and 15 ipm.
On Thu, Apr 18, 2013 at 7:36 AM, Marius Liebenberg
wrote:
> Make sure that your spindle speed is as slow as you can go with it. I
> found to get a neat clean cut with plastics, I have to turn the speed
> way
I did a quick search in my archive and there are a couple of relevant
pictures of the lens shape and a mold
there may be more when I get around to doing more scanning
http://www.collection.archivist.info/searchv13.php?searchstr=ps+lamp
Dave
On Thu, Apr 18, 2013 at 8:48 AM, Gregg Eshelman wrote:
That seems extremely slow. I can't see a mention of what the plastic you're
cutting is but for Corian or acrylic with a 60 degree v-bit I tend to run at
around 1800 mm/min, 3mm DOC, 16k to 20k on the spindle - I adjust that by
ear.
I would run faster - but my router caps out at 2000 mm/min.
At
Yes, but.. a .020" snaps if you look at it wrong.
On Thu, Apr 18, 2013 at 2:57 PM, Ben Potter wrote:
> That seems extremely slow. I can't see a mention of what the plastic you're
> cutting is but for Corian or acrylic with a 60 degree v-bit I tend to run
> at
> around 1800 mm/min, 3mm DOC, 16k
Oops, I missed that part. Your feed/speed make more sense now. I'd still be
tempted to use a v-bit for that part and a 'V-Carve/Engraving' toolpath.
While it's a bit on the small side, it *should* give nice clean corners too.
It depends if your script will handle the Z motion correctly for that
too
On Thu, 18 Apr 2013 07:29:46 -0400, you wrote:
>Hmm. I wonder how many folks who own a cnc router would let somebody else
>do something like this? My bro-in-law has a laser engraver, but to get a
>paintable depth would take a lot longer than the 20 seconds per but its
>taking me.
Must be a slow
Ye Steve is correct. I machine the soft plastic in these cases. The spindle
speed is 1000rpm or less with a single flute 1/8" bit.
http://homanndesigns.com/index.php?option=com_content&view=article&id=56:mp-03-cnc-pendant-kit&catid=34:cnc-projects&Itemid=55
http://homanndesigns.com/images/storie
For 1/16 and larger plastic cuts I really like the onsrud single flute
cutters, I am sold, even at $40 plus for larger ones.
On Thu, Apr 18, 2013 at 7:10 PM, Peter Homann wrote:
> Ye Steve is correct. I machine the soft plastic in these cases. The spindle
> speed is 1000rpm or less with a single
Am 18.04.2013 09:48, schrieb Gregg Eshelman:
> How are molds for plastic reflectors machined? They have a large number of
> sharp edged corner cubes.
>
> Could be done with EDM, but how would the EDM electrode be machined? All
> those small facets have to be polished for the reflector to reflect
The UDOO is a single board computer with a 1ghz quad core CPU plus an Arduino
DUE. Same CPU as the Raspberry Pi but with 4 cores.
Runs Linux and Android.
http://www.kickstarter.com/projects/435742530/udoo-android-linux-arduino-in-a-tiny-single-board
Note the much saner port arrangement than wha
On Fri, Apr 19, 2013 at 12:26 AM, Gregg Eshelman wrote:
> The UDOO is a single board computer with a 1ghz quad core CPU plus an
> Arduino DUE. Same CPU as the Raspberry Pi but with 4 cores.
>
> Runs Linux and Android.
>
>
> http://www.kickstarter.com/projects/435742530/udoo-android-linux-arduino-
2013/4/19 Przemek Klosowski
> On Fri, Apr 19, 2013 at 12:26 AM, Gregg Eshelman
> wrote:
>
> > The UDOO is a single board computer with a 1ghz quad core CPU plus an
> > Arduino DUE. Same CPU as the Raspberry Pi but with 4 cores.
> >
> > Runs Linux and Android.
> >
> >
> >
> http://www.kickstarter
--- On Thu, 4/18/13, Kent A. Reed wrote:
> From: Kent A. Reed
> > On 18 April 2013 08:48, Gregg Eshelman
> wrote:
> >> How are molds for plastic reflectors machined? They
> have a large number of sharp edged corner cubes.
> > Possibly forged with a pyramidal punch?
> >
> Take a look at http:/
On 04/19/2013 12:30 AM, Gregg Eshelman wrote:
> --- On Thu, 4/18/13, Kent A. Reed wrote:
>
>> From: Kent A. Reed
>
>>> On 18 April 2013 08:48, Gregg Eshelman
>> wrote:
How are molds for plastic reflectors machined? They
>> have a large number of sharp edged corner cubes.
>
>>> Possibly forg
On 04/18/2013 06:37 AM, Kent A. Reed wrote:
> On 4/18/2013 7:26 AM, andy pugh wrote:
>
> Take a look at http://www.nissin-precision.com/english/Rrm.htm
>
very impressive forms
but if it _is_ electroforming, then the plated form is even smaller
i wish nissin showed an unplated version to see what th
Trying to set up the tool changer...I am not seeing the value change for the
floated input in classicladder by using the watch function in classicladder
when typing in MDI tool change. is there something I am missing. Hal is
saying that it is requesting the tool change but I cannot see the valu
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