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
On 18 April 2013 08:48, Gregg Eshelman g_ala...@yahoo.com 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
On 4/18/2013 7:26 AM, andy pugh wrote:
On 18 April 2013 08:48, Gregg Eshelman g_ala...@yahoo.com 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
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
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
mar...@mastercut.co.zawrote:
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
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
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 b...@bpuk.org 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
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
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_contentview=articleid=56:mp-03-cnc-pendant-kitcatid=34:cnc-projectsItemid=55
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 gro...@homanndesigns.comwrote:
Ye Steve is correct. I machine the soft plastic in these cases. The spindle
speed is
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
On Fri, Apr 19, 2013 at 12:26 AM, Gregg Eshelman g_ala...@yahoo.com 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.
2013/4/19 Przemek Klosowski przemek.klosow...@gmail.com
On Fri, Apr 19, 2013 at 12:26 AM, Gregg Eshelman g_ala...@yahoo.com
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.
--- On Thu, 4/18/13, Kent A. Reed kentallanr...@gmail.com wrote:
From: Kent A. Reed kentallanr...@gmail.com
On 18 April 2013 08:48, Gregg Eshelman g_ala...@yahoo.com
wrote:
How are molds for plastic reflectors machined? They
have a large number of sharp edged corner cubes.
Possibly
On 04/19/2013 12:30 AM, Gregg Eshelman wrote:
--- On Thu, 4/18/13, Kent A. Reed kentallanr...@gmail.com wrote:
From: Kent A. Reed kentallanr...@gmail.com
On 18 April 2013 08:48, Gregg Eshelman g_ala...@yahoo.com
wrote:
How are molds for plastic reflectors machined? They
have a large number
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 the
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