Don't know if this guy is still around but he had a method of resharpening
carbide end mills where they could cut really hard materials, like metal files.
https://www.youtube.com/channel/UCN6hhXdNcy00iIp6Hfwo29A
On Saturday, July 25, 2020, 1:46:25 AM MDT, andrew beck
wrote:
You can buy
Corner turning with a drag knife can be done by raising the knife until the
point is just into the material. Then sweep an arc with a radius equal to the
knife point offset. For inside corners that's the way to do it. On outside
corners that method works or you can have it go past the end then
Here is cutting machines in action https://www.youtube.com/watch?v=C-67lKePbcQ
somewhere from one third to half way thru, also other places using a knife as
someone suggested, this one need a spindle encoder. Guess this is the
technology for small series, either do myself buying tool to my
I do not understand all of your email, but let me try to respond. You
describe a die-cutting method called kiss-cutting in which the cut does not
go through all the layers of a label, for instance. These are usually done
on presses, such as a clam-shell press, and using steel-rule dies. For a
Otherwise I better of find someone locally, have seen some plotters I think do
something similar, it is common stickers are cut half way thru and thought
maybe someone know what kind of tool is used to this kind of things so I could
the machine on floor 2-3 meters behind me? If you are close
Notice the tip of the blade is not on the centerline of the tool holder and
the offset moves to trail the direction of movement. As I said, you will
have to think about how to make corners
On Fri, Jul 24, 2020 at 6:05 PM andy pugh wrote:
> On Sat, 25 Jul 2020 at 01:48, Matthew Herd wrote:
> >
take a look at steel rule dies
they are cheap ( relative term )
and not difficult to make ( again relative)
you can get it made custom using online services.
The ejector is a rubber-like pad surrounding the rule
tomp
On 7/25/20 6:09 PM, andy pugh wrote:
On Sat, 25 Jul 2020 at 12:05, N
If you do not want to invest in tooling or machines or learning something
new, there is a prototype die-cutting service that can score plastic sheets
so that you can follow-up with scissors. Full -disclosure it is my company
(see below). We have done this for clothing designers by scoring
> Depending on the plastic I'd first look at laser for this application.
> Don't laser PVC. PE and PP can be difficult unless it is very thin.
>
> Drag or tangential knife would be my second choice. You'll need some way
> to hold the sheet down. Simply taping down the edges may work. For
>
On 25 Jul 2020, at 08:43, andrew beck wrote:
> single flute
> router cutters for like 3usd.Just trying to help fellow
> linuxcnc guys
Thanks. That's really useful to know. At around 80USD for a 12mm cutter
locally, this is a source I will try, especially when you are saying you have
Depending on the plastic I'd first look at laser for this application.
Don't laser PVC. PE and PP can be difficult unless it is very thin.
Drag or tangential knife would be my second choice. You'll need some way
to hold the sheet down. Simply taping down the edges may work. For
thinner more
> On Sat, 25 Jul 2020 at 12:05, N wrote:
>
> > Square outline with four or six square holes is the most important but it
> > might be I want to cover another surface with slighlty more complicated
> > form and mor holes. Need only four of them right now for prototypes and
> > maybe 30-40
While I wouldn't want to discourage anyone from getting a CNC router or
laser, as a little exercise in outside the box thinking, 3D printing
these insulator sheets would be a fairly trivial exercise. I sometimes
print first layer calibration test squares on a flat glass bed. Dial in
the bed
On Sat, 25 Jul 2020 at 12:05, N wrote:
> Square outline with four or six square holes is the most important but it
> might be I want to cover another surface with slighlty more complicated form
> and mor holes. Need only four of them right now for prototypes and maybe
> 30-40 later on.
Laser
> On Sat, 25 Jul 2020 at 09:10, N wrote:
>
> > Need to cut plastic films for electrical isolation.
>
> What sort of shapes? How many pieces a day and in total?
Square outline with four or six square holes is the most important but it might
be I want to cover another surface with slighlty more
On Sat, 25 Jul 2020 at 09:10, N wrote:
> Need to cut plastic films for electrical isolation.
What sort of shapes? How many pieces a day and in total?
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
> On Sat, 25 Jul 2020 at 01:48, Matthew Herd wrote:
> >
> > I did some reading. Here’s a much cheaper one.
> > https://www.amazon.com/Carbide-Housing-Silhouette-Machines-Portrait/dp/B07LBN6Y89
>
> Yes, that is also in pen-plotter format.
Have an engraver and a CNC machine, engraver spindle
You can buy your router bits from China if you want. I bring in probably
15k usd per year. My supplier sells ultra sharp endmills or single flute
router cutters for like 3usd. Often for routers and custom form tools they
are better than the branded stuff here that costs 30 nzd.
Anyway just
I bought a cheap drag knife some time ago, from a far off land, but I have not
yet used it, because:
(a) it does need routines for turning corners, and
(b) upon inspection, I decided that a critical factor is likely to be the
ability of the knife to swivel very freely; and this cheap one didn't.
On Sat, 25 Jul 2020 at 01:48, Matthew Herd wrote:
>
> I did some reading. Here’s a much cheaper one.
> https://www.amazon.com/Carbide-Housing-Silhouette-Machines-Portrait/dp/B07LBN6Y89
Yes, that is also in pen-plotter format.
--
atp
"A motorcycle is a bicycle with a pandemonium attachment
The think about a drag knife is that you have to use special path planning
for corners to make the knife swivel. These knives are mostly used in the
sign-making industry to cut colored vinyl. Either the vinyl makes the
letters of a stencil for paint.
Many of these knives are designed to
I did some reading. Here’s a much cheaper one.
On Sat, 25 Jul 2020 at 00:55, N wrote:
> > https://www.amazon.com/Dog-River-Tools-Knife-Cutter/dp/B085BF98Z9
> Yes that might be the correct tool.
That's a very expensive one. I bought a carbide one for a few quid,
for mounting in a flatbed plotter.
--
atp
"A motorcycle is a bicycle with a
> Perhaps a drag knife?
>
> https://www.amazon.com/Dog-River-Tools-Knife-Cutter/dp/B085BF98Z9/ref=asc_df_B085BF98Z9/?tag=bingshoppinga-20=df0===oe=cpla-4584001427192206=1
>
>
Perhaps a drag knife?
https://www.amazon.com/Dog-River-Tools-Knife-Cutter/dp/B085BF98Z9/ref=asc_df_B085BF98Z9/?tag=bingshoppinga-20=df0===oe=cpla-4584001427192206=1
> On 25 Jul 2020, at 00:20, N wrote:
>
> Thin thickness OH film or maybe a little bit thicker.
Maybe drag-knife if you can hold it down. Otherwise laser cutter.
Or, die cutting, depending on quantities.
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Anybody here know about a suitable tool or similar to cut plastic sheets?
Thin thickness OH film or maybe a little bit thicker.
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