Yes, 6mm (1/4") MDF works well. It has a bit of restriction so you don't
lose all of your vacuum when you cut right through your parts.
What sort of vacuum pumps did you have in mind? You'll probably need a
minimum of 250 cubic metres per hour for decent hold down. In terms of
motor size,
A friend was complaining about the need for 6kW vacuum system on a large
table and this got me thinking
Another way is to divide the table up into squares, grid wise, and have a
.. separate.. vacuum motor for each section. The motor is mounted under the
table at the bottom of each 'box'.
You
1/4" MDF is too thin to skin off the dense layers. (It almost doesn't' even
have a porous core like thicker MDFs) And it doesn't offer much protection from
coding mistakes. I prefer 3/4" MDF and then mill off about 0.05" off of each
sided to open it up. Then you have enough thickness to skim
On Tue, Jun 8, 2021 at 10:49 PM Leonardo Marsaglia
wrote:
> I've been reading and apparently MDF with a skim cut is pretty good to
> distribute the vacuum all around it's surface given its porosity. I think
> I'm gonna try that option first to see how severe is the vacuum loss when
> the cuts are
For milling sheet material on a large table, an MDF spoil board on top of a
vacuum grid is usually the best option. But for small parts such as solid wood
items vacuum pods are usually a better choice. In a pod arrangement with the
part held directly is where the valves are useful.
Todd
Hi
I was wondering what experience people have had with the CUI encoders.
Mostly looking at the costs. The AMT13 series comes as a kit with all the
adapters, at $33
But it's supplied with no female connector. You might only realise this
when you open the box, after paying for shipping, duties
Some CNC lasers and plasma cutters use zoned smoke collection system that opens
different shutters depending on the gantry position. Might something similar
work for holding the workpiece?
Thaddeus Waldner
Newdale School
Elkton, SD 57026
From: Roland Jollivet
I tested a 1.5kW vacuum cleaner motor for this application a while back
and wasn't impressed. They don't generate enough vacuum in my opinion.
You really need vane pumps or side channel blowers. Vane pumps generate
a very strong vacuum but use a lot of power. Side channel blowers
generate more
There is a wide discrepancy between the levels of vacuum that different types
of vacuum pumps and blowers can generate. Some kinds are rotary screw pumps,
liquid ring pumps, rotary vane pumps, positive displacement blowers like a
roots blower, or regenerative blowers (which are more like a
I've used the AMT112Q-V without any issues compared to the problems with the US
Digital ones. And they fit better.
> -Original Message-
> From: andrew beck [mailto:andrewbeck0...@gmail.com]
> Sent: June-09-21 12:36 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re:
For what is lts worth you can get a 2500ppr encoder for 30usd from my servo
supplier.
Or a a 5000ppr.
Or you can go absolute. And get a 13 something ppr encoder. They are
about 70usd I think
I think it's 17bit. But would have to check
On Thu, Jun 10, 2021, 7:31 AM Sam Sokolik wrote:
>
in the datasheet the
accuracy 0.2 degrees
so, in my mind, it is no better than a 1800 count encoder if that.. I
have used them in the past - they work ok for things like spindle
feedback. In my experience - for servo positioning feedback - it is too
noisy..
remember to read the spec sheet for the accuracy of the encoder - I was
looking at some 15 bit encoders or some such and they didn't seem that
great...
On Wed, Jun 9, 2021 at 3:14 PM John Dammeyer wrote:
> I've used the AMT112Q-V without any issues compared to the problems with
> the US
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