Probably more OT, but is this a very special mould? Or process?
I've seen many plastic moulds running, and I think the general principle
is; while there is hot and cold water available, once running, only the
chillers are required. There is a net heat being generated from the hot
plastic, so only
On 2/8/2017 8:15 PM, Jon Elson wrote:
> On 02/08/2017 11:34 AM, dan...@austin.rr.com wrote:
>> I don't have a physical stop on my Z axis, putting one in would be a PITA.
>> The drive is exceptionally strong and it would be problematic to stop the
>> axis that way. If you're an idiot and jog i
On Wednesday 08 February 2017 21:22:12 Leonardo Marsaglia wrote:
> Thanks to all four your answers!
>
> I'll try to answer to all of you in one response just to make it more
> readable.
>
> *Andy*: I was reading about PW reactors when I started to plan this
> kind of system but I really couldn't f
2017-02-08 23:25 GMT-03:00 Kurt Jacobson :
> I did some research on organic coolants for nuclear reactors a while back.
> The idea was to replace the typical high pressure high temperature
> pressurized water reactor coolant loop with a high boiling point organic
> oil loop operating at low pressu
2017-02-08 23:24 GMT-03:00 Jon Elson :
> Well, not if he has steam at 1000 PSI! Compared to a little
> air, steam is VERY dangerous.
> In general, what he is describing could be considered a bomb
> by Homeland Security.
> The local police and fire department would take a real dim
> view of such a
You don't want to use steam at 1000 psi unless you absolutely have to.
I've gotten in the way of steam at high pressure and that is something
that you will never forget. At 1000 psi that is an injection hazard.
High pressure steam leaks can be invisible, and sometime inaudible, so
you might nev
2017-02-08 22:07 GMT-03:00 Gregg Eshelman :
> Injection molding thermoplastic, thermoset plastic or RTV silicone?
> Each requires a different approach to mold heating and cooling.
> Thermoplastics get shot into hot molds. Then the mold is cooled just
> enough so that the parts won't distort when t
On 02/08/2017 11:49 AM, Chris Albertson wrote:
> The only thing I know about this is that you absolutely need to keep air
> out of the system. It all needs to be designed so that trapping air in the
> plumbing is impossible. When/if the plumbing bursts having compressed air
> inside makes it a l
I did some research on organic coolants for nuclear reactors a while back.
The idea was to replace the typical high pressure high temperature
pressurized water reactor coolant loop with a high boiling point organic
oil loop operating at low pressure (below atmospheric to reduce the chance
of contam
Thanks to all four your answers!
I'll try to answer to all of you in one response just to make it more
readable.
*Andy*: I was reading about PW reactors when I started to plan this kind of
system but I really couldn't find too much information about it other than
general aspects. I was trying to
On 02/08/2017 11:34 AM, dan...@austin.rr.com wrote:
> I don't have a physical stop on my Z axis, putting one in would be a PITA.
> The drive is exceptionally strong and it would be problematic to stop the
> axis that way. If you're an idiot and jog it that way prior to homing, you
> can dismou
A liquid system has a safety advantage over a system filled with a gas, or a
liquid that will easily flash to vapor if there's a leak.
A hot liquid that stays liquid when pressure is let off will only spurt through
a leak for a short time as the pressure drops. It may spray into a mist but it
wo
Injection molding thermoplastic, thermoset plastic or RTV silicone?
Each requires a different approach to mold heating and cooling.
Thermoplastics get shot into hot molds. Then the mold is cooled just enough so
that the parts won't distort when they're ejected.
Thermoset plastics need different mo
On 8 February 2017 at 17:34, wrote:
> There is a homing switch at Z+. It sounds desirable to halt + movement when
> that switch is tripped, AND not homed, AND not in the actual homing sequence.
> But NOT stop - movement, otherwise you'd jog it upwards, get it stuck, and
> no way to jog down.
On Wednesday 08 February 2017 11:58:59 Jon Elson wrote:
> Can anybody recommend step motor drivers for a Bridgeport
> Series-II mill?
> I know there are some awful Chinese units out there, I'd
> like to avoid recommending anything that would not be reliable.
>
> Anybody know the specs of the stepp
On 2/8/2017 2:31 PM, andy pugh wrote:
> On 8 February 2017 at 19:45, Jim Craig wrote:
>> Dowtherm is used in thermal solar power plants.
> That sounds a lot less trouble than my molten salt idea. Those are
> super-stable at high temp (and relatively inexpensive) but if allowed
> to freeze would be
On 8 February 2017 at 19:45, Jim Craig wrote:
> Dowtherm is used in thermal solar power plants.
That sounds a lot less trouble than my molten salt idea. Those are
super-stable at high temp (and relatively inexpensive) but if allowed
to freeze would be very troublesome.
--
atp
"A motorcycle is a
On 8 February 2017 at 18:20, TJoseph Powderly wrote:
> andyp was looking at an udoo, from messages back in 2014,
> so i suspect it was an arm system,
Mine is. I might try setting it up again, just as a test system.
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed
Syltherm or Dowtherm are just such oils that are used in heat transfer
applications. Dowtherm is used in thermal solar power plants. There are
others out there but I cannot remember them off the top of my head right
now.
If the right one is selected they would be much more stable at 280°C
Jim
Compressed air is the least of the worry's when dealing with 1000psi
steam. If something does give up the ghost it will not be leaking air or
water it will be superheated steam.
The biggest issue I see with they system is that there will be a very
high probability of thermal stresses and fatigu
What about using some sort of oil, or some other liquid that would not have the
high vapor pressures of water?
- Original Message -
From: "Chris Albertson"
To: "Enhanced Machine Controller (EMC)"
Sent: Wednesday, February 8, 2017 12:49:16 PM
Subject: Re: [Emc-users] OT: Need some guida
there are some x86 models,
and one, the udoo x86 ultra, has an embedded arduino 101 (maybe a handy
slave)
there are also arm models
but this x86 looks interesting forlinuxcnc
the "udoo x86 ultra" tadaaa
it came out of kickstarter
http://mouser.com/new/udoo/udoo-x86/
https://www.slant.co/topi
On 02/08/2017 11:34 AM, dan...@austin.rr.com wrote:
> I don't have a physical stop on my Z axis, putting one in would be a PITA.
> The drive is exceptionally strong and it would be problematic to stop the
> axis that way. If you're an idiot and jog it that way prior to homing, you
> can dismou
The only thing I know about this is that you absolutely need to keep air
out of the system. It all needs to be designed so that trapping air in the
plumbing is impossible. When/if the plumbing bursts having compressed air
inside makes it a lot more dangerous.
On Tue, Feb 7, 2017 at 3:30 PM, L
I don't have a physical stop on my Z axis, putting one in would be a PITA. The
drive is exceptionally strong and it would be problematic to stop the axis that
way. If you're an idiot and jog it that way prior to homing, you can dismount
the axis.
There is a homing switch at Z+. It sounds des
On 02/08/2017 10:58 AM, Jon Elson wrote:
> Can anybody recommend step motor drivers for a Bridgeport
> Series-II mill?
> I know there are some awful Chinese units out there, I'd
> like to avoid recommending anything that would not be reliable.
>
> Anybody know the specs of the stepper motors they u
Some have used geckos.
http://steampunkworkshop.com/bridgeport-series-ii-cnc-geckomach3-conversion/
seems to be getting 60ipm out of it.
On 2/8/2017 10:58 AM, Jon Elson wrote:
> Bridgeport
> Series-II
--
Check out the
Can anybody recommend step motor drivers for a Bridgeport
Series-II mill?
I know there are some awful Chinese units out there, I'd
like to avoid recommending anything that would not be reliable.
Anybody know the specs of the stepper motors they used in
the Series-II?
Can Gecko 201/213 be used o
On Wednesday 08 February 2017 10:49:02 W. Martinjak wrote:
> On 2017-02-08 15:45, Gene Heskett wrote:
> > Thats not an armhf, Andy, thats intels latest tiny & low power
> > consumption board, but it speaks x86, not armhf.
>
> He meant this one:
>
> http://shop.udoo.org/usa/quad-dual/udoo-quad.html
On 2017-02-08 15:45, Gene Heskett wrote:
> Thats not an armhf, Andy, thats intels latest tiny & low power
> consumption board, but it speaks x86, not armhf.
He meant this one:
http://shop.udoo.org/usa/quad-dual/udoo-quad.html
http://www.udoo.org/docs/Introduction/Introduction.html
--
"In der W
On 8 February 2017 at 14:27, W. Martinjak wrote:
> What keeps you from using SPI?
Is there an SPI link between the processors?
This has been written since I stopped playing with mine, but uses a
serial link, and I was told on their IRC that the serial link is
USB-to-serial.
http://www.udoo.org/
On Wednesday 08 February 2017 09:04:25 andy pugh wrote:
> On 7 February 2017 at 22:39, Sebastian Kuzminsky
wrote:
> > Feel free to pitch in and donate a reliable, fast armhf build
> > machine to the linuxcnc buildbot if this is important to you.
>
> I am (maybe surprisingly) fuzzy on what consti
On 2017-02-08 15:04, andy pugh wrote:
> I got one with an eye to LinuxCNC use, but it turned out that the link
> between the Arduino part and Linux part was USB and so not very
> realtimey.
What keeps you from using SPI?
But I think it would be a good joice for the buildbot.
The arduino part coul
I've seen this implemented on commercial machines. Oftentimes the
button or switch is inside the control box. You really don't want to
make it easy for the operator to override the hard limits. After all,
they never should have gotten there in the first place!
Dave
On 2/7/2017 10:56 AM, S
On 7 February 2017 at 22:39, Sebastian Kuzminsky wrote:
> Feel free to pitch in and donate a reliable, fast armhf build machine to
> the linuxcnc buildbot if this is important to you.
I am (maybe surprisingly) fuzzy on what constitutes Armhf. But I am
wondering if the Udoo Quad might be a good c
Hi Jeff!
On 2017-02-08 03:21, Jeff Epler wrote:
> You have misinterpreted my remarks.
>
> I am not against "support[ing] the arm platform".
Yes, my reaction was a little bit hasty.
But it has been triggered by the forum post and some other comments on the
list..
> My IRC remarks are about the s
Watch out for the steam!
2017-02-08 3:44 GMT+01:00 Gene Heskett :
> On Tuesday 07 February 2017 18:30:18 Leonardo Marsaglia wrote:
>
> > Hello to all!
> >
> > I'm in the process of designing and planning a system to rapid
> > heating/cooling a mold for plastic injection. The project is still in
>
This company has a 4 axis "hat" board for the Raspberry Pi. It uses Pololu
style stepper drivers or you can get jumper boards for those sockets to use it
with external drivers. The ebay listing for the external driver jumper boards
shows how to use pieces of wire in the sockets if you don't feel
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