On Thu, Feb 26, 2015, at 09:30 AM, richsh...@comcast.net wrote:
> Also keep the safety stuff completely separate from the control stuff. By
> that I mean the overtemp limiter controls a mechanical contactor, not just
> turns the SSR signal off.
Yep. True story from work a few years ago: W
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I agree to Kirk.
Also consider BeagleBone and Machinekit. BBB has several ADC channels
already. I think it should be easy to use its SPI in user space too.
There are some items from my collection to watch:
http://r.ebay.com/TFtcVt
And some thoughts, found on web-search about serial interfaces and
It'd probably be a whole bunch faster if you got 15 of these
http://www.ebay.com/itm/New-Universal-Digital-PID-Temperature-Controller-with-SSR-Output-and-2-Alarms-/251847129323
(or similar) 14 for your machine and a spare (or two)
They have alarm outputs so you could wire them all up to take some
On 11/08/2013 02:38 PM, Jean-Michel Pouré - GOOZE wrote:
> Dear all,
>
> I need to know to what extend Linux CNC could be used to manage an
> infrared SMT reflow oven. Any ideas are welcome.
Linuxcnc could handle your oven control. In my opinion the advantages
would be:
-Common, cheap, non-propri
On 09.11.13 12:14, andy pugh wrote:
> On 9 November 2013 11:54, Erik Christiansen wrote:
>
> > Fortunately the temperature in a reflow oven needn't be regulated to
> > within one degree, AIUI, because the A/D converter on an AVR (Arduino)
> > or any other 8 bit MCU that I've come across is only 8
On 9 November 2013 11:54, Erik Christiansen wrote:
> Fortunately the temperature in a reflow oven needn't be regulated to
> within one degree, AIUI, because the A/D converter on an AVR (Arduino)
> or any other 8 bit MCU that I've come across is only 8 bits, minus
> offset and gain errors, unless
On 09.11.13 11:46, Jean-Michel Pouré - GOOZE wrote:
> Le vendredi 08 novembre 2013 à 23:00 +, andy pugh a écrit :
> > It might be the case that the Arduino Mega (16 analogue inputs) is a
> > better choice for the oven controller.
While I haven't used any of the PID algorithms at:
http://play
On 09/11/13 10:46, Jean-Michel Pouré - GOOZE wrote:
> Le vendredi 08 novembre 2013 à 23:00 +, andy pugh a écrit :
>> It might be the case that the Arduino Mega (16 analogue inputs) is a
>> better choice for the oven controller.
> Thanks for all answers. I am not aware yet of the temperature sen
Le vendredi 08 novembre 2013 à 23:00 +, andy pugh a écrit :
> It might be the case that the Arduino Mega (16 analogue inputs) is a
> better choice for the oven controller.
Thanks for all answers. I am not aware yet of the temperature sensors.
Apparently, they are built-in the infrared heaters
Assuming that this is a one-off and you just want it to work so you can
make some money off it. I would consider using some standard off the
shelf industrial hardware - the advantage is that you you don't have to
mess with unknown quality hardware.
I'd look for a low cost PLC that has a decen
On 11/08/2013 11:38 PM, Jean-Michel Pouré - GOOZE wrote:
> I need to know to what extend Linux CNC could be used to manage an
> infrared SMT reflow oven. Any ideas are welcome.
That sounds a bit like using a hammer to screw a bolt...
Sure, you could modify configs and make it work, if maybe not a
On 8 November 2013 22:38, Jean-Michel Pouré - GOOZE wrote:
> My idea was to connect LinuxCNC with:
> * One X axis
> * One or more ventilators
> * 14 temperature sensors
> * I don't know if power is being switched off/on or if it is leveled.
> * Alarm censor triggering emergency shutdown.
Sounds
I just read the last answer. HAL should be able to do the work. I need
more information about my hardware and will get back.
smime.p7s
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Dear all,
I need to know to what extend Linux CNC could be used to manage an
infrared SMT reflow oven. Any ideas are welcome.
I just purchased an old professional oven, a small one, around 2.5
meters long (some ovens can be 5 meters long or more). It has 7 heating
zone up and 7 heating zones down
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