Author Topic: Controls section  (Read 15971 times)

Offline Julian

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Controls section
« on: July 21, 2011, 10:27:48 AM »
When I get a little more time I'll throw up some ideas for the controls section, but I thought I'd start a thread just to get things moving.  If anyone has any ideas, please post them up.

One idea I've had was to use the schematics of processors we already have and show positions of the various switches and sensors.

Also, as has been already suggested by Rob-b, a page on each item in the system, SSRs, PIDs, pressure switches etc showing examples, explaining their operation, how to mount them and how to wire them up.

All other suggestions welcome.
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Offline high compression ii

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Re: Controls section
« Reply #1 on: July 21, 2011, 11:59:05 AM »
Yup--Good plan...

I can do some schemes and have a processor half complete so can take pictures of the Oil-Pressure switch mounted in the remote-heater and the thermocouple also mounted in there....

That should give a bit of a start anyway....
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Offline Rotary-Motion

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Re: Controls section
« Reply #2 on: July 21, 2011, 08:48:56 PM »
that sounds a brilliant idea on both sides  8)

Offline Julian

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Re: Controls section
« Reply #3 on: July 21, 2011, 11:06:49 PM »
Right, initial thought is that we set up a new category ... "Processor controls and instrumentation".

Within that we can have various pages, but the primary one would be ... "Processor control schematics", as Alistair suggests.  This could contain a range of wiring diagrams covering the simplest to the most complicated, perhaps, in time, even Logic relays and PLCs.  All of the components mentioned on the schematics will have dedicated pages explaining as much as possible about each item.

Tony ... would it be possible to have specific areas of Alistair's schematics acting as links to pertinent pages?  I have vague recollections that this was possible with a very old part of CorelDraw, but I could be wrong!

We already have Keith's (he's been quiet the last few days!) float switch page and Tony's level/pressure switch page that could be moved to the category.

I think a Noddy's guide to controls, page would be of great use too those not too familiar with the discipline, perhaps a rewrite of my post with the 230v control circuit.

I love the idea of the automotive pressure switch, especially as it's from a Land Rover!  I've got an old, adjustable, industrial switch on my processor (not that I've got round to wiring it up yet!) so I think we need to cover all possibilities for all components, so perhaps wiring schematics need to simply say "pressure switch" rather than being specific.

Just my suggestions.

Open to any other thoughts.

If no objections, after a couple of days I'll create the category (if I can remember how!) and move the pages as a start.

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Offline Julian

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Re: Controls section
« Reply #4 on: July 21, 2011, 11:24:28 PM »
Tony ... would it be possible to have specific areas of Alistair's schematics acting as links to pertinent pages?  I have vague recollections that this was possible with a very old part of CorelDraw, but I could be wrong!

Just had a Google and answered my own question .... it's called an image map ... Doh!

Got some reading to do now unless anyone's an expert in such matters?
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Offline Julian

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Re: Controls section
« Reply #5 on: July 22, 2011, 12:11:16 AM »
God, I'm good!  I know modest old bugger!

Have a look here ... http://www.palmergroup.co.uk/Bio/image_map%20_test/Image_map_test.htm

Oil pressure switch and Cond. thermo sw.  Shocked myself ... it actually works!

Can't seem to get the schematic to come up on the wiki though, it just shows the html code instead of the png file.  Bit late now so not going to pursue it tonight.  If any one wants a play, it's here on the wiki ... http://www.biopowered.co.uk/wiki/Image_map_test.  The png file is already up loaded.

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Offline Rob-b

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Re: Controls section
« Reply #6 on: July 22, 2011, 09:15:27 AM »
Sounds good Julian

The proof of the pudding will be in the clarity of the info, I will need to do the electrics on my new piece of kit in the next few weeks so can test the theory by following the instructions when it is posted. I am putting off buying bits until I have the relevant info. I can get ahead a bit and order the PID, Alastair recomends this is one which will take a while to arrive.

http://www.ebay.co.uk/itm/New-DIN-Digital-PID-Temperature-Control-Controller-D1S-/250851779551?pt=UK_BOI_Industrial_Automation_Control_ET&hash=item3a67ee63df&clk_rvr_id=249281882983


Offline high compression ii

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Re: Controls section
« Reply #7 on: July 22, 2011, 09:38:37 AM »
Hey Rob-b...

That PID took exactly 7 days to arrive--Which I thought was pretty good!

I prefer it as for the User, its easier to program, there's no silly passwords to get into it and its better build quality...

Ive done a VERY basic, No Safety circuit PID and SSR scheme....
--Basically just to give idea how the PID/SSR is related/connected, rather than to follow in real life....

Tonight I'll do the same diagram with added safety circuits, one without additional SSR and one with....

Getting ther --Slowly--
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Offline Tony

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Re: Controls section
« Reply #8 on: July 22, 2011, 10:52:00 AM »
Sounds like a good plan to me :)

Julian,  if you wish to use image maps within the wiki we'll have to install this extension:

http://www.mediawiki.org/wiki/Extension:ImageMap

Let me know if you want this installed.

There is also another extension for converting existing image maps into the wiki format:

http://www.mediawiki.org/wiki/Extension:ImageMapConversion

I'm not sure we need this if you're creating maps from scratch.

Offline Julian

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Re: Controls section
« Reply #9 on: July 22, 2011, 04:25:49 PM »
Tony ...

If you could install the image map extension we can have a play.  The bitmap section of Corel will generate the image map code in html but if that doesn't work directly I think I should be able to wikiise it.

Alistair ...

Have you got a completed schematic I could start playing with?


One point I'd thought of was that the image map doesn't necessarily have to link anywhere, we can simply use the alt text to identify components or to add notes or further explanations of the graphics.

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Offline Rob-b

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Re: Controls section
« Reply #10 on: July 22, 2011, 06:19:44 PM »
Ok HC

I will order one up and get it here in anticipation.


Offline Julian

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Re: Controls section
« Reply #11 on: July 22, 2011, 08:07:42 PM »
Just so we have some sort of plan to work to, these are possible pages within the category “Processor controls and instrumentation”

Too many, too few, any missing, any not needed, anyone any comments?


Processor control schematics
PIDs and SSRs
Thermocouples
Temperature controllers
RTDs
Dummies guide to simple control circuits
Float switches
Pressure switches
Level switches
Pressure gauges
Temperature gauges
Sight tubes
Removing an immersion heater thermostat
Control enclosures
Indicator lamps
Low voltage power supplies
Fuses
Relays and latching circuits
Earthing
Mains supply
Cable sizing

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Offline Tony

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Re: Controls section
« Reply #12 on: July 23, 2011, 09:27:22 AM »
Tony ...

If you could install the image map extension we can have a play.  The bitmap section of Corel will generate the image map code in html but if that doesn't work directly I think I should be able to wikiise it.

Installed: http://www.biopowered.co.uk/wiki/Special:Version

Don't know if working though, as it depends on php DOM being enabled (I think it is - for XML parsing) and ImageMagick (which is definitely installed).
« Last Edit: July 23, 2011, 09:37:13 AM by tony »

Offline high compression ii

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Re: Controls section
« Reply #13 on: July 23, 2011, 10:59:28 AM »
Yes guys, I have a few diagrams, I see that one has appeared on the controls diagram page, the earliest I did I think...

On that same thread at goatforum 'adding pressure-level switch to prevent explosions' and at the end of thread, is the latest (and most complicated). Guess you can copy those, or I have the originals of all except the earliest.

Where do I upload the most basic diagram I mentioned earler?--Not all that familiar with the workings of wiki....
--Or should I send it to one of you guys?--You tell me whats best anyway.

Ive still a few diagrams left to draw, but they'll be adaptions or sections of whats been done already, so the differences should be clear to see....

You tell me whats needed diagram wise, and I'll sort it in next few days...
« Last Edit: July 23, 2011, 11:02:01 AM by high compression ii »
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Offline Julian

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Re: Controls section
« Reply #14 on: July 23, 2011, 11:30:00 AM »
Tony ...

If you could install the image map extension we can have a play.  The bitmap section of Corel will generate the image map code in html but if that doesn't work directly I think I should be able to wikiise it.

Installed: http://www.biopowered.co.uk/wiki/Special:Version

Don't know if working though, as it depends on php DOM being enabled (I think it is - for XML parsing) and ImageMagick (which is definitely installed).

Thanks Tony, it seems to work fine, see ... http://www.biopowered.co.uk/wiki/Image_map_test  Two switches top left.

Only difficult bit is working out the coordinates with out a graphics programme with the facility.

I'll add a sample code to the wiki mark up page on the forum.
Used Cooking Oil Collection website ... http://www.surreyusedcookingoilcollection.palmergroup.co.uk