Hi Mark
Very neat looking construction.
The reading that you are getting are correct if taken on open tube lines.
The vacuum thresholds, high and low, can be adjusted with the pots.
It is also possible to adjust to actual atmospheric pressure when all connected up.
I incorporated a vacuum gauge into the one that I built to give a cross reverence to the vacuum being pulled.
What are you going to use for the tanks.
Mick
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Vacuum Pump Control
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mjcp
- Posts: 183
- Joined: 29 Jul 2015, 08:14
- Location: A wind swept hill with no wind, in driving distance of Windsor, UK
- Contact:
Re: Vacuum Pump Control
Thanks for the positivity, Mick!
I've had a quick look on gumtree and there's no free fire extinguishers locally, so "plan b" will be to follow your method and use 4" pipe. Was yours just the standard grey soil pipe? (I saw a nice looking DIY pump on a YT video where the pipes had nice domed caps, but I can't see those in the UK
)
M
I've had a quick look on gumtree and there's no free fire extinguishers locally, so "plan b" will be to follow your method and use 4" pipe. Was yours just the standard grey soil pipe? (I saw a nice looking DIY pump on a YT video where the pipes had nice domed caps, but I can't see those in the UK
)M
m̶j̶c̶p̶ Marc
Hanger -
Some (now) pristine models that are un-flown for a year.
Hanger -
Some (now) pristine models that are un-flown for a year.
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Mick Tomlin
- Posts: 35
- Joined: 18 Mar 2015, 10:22
- Location: East Sussex
Re: Vacuum Pump Control
Hi Mark
The pipe that I used is standard solid wall 4 inch waste pipe with suitable cap ends that fit. Beware that not all 4 inch cap ends are the same. Must be solid wall and not the egg box inner wall type pipe.
An alternative method would be a lightweight propane gas cylinder. These are being phased out and scrapped and it may be possible to get one from a local dealer.
You will have to be very careful and make sure that you purge it of all vapour before converting it.
Carefully remove the top fitting and fill and flush with water is one method, the other method could well singe your eyebrows
A 7kg bottle will be more than ample for your requirements and weighs next to nothing being aluminium.
Mick
The pipe that I used is standard solid wall 4 inch waste pipe with suitable cap ends that fit. Beware that not all 4 inch cap ends are the same. Must be solid wall and not the egg box inner wall type pipe.
An alternative method would be a lightweight propane gas cylinder. These are being phased out and scrapped and it may be possible to get one from a local dealer.
You will have to be very careful and make sure that you purge it of all vapour before converting it.
Carefully remove the top fitting and fill and flush with water is one method, the other method could well singe your eyebrows
A 7kg bottle will be more than ample for your requirements and weighs next to nothing being aluminium.
Mick
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mjcp
- Posts: 183
- Joined: 29 Jul 2015, 08:14
- Location: A wind swept hill with no wind, in driving distance of Windsor, UK
- Contact:
Re: Vacuum Pump Control
I've noticed a slightly odd symptom:
When the toggle button for the pump is triggered, the pump run time counts as expected and the pump relay works is /ON solid.
So far so good...
But, with the toggle UN-triggered, the pump LED (and the relay / pump control) flashes on/off together with the warning LED. Additionally, the counters count down 1 second and then flash / reset back to their starting points.
Any ideas anyone?
M
When the toggle button for the pump is triggered, the pump run time counts as expected and the pump relay works is /ON solid.
So far so good...
But, with the toggle UN-triggered, the pump LED (and the relay / pump control) flashes on/off together with the warning LED. Additionally, the counters count down 1 second and then flash / reset back to their starting points.
Any ideas anyone?
M
m̶j̶c̶p̶ Marc
Hanger -
Some (now) pristine models that are un-flown for a year.
Hanger -
Some (now) pristine models that are un-flown for a year.
-
Mick Tomlin
- Posts: 35
- Joined: 18 Mar 2015, 10:22
- Location: East Sussex
Re: Vacuum Pump Control
Hi Mark
Are you pulling a vacuum when this happening ??
Mick
Are you pulling a vacuum when this happening ??
Mick
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mjcp
- Posts: 183
- Joined: 29 Jul 2015, 08:14
- Location: A wind swept hill with no wind, in driving distance of Windsor, UK
- Contact:
Re: Vacuum Pump Control
Sorry for the delay!
No, just bench running with nothing else attached.
Marc
m̶j̶c̶p̶ Marc
Hanger -
Some (now) pristine models that are un-flown for a year.
Hanger -
Some (now) pristine models that are un-flown for a year.