mini 12v case cooling fans,controlling speed?

[General-Lee]

A lot of control boxes and screens get pretty toasty

If I park outside our farm office for lunch on a hot sunny day and jump back in GreenStar screen doesn’t like it and starts doing funny things like freezing.

 

[Pheasant Surprise]

If I park outside our farm office for lunch on a hot sunny day and jump back in GreenStar screen doesn’t like it and starts doing funny things like freezing.

Yeh not surprising. Leave your phone on the dash in the sun, no air con, and see how hot it gets after 10 minutes.

 

[davidroberts30]

Yeh not surprising. Leave your phone on the dash in the sun, no air con, and see how hot it gets after 10 minutes.

Especially charging

 

[davidroberts30]

No good making things last...

 

[johnboy87]

No,just fan

Could be way off the mark, but would the fan connection be anything to do with the oil cooler fan rather than a control box fan?

 

[Mursal]

Feck ................

 

[davidroberts30]

Could be way off the mark, but would the fan connection be anything to do with the oil cooler fan rather than a control box fan?

No
The oil cooler is totally seperate to the control box

 

[Pheasant Surprise]

Could be way off the mark, but would the fan connection be anything to do with the oil cooler fan rather than a control box fan?

If it was, it would have to be via a relay to handle the power of the oil cooler fan and the wiring and socket would be of the same size as the blue/yellow/brown/white solenoid wiring as in the photo.

 

[johnboy87]

Twas just a thought rather than over looking the obvious

 

[davidroberts30]

If it was, it would have to be via a relay to handle the power of the oil cooler fan and the wiring and socket would be of the same size as the blue/yellow/brown/white solenoid wiring as in the photo.

Theres a 30amp wire into a D plug in the cab then on to the temp sensor then the fan

 

[Pheasant Surprise]

Theres a 30amp wire into a D plug in the cab then on to the temp sensor then the fan

Yeh I was on about if, theoretically, you had the oil cooler fan switched from that board, then to handle the current draw for the fan, there would need to be either a plug in or solid state relay on the board.

If as you say the fan is powered direct/externally then the thermo switch would be man enough to handle the current.

 

[James]

Theres a 30amp wire into a D plug in the cab then on to the temp sensor then the fan

Does that plug get really hot on yours?

 

[General-Lee]

Does that plug get really hot on yours?

Ours is wired direct to battery.

 

[davidroberts30]

Does that plug get really hot on yours?

No

 

[Mursal]

No,just fan

We don't like plugging stuff into boards (expensive boards) when you don't have any guidance as to what the board can actually drive, current wise.
Maybe get in touch with McConnell for a fan or at least the details of the fan they plug into the board, then your not working blind.

Worst case:
Th board cant drive the fan for long periods and decides to melt a track, fine if its only going to the fan output.
But if its driving something else on the board, you might be vexed when it stops working.

With the standalone fan and speed controller, you really cant go wrong.

 

[davidroberts30]

We don't like plugging stuff into boards (expensive boards) when you don't have any guidance as to what the board can actually drive, current wise.
Maybe get in touch with McConnell for a fan or at least the details of the fan they plug into the board, then your not working blind.

Worst case:
Th board cant drive the fan for long periods and decides to melt a track, fine if its only going to the fan output.
But if its driving something else on the board, you might be vexed when it stops working.

With the standalone fan and speed controller, you really cant go wrong.

never had much joy contacting mcconnel
the fan i got is 0.06amp so guess it will be fine

 

[davidroberts30]

We don't like plugging stuff into boards (expensive boards) when you don't have any guidance as to what the board can actually drive, current wise.
Maybe get in touch with McConnell for a fan or at least the details of the fan they plug into the board, then your not working blind.

Worst case:
Th board cant drive the fan for long periods and decides to melt a track, fine if its only going to the fan output.
But if its driving something else on the board, you might be vexed when it stops working.

With the standalone fan and speed controller, you really cant go wrong.

ive emailed the service department again but not holding out much hope

 

[davidroberts30]

Swiss cheese effect is what you’re after

talking of this how good is your Pi and size calculator??
38mm diameter fan by my reckoning needs 14x 10mm holes to allow the air out??

 

[Pheasant Surprise]

talking of this how good is your Pi and size calculator??
38mm diameter fan by my reckoning needs 14x 10mm holes to allow the air out??

Area = pi x (radius) squared

38mm diam. fan, cross section = 1134 mm2
10mm hole, cross section = 78 mm2

Therefore you need at least 1134 / 78 = 14.5 holes or 15 if you’ve got enough cheese to work with.

 

[davidroberts30]

Area = pi x (radius) squared

38mm diam. fan, cross section = 1134 mm2
10mm hole, cross section = 78 mm2

Therefore you need at least 1134 / 78 = 14.5 holes or 15 if you’ve got enough cheese to work with.

you got same workings as me
didnt want to go too big to keep out fingers