Blackbird Rush
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| posted on 11/10/09 at 03:26 PM |
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Cleaning up PCB's& Megasquirt
Following my thread regarding the problem i had with my megasquirt...
Thread Linky
I now have a working fuel pump feed (swapped the transistor for a new one) running on the stimulater anyway.
Next is to work through the settings and tune it to my install, but first i wanted to clean up the flux residue on the PCB, bought a can of maplin PCB
flux residue cleaner (does what is says on the tin - i think not!) which has not done a great job of cleaning up the pcb leaving a worse residue on
there than before!
Whats a good product/process to clean up the PCB before i refit it back into the car?
Ash
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big-vee-twin
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| posted on 11/10/09 at 03:56 PM |
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Think you may need to trigger a relay with the transistor, to feed power to the pump not directly or it will burn out.
Flux sticks quite well so you may need to scrape it off where it crosses two tracks but otherwise wouldn't bother
Duratec Engine is fitted, MS2 Extra V3 is assembled and tested, engine running, car now built. IVA passed 26/02/2016
http://www.triangleltd.com
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02GF74
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| posted on 11/10/09 at 04:09 PM |
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depends on the resin - I am sure I have use paraffin (or maybe petrol) and a tooth brush to clean off resin.
I still use the lead based solder and it works for that; dunno about the new lead-free solder resin.
make sure board is dry before poweing up; in any case, the resin is just cosmetic, should not affect performance of the board.
and listen to ^^^^^ - you cannot drive the pump form that transistor - use a relay.
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Blackbird Rush
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| posted on 11/10/09 at 04:42 PM |
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Yes there is a relay, OK if removing the flux is not that important then i'll leave as is .......
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mark chandler
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| posted on 11/10/09 at 04:57 PM |
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methelated spirits and a tooth brush for me, then washed in warm soapy water.
You want to get the flux off
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iank
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| posted on 11/10/09 at 05:30 PM |
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Depending on the flux you may need to get it off as some are corrosive.
Farnell (and almost certainly RS) sell a large range of different flux cleaners, id try meths on a cotton bud first (small inconspicuous area
etc.)
Once it's all working I'd consider getting a can of conformal coating to protect it against moisture.
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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Blackbird Rush
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| posted on 11/10/09 at 06:10 PM |
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I'll pick up some meths tomorrow whilst i'm out & about then....
Cheers
Ash
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Confused but excited.
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| posted on 11/10/09 at 06:50 PM |
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Best thing that I have used is a glass fibre brush. It looks like a fat propelling pencil.
Bought it from RS Components years ago. As the glass wears down you just push more out.
Tell them about the bent treacle edges!
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stevebubs
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| posted on 11/10/09 at 07:43 PM |
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pop into maplins and get some spray flux cleaner....
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Brommers
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| posted on 20/10/09 at 08:38 AM |
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quote:
Originally posted by stevebubs
pop into maplins and get some spray flux cleaner....
OP said 'bought a can of maplin PCB flux residue cleaner (does what is says on the tin - i think not!) which has not done a great job of
cleaning up the pcb'.
These days I tend to use brake cleaner solvent from a spray can for pretty much all solvent-related activity. It's effective and cheap (£1 from
the local pikey shop) and hasn't dissolved any PCBs so far. However, it does dissolve powdercoating...
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