- Fri Jul 30, 2010 2:08 am
#106326
Hi guys,
Ok, so last year I bought a paste dispenser from China...at the same time I bought some solder paste in a syringe on Ebay.
I didn't get around to using it until about a month ago - the long & short is that the paste didn't flow.
I then realise that it had probably long expired, wasn't kept refrigerated etc.
So i read about the success of Deal Extreme soldered paste- ordered some....grew a beard waiting.
Alas, they don't sell it in syringes, so when it arrived, I scooped out a 'dollop' into the dispenser syringe - hey presto ....it worked (ie flowed)....but wait. It only worked the one time! ie...since then, it's not reflowing (just a grey hard crud - which is not the end of the world, but annoying - all I do in this case is simply take a soldering iron to the hard crud & it flows well)
So to my questions...
1. If the paste is in a syringes, I'd have thought it's fairly 'air' tight (bar the tiny bit exposed at the nozzle)....so how come it's going off so quick.
2. Is there anyway of rejuvinating paste that isn't flowing, because this is gonna get costly quick! (I'm thinking here along the lines of adding in some liquid flux)
Also, for any of you guys using a solder paste dispenser...what type of nozzle are you using? (metal needle type....or plastic nozzle - I bought some from Deal extreme too - but not having great success with them)
Ok, so last year I bought a paste dispenser from China...at the same time I bought some solder paste in a syringe on Ebay.
I didn't get around to using it until about a month ago - the long & short is that the paste didn't flow.
I then realise that it had probably long expired, wasn't kept refrigerated etc.
So i read about the success of Deal Extreme soldered paste- ordered some....grew a beard waiting.
Alas, they don't sell it in syringes, so when it arrived, I scooped out a 'dollop' into the dispenser syringe - hey presto ....it worked (ie flowed)....but wait. It only worked the one time! ie...since then, it's not reflowing (just a grey hard crud - which is not the end of the world, but annoying - all I do in this case is simply take a soldering iron to the hard crud & it flows well)
So to my questions...
1. If the paste is in a syringes, I'd have thought it's fairly 'air' tight (bar the tiny bit exposed at the nozzle)....so how come it's going off so quick.
2. Is there anyway of rejuvinating paste that isn't flowing, because this is gonna get costly quick! (I'm thinking here along the lines of adding in some liquid flux)
Also, for any of you guys using a solder paste dispenser...what type of nozzle are you using? (metal needle type....or plastic nozzle - I bought some from Deal extreme too - but not having great success with them)