rework station thermal capacitance problem...

[roy_bates]

i bought another rework hot air and soldering station for fun a while back.
the hot air side works fine...
while i was using it i found the soldering iron side cant do ground planes at all(even set to max temp about 500 Celsius),and takes ages to get to temperature(doesn't show actual temp,just temp setting)

i was wondering if anyone knows a fix for it,i think it uses a pwm method to heat the element haven't looked too deeply...

i think its a 852D+ copy.


its probably one for the tech guys.

thanks.

roy.


EDIT: @ hmm having a bit of a moment,mods,is this in the wrong area? if it is,could you move it please.

 

[ptp170]

You probably haven't got enough thermal mass in the end of the iron to transfer to the ground plane... You might also want to check the fit of the element against the iron. This should be really really snug but alas on some irons it's very slack giving no real surface to surface transfer. You could improve this by using thermal paste or if you're a bit pikey, copper grease

 

[roy_bates]

You probably haven't got enough thermal mass in the end of the iron to transfer to the ground plane... You might also want to check the fit of the element against the iron. This should be really really snug but alas on some irons it's very slack giving no real surface to surface transfer. You could improve this by using thermal paste or if you're a bit pikey, copper grease

tried all that bud,didn't work.

i think its an electrical problem.

 

[ptp170]

Knackered triac then?

 

[roy_bates]

Knackered triac then?

was thinking that bud,like i say i haven't looked into it deeply.

i dont think its the pic as it shows the master temp.

i'll have a look at a later date,cheers.

 

[demolition]

Use the hot air for a couple of minutes to heat up the ground plane to for example 100 deg. C, then it should be a lot easier to solder what you need with the iron.

 

[roy_bates]

Use the hot air for a couple of minutes to heat up the ground plane to for example 100 deg. C, then it should be a lot easier to solder what you need with the iron.

yes mate,the thing is any of my other temp controlled irons will easily do any ground plane with ease.even with heatsinks still on them.

thats why im wondering why this cant,considering its 50 watt.

even set to quite a high setting just to melt solder on its own?

around 350-400 Celsius i dont think thats right mate. or it hasn't be calibrated properly.

 

[Bryce]

How many Watts is the iron?

Bryce.

 

[roy_bates]

How many Watts is the iron?

Bryce.

i'll have look a bit later mate,i think its 50


EDIT:hmm,it doesn't seem to say...
im going to take this apart and and have a peek.

EDIT2: it seems to be a hakko 907a copy so if its the same the element should be 50 watt


EDIT3: it starts to melt solder on the tip at 350 c...according to the readout on the display and thats .7mm solder

 

[ptp170]

I think you need to verify the tip temperature as something's well out there!

 

[roy_bates]

I think you need to verify the tip temperature as something's well out there!

i'll have to give it a miss today,as im tired of looking at it...

ive got a type k thermo couple somewhere,i'll investigate at a later date.


thanks all.

EDIT: when i got it,it was brand new in the box and never turned on.ive got a feeling its not calibrated properly.or a problem with the heating element somehow,but i do have a spare element for this.

 

[ShambleS1980]

dosent sound like its 50w at all. posiibly its lower wattage?

also (i some how doubt you wouldnt have cheked) is the tip oxidized at all cuz that can cause havoc with actual temps at the tip and how hot the iron needs to be for the tip to be at the correct temps.

it does sound like the iron is 15-25W rather than 50w. but your temperature readings seem to be way off. 150c or so out id guess from what you just said.
15-25 wats would help explain the inability to do ground planes

 

[roy_bates]

its not oxidized at all,it was new mate, shiny as a pin.(inside and out)

just like the other tips it came with.

it uses a hakko copy, iron model 907A pencil and same elements.


i do believe its out by miles mate.

 

[Zetr0]

Have you calibrated it my friend?

My 852d+ was a pain until I actually calibrated it. I think the hako's are the same, you should find a small rubber grommet type plug that you need to remove on the front of the device and then with a terminal drive adjust the calibration...

When I got mine it was waayyyyy out, over 130c out - (thats to say when it was reading 280c it was in fact about 150c!)_

I hope that helps.

 

[rkauer]

Pencil-sized hot irons will never pass 25W in power. As Zetr0 said, you might have to calibrate the temperature.

But you'll never have enough juice to do ground planes.

 

[Bryce]

Professional soldering irons (even pencil sized) will easily go above 50W. The Ersa iCon Nano (my favourite iron) can put out 80W.

Bryce.

 

[roy_bates]

i haven't calibrated it yet,there is no rush to do it.

i have three other soldering irons that can easily do ground planes as well as delicate work so..


i think it does have a adjustment pot inside,i'll get around to it and report back when i do.