Bakon BK950D

[stj]

Re: Bakon BK950D

first you need to understand the iron cartridge,
the element and sensor are in series.

so the base senses the voltage returning from the iron in between the pulses from the fet powering the element.

if you want to use a battery, you just need to use the control board and get a small 5v regulator to power the microcontroller from your input voltage.

now to your question.
if you look at the upper right of the second diagram, you will see the iron signal just before the fet branches down to an LM358 op-amp.
this then feeds the analog input on the microcontroller.

[sam_sam_sam]

Re: Bakon BK950D

I have thought of buying one of these iron's to run off a 20 volt battery but I want to make sure that it has temperature control

[sam_sam_sam]

Re: Bakon BK950D

the tips are 70-75w at 24v,
i dont know why the controller is 19v but i suspect it uses a laptop transformer.

the russian guys have modded it for 24v btw.
i wont post the sketchy details now,
but heres the schem of the original unit.

I going to ask really stupid question here but where is the temperature sensor part of this circuit

I see how the iron get it power from but how does it control the temperature where is the sensor part

[stj]

Re: Bakon BK950D

the rubber bit is called the "strain-relief" - push it back in.

[Fast Alpha]

Re: Bakon BK950D

It is really good at melting silver solder.

[diif]

Re: Bakon BK950D

Yeah, the rubber grommet is loose on mine too.It doesn't affect usage at all.

[Fast Alpha]

Re: Bakon BK950D

Part of this iron near where the tip goes in it came off.
It separated from the holder.

Anything like this happen to you too.

Looks like loosy made.

[stj]

Re: Bakon BK950D

none run at 75w out-of-the-box.

[miksi]

Re: Bakon BK950D

So does your Bakon 950D run with 75W out of the box? I wonder if I got a fake one, if all 950D units are only 45W and always were, or if Bakon secretly changed the product some time ago?

The seller offered me 3 USD discount, I am still not clear what to think of all this. Damn …

[stj]

Re: Bakon BK950D

the tips are 70-75w at 24v,
i dont know why the controller is 19v but i suspect it uses a laptop transformer.

the russian guys have modded it for 24v btw.
i wont post the sketchy details now,
but heres the schem of the original unit.

[miksi]

Re: Bakon BK950D

Hello, I also got a Bakon 950D, 75W soldering station. Did you guys check with a power meter? My unit uses much less power than claimed. A T12 tip is about 8 Ohm, the station outputs ~19V, which gives only 45W.

Google this: UnionTest UW501
That is a (russian) station that looks pretty identical to the 950D, but it truthfully claims only 45W. I have the suspicion that many 950D units which are advertized as 75W are in fact only 45W. So, 40% less powerful. I feel a little bit cheated. Did I miss something? What do you think?

[jazzie366]

Re: Bakon BK950D

just got one.
so as you do - i stripped it

soldering and component placement is good.
quality feels good.

input is fused, has an inrush limiter & a choke before the rectifier.
nice design

well worth £18 i spent on it!!


now the fun part - i know your all wondering.
the caplist!

primary smoothing,
100uF 400v 18x30mm CHONG brand 105' no series marking.

secondary's
1000Uf 25v 10x20mm JWco brand CH series??
1000Uf 25v 10x20mm AE brand KF series.
and
2x 22uF 50v 5mm AE brand KF series.



so, who can find datasheets for CHONG, AE & JWco ??

Chong: Shit, get rid of it. ChongX is better, Chong is fake, ratings usually aren't true.
JWCo: Largest capacitor manufacturer in the world, 1 billion caps per month produced. I have one in a fish tank that I have, 5 years old and still going, I don't think JWCo is that bad, they're definitely not that great though.

Can't find anything of AE, probably some random generic.

[diif]

Re: Bakon BK950D

IPA and a brush followed by a wipe with a clean room wipe.

[Fast Alpha]

Re: Bakon BK950D

How do you get rid of the flux on your items, how do you remove the flux off the motherboard.

[diif]

Re: Bakon BK950D

No adapter. As i said, cut off the non UK plug and stick a UK one on. It's three core that comes out of the Bakon.

Solder from RS, Chemtronics braid for BGA, Gootwick for smaller, Amtech 559 flux for important jobs, cheap Kingbo in a syringe for eveything else.

Photo of some of my bits including how to wire up a UK plug.

[Fast Alpha]

Re: Bakon BK950D

http://www.maplin.co.uk/p/schuko-to-...pter-13a-tz55k

That is the adapter needed. I want to see how you did it pal.
I got to make sure I do it properly, your mobile phone has a camera on it.

Also what braid and solder do you use for your work.

[diif]

Re: Bakon BK950D

You don't know how to wire up a UK plug without a photo ?
Or are you saying the mains wire on your 950D had only two wires and no earth ?

[Fast Alpha]

Re: Bakon BK950D

Why not just cut the plug off and attach a UK one ?

Post a photo of your plug and equipment.
To show me what you did inside the plug so I can copy, thank you.

[diif]

Re: Bakon BK950D

Why not just cut the plug off and attach a UK one ?

[Fast Alpha]

Re: Bakon BK950D

I got a euro to UK plug adapter, it came with the item.
It states on it that it should be grounded, but the device only has two plug connectors. The uk plug adapter has three.

So how do I make sure the soldering station is pluged in correctly?

WITH IT BEING GROUNDED.