Author Topic: EEVblog #542 - ZD985 Desoldering Station  (Read 107793 times)

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Offline arekm

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #100 on: November 17, 2013, 06:38:19 pm »
Doesn't seem to be. Ask them directly, email, phone, skype addresses is at top left corner of their page.
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Online all_repair

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #101 on: November 18, 2013, 10:23:47 am »
The ZD-915 still isn't available.

Just found this. Looks like it was "inspired" :P by the Hakko 808:

DON'T buy this.  I bought one from aliexpress.  Tested 20 min, OK.  Mindful that the other end also running a business so I did not want to hold on payment, acknowledged the acceptance of good.  Continued using for 1hour, and smoke came out, and the motor was burned.  When I asked for help from seller, and even wanting to buy a motor, she asked why would I want a burnt-desoldering iron for and asked me to send it to a repair shop for repair.

Anyway, I managed to buy the replacement motor from China, and so far the desoldering iron still hold, but I found that the motor could not be run for a prolong duration.  If you press the suction for more a minute, the motor shall overheat; and if you do that for 5 minute, it shall smoke out.

This "Hwang Hua", or yellow flower brand is still a few year away. 
 

Offline dunkemhigh

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #102 on: November 18, 2013, 10:21:44 pm »
I also managed to buy a bag of 20 (yes 20) complete new guns

Did you win these on Ebay, and then have the vendor ship them to the wrong person?
 

Online Fraser

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #103 on: November 18, 2013, 10:31:44 pm »
Sorry I don't understand your question.
 

Offline dunkemhigh

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #104 on: November 19, 2013, 01:20:11 am »
Your message just rang a bell. A while back I won some parts on Ebay, and lost on a job lot of the guns. The vendor (same for both auctions) shipped everything to me, and I then had to figure out who actually won the guns and then get in contact and ship them to the rightful owner. I reckon you would have realised if that (the rightful owner) was you, so it obviously wasn't.

Mind, knowing what I do now maybe I should've kept quiet and kept the lot :)
 

Online Fraser

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #105 on: November 19, 2013, 10:27:53 am »
ahhh OK.

No not me. There have been a lot of these guns sold in batches though. I surmised that they were scrapped due to a production fault.
 

Offline Six_Shooter

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #106 on: November 23, 2013, 09:35:08 pm »
I hadn't considered getting a desoldering station until I watched this video, I didn't think they could be that much easier to use than a soldering station and a hand held desoldering pump, but man, this video made it look very easy. I'm going to be looking into getting one now.
 :-+
 

Offline AndersAnd

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #107 on: November 23, 2013, 11:38:13 pm »
For anyone who has access to an air compressor I highly recommended getting a desoldering station you can just plug into a compressor instead of the models with an internal suction pump.
The ones that use an external compressor instead has much better suction.
The internal pumps first have to accelerate when you press the button so the suction isn't instant like with an external air compressor, but instead the suction accelerates much slower. This makes it harder to suck up all solder. For some holes to pin sizes the difference is bigger than for other.

I've used Weller desoldering stations both for compressed air and with internal suction motor a lot in previous jobs, and they are worlds apart when it comes to sucking out all solder in very tight spaces between hole and pin. And the one with internal motor is loud as hell, it actually sounds a lot like a sheep when you press the button, so at work we just called it the sheep. But of course an air compressor can be very loud too if it's the piston type and located in the same room as you. You can get silent air compressors based on refrigerator/freezer compressors instead, or you can build your own DIY compressor from and old refrigerator/freezer compressor (Google it).

Of course the ones with internal suction motor has the advantage of being much more portable if you need to use it outside your regular workshop.

Not sure if there's any cheap Chinese desoldering stations for air compressors though, has anyone come across any cheap ones?
 

Offline AmmoJammo

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #108 on: November 23, 2013, 11:43:17 pm »
The internal pumps first have to accelerate when you press the button so the suction isn't instant like with an external air compressor, but instead the suction accelerates much slower.

The Pace desoldering station I have appears to have a much higher suction at the exact moment you press the trigger, then the suction drops back to normal.

You can hear the pump and motor run faster for a fraction of a second to create a higher vacuum surge when you first press the trigger.

Perhaps these cheaper stations could be modified to do this, by over driving the pump motor for quarter a second or something ;)
 

Offline Joule Thief

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #109 on: December 25, 2013, 12:29:16 pm »
ahhh OK.
I surmised that they were scrapped due to a production fault.

I recently purchased the ZD-915 unit from a seller in Florida, USA.  $119 USD
The new unit powered up fine and I reelocated the unit to my bench. The very next powerup resulted in no digital display (the backlight was on) and no heat or vacuum functions. The seller accepted a return and sent out a replacement unit. The replacement unit lasted about 3 weeks and died in the very same manner. When I asked if they had issues with this model, the answer was as expected, "No". When I suggested this was getting expensive shipping units back and forth they said "keep the defective unit and we will refund your money".

OK. Now I have what appears to be a dead control board and a free desolder station if I can get it to work.

On disassembly of the control board, I found the following


several soldering issues are present over the entire pcb






there are components under there somehere  :palm:





and a few places that need less solder and a few that need more





and this gets a little scarey too



time to pick up some solder wick to fix my desoldering station

wait - is that like dividing by zero on a calculator?   
« Last Edit: December 25, 2013, 12:36:53 pm by Joule Thief »
Perturb and observe.
 

Online Fraser

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #110 on: December 25, 2013, 03:15:48 pm »
Those soldering faults are truly appalling !.

That almost looks like sabotage by the manual soldering operative.
 

Offline Skimask

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #111 on: January 18, 2014, 05:46:46 am »
My notes on my just received ZD985.
Clean up the motor wires, replace the tubing aroud the motor, remove a few solder bridges and blobs... Should be good to go for awhile.

NOTE:  I do not claim to be any sort of video production professional.  This will most likely be 10 minutes of your life that you won't get back.  Complaints are hereby ignored.



I didn't take it apart.
I turned it on.

The only stupid question is, well, most of them...

Save a fuse...Blow an electrician.
 

Offline GreyWoolfe

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #112 on: January 19, 2014, 11:55:36 pm »
I received my ZD985 over Christmas and played with it on a board that came out of something.  After a little practice, I am able to remove solder and leave the pad.  I am very happy with it.  I will go into the shed and grab some fiberglass batting to see how that works.  I really see no issues for hobbyist use especially with the availability of cheap parts/consumables.  How long it lasts, remains to be seen.
I am of the age that my brain no longer says "maybe I shouldn't say that" but "what the heck, let's see what happens"
 

Offline N2IXK

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #113 on: January 20, 2014, 12:55:41 am »
For anyone who has access to an air compressor I highly recommended getting a desoldering station you can just plug into a compressor instead of the models with an internal suction pump.
The ones that use an external compressor instead has much better suction.
The internal pumps first have to accelerate when you press the button so the suction isn't instant like with an external air compressor, but instead the suction accelerates much slower. This makes it harder to suck up all solder. For some holes to pin sizes the difference is bigger than for other.

For many years I made do with a homebrew contraption using a fridge compressor as a vacuum pump, evacuating an old freon tank as a "vacuum reservoir", to provide instant suction.  On off control was a footswitch, triggering a solenoid valve between the tank and the handpiece (one of the Radio Shack cheapies, with the rubber suction bulb removed and replaced with an inline filter and hose.). A vacuum switch on the tank cycled the vacuum pump on and off as needed to maintain a vacuum level in the tank, so the pump wasn't constantly running.

Worked great for salvaging/removing parts, from single or double sided boards. Multilayer stuff was a bit much for it, so it was replaced with a air-powered Metcal system a few years ago.
"My favorite programming language is...SOLDER!"--Robert A. Pease
 

Offline rolandpenplotter

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #114 on: January 20, 2014, 12:57:57 am »
The irony of a soldering product that isn't soldered properly...

The (just noticed) punnery of using "irony" in the above sentence...
 

Offline vasonline

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #115 on: February 28, 2014, 06:16:42 pm »
After looking for the ZD-915 and ZD985 in europe.
 I settled for a US Hakko 808 with 230->120V transformer. Even with shipping and import tax, it's still a good deal.
Bought it from Matt. (got it very fast over here - Thx!)

I unpacked it today...
However I am less than happy with it: the pump motor runs uneven. It speeds up and slows down every 2 seconds
Is there something wrong with it? Does your hakko's 808 motor runs uneven on 110-120V ? Or has it something to do with
me trying to run a US 120V @ 60Hz Hakko on 120V @ 50Hz ?
The heater works fine.

I did desolder some single side pcb components with ease. But I can bring the motor almost to a standstill when
doing a double sided pcb.

- Weight balance is excellent.
- It all feels and is very well made.
« Last Edit: February 28, 2014, 06:27:15 pm by vasonline »
 

Offline linux-works

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #116 on: February 28, 2014, 07:42:04 pm »
my 808 does not speed up or slow down.  maybe you have some clogs or need to change filters?

hard to believe the 808 costs THAT much on oz!  what a crime that is.  it was $150 at frys a few years ago and I grabbed one.  I don't love the weight, but as an all-in-one unit, its hard to beat, especially if you can afford it where you live.

I'd love to have better temp control and regulation, but for what it is, its still very usable and beats the hell out of manual blue vacuum pumps.  I stopped using wick a long time ago since I never found it to be the proper thing for unsoldering.  absorbing excess solder, yes, but useless for desoldering.

(I will admit to using wick to help me solder smd chips; what people call a 'flood and suck' method, lol; you oversolder, almost like the videos show on chipquick, then you drag the wick across the pins (gently!) to pick up excess solder.  it works well but is abrasive and I stopped doing that once I gained proper smd soldering skills).
 

Offline linux-works

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #117 on: February 28, 2014, 09:57:48 pm »
time to pick up some solder wick to fix my desoldering station
wait - is that like dividing by zero on a calculator?

2014: the year the soldering machines became self-aware
 

Offline vasonline

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #118 on: March 01, 2014, 09:20:07 am »
Hi,

Linux-works.

Thanks for the reply.
I have made a quick video to show what is happening.
Tried a different 230/120 transformer (a 500VA variac should be way overcapacity) Stiil the same.



I think it's time to notify the dealer?
Thanks for the comments. Hakko in Europe is almost impossible to find. And the UK distributor does not want or is not allowed
to ship to mainland europe.

« Last Edit: March 01, 2014, 09:21:50 am by vasonline »
 

Offline Rasz

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #119 on: March 01, 2014, 10:54:40 am »
its a mating call. its just lonely
Who logs in to gdm? Not I, said the duck.
My fireplace is on fire, but in all the wrong places.
 

Offline linux-works

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #120 on: March 01, 2014, 03:57:42 pm »
"its pining for the fjords!"

(what kind of talk is that?)

lol

does the unit make that sound if you remove the barrel that holds the filter and the used solder?

does it matter if its warmed up and then you apply suction or does it do this only when its cold and on its way to warm up?  if there is a clog in the nozzle (heated end) then you have to wait for it to warm up before it can suck out the debris in there.  have you cleaned the nozzle using that spring wire they supply?
 

Offline vasonline

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #121 on: March 01, 2014, 07:39:42 pm »
Hi raz & linux-works

 :D

Now for the serious part:
Indeed you asked some very good question!

- The sound it makes is the same, with barrel that holds the solder removed.
- I acually popped the cover of the vaccuum compressor: you can actually see the motor slowing down.
- Just to make sure: I put the cleaning wire in...it went trough the nozzle and heater without problem.

Here is one observation I found:
The turning speed of the motor is influenced by the ON/OFF cycles of the heater.
It goes slower each time the heater is ON. And goes faster each time the heater is OFF
- If let the Hakko warm up, form cold, you can actually hear the pulsing of the motor changing.

I had bought 200W step down transformer for it. So just in case, I switched to my 500W variac (autotransformer)
...no change. Both work equally well.
Strange.

Thx for all the help!

Must say: eevblog is one of the most helpfull forums I saw in quite a while.
:)

Greetings.
« Last Edit: March 01, 2014, 07:43:12 pm by vasonline »
 

Offline SeanB

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #122 on: March 02, 2014, 06:50:01 am »
So high resistance in a switch, connector, cable or PCB trace is dropping voltage to the pump.
 

Offline linux-works

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #123 on: March 02, 2014, 08:43:03 am »
also, are you -sure- your ac wall connection can handle the current?  does it do this on all outlets?  are you using a power strip or direct into the wall?

just something to check in case you haven't.  not all home wiring is good ;)
 

Offline vasonline

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Re: EEVblog #542 - ZD985 Desoldering Station
« Reply #124 on: March 03, 2014, 07:17:49 pm »
Hi,

I think we are on something....
I see the transformed voltage dropping to 100V each time the heating element kicks in.

Line voltage 230V keeps stable. Transformed voltage drops.
Maybe I should try a bigger 230/120V transformer?

My variac handles it better, It's rated 2A but still drops quite a bit.

Something like this might work better (300W):
http://www.factoryprices.nl/product/hq-psup37hq-spanningsomvormer-220-110v-300w-144127.html


« Last Edit: March 03, 2014, 07:19:44 pm by vasonline »
 


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