A better mod to improve the ZD915 Desolder-Station
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- Опубліковано 28 лют 2018
- Acting the vacuum valve with a simple delay-circuit makes a better modification to improve the sucking action.
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Comparable stations: ZD-915, ZD-985, ZD-8925
Combined solder/desolder stations: ZD-917, ZD-987, ZD-8917
Search terms for the valve on Ebay: "electric solenoid valve"
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I think the unit works just fine as designed. My biggest beef with it is the length of time it takes to warm up from cold, so to have it ‘always ready’ you have to have it on all the time, and this results in the piece of composite that the element screws to crumbling away after not too many months. I have replaced my handset for this reason twice since I have had it. I have it in mind to see if zi can figure a way to control the temperature with a single input so that I can sense when the handset is in its holder, and reduce the temperature to an ‘idle’ so that it will pick up to useable temperature when the handset is picked up
With the right maintenance it works well even without modifications.
No, it doesn´t. Try to suck a small through-plated hole with a wire from a thick component in it. You will never ever suck this cleanly out.
It looks like there is enough space for a small vacuum reservoir in the case. I gonna try and combine your vacuum reservoir idea and my delay circuit idea and fit it all neatly inside the case. That is, once I have some time to get around messing with my ZD915.
A better way would be to build the vacuum valve into the handle, directly activated by the trigger and have the compressor/pump only running when needed, controlled by a suction sensor in a small vacuum reservoir. That way the you have the best of both worlds.
great video! what is the inner size of the tube? will 6mm OD connectors work?
Nice, a demo would be great
You can believe me, if I say that it´s a better mod. For a 1:1 comparison I would need 2 desolder-stations, 2 identical PCBs each with a dozen solder junctions to compare. Impossible. In a few weeks I will upload a video with the best desolder station I evre used. Just wait for it...
@@KainkaLabs Thanks for your reply, a comparison is not needed, but at least get a feel for the delay. The mod makes perfect sense to me, no doubt about it, great job!
I personally would go for a mechanical valve instead of the trigger switch and a small reservoir inside of the main unit with a pressure sensor which powers on the pump. Good job, though!
I wanted to see it work!
Will be in a future video about desoldering tools & practices for SMD and Through-hole components.
If Im not mistaken, the Hakko 470 uses this exact principle, except the solenoid valve is inside the case, where the tube attaches.
I noticed the same thing my pump blows instead of sucking I have a quick question did you reverse the negative and the positive to reverse the airflow so I could suck would that fix the issue of the not sucking but blowing issue? If anybody can help me answer please thank you
Or try running the vacuum pump at its rated 24v instead of 18V.
Personally, I wouldnt mess up a good looking working design this way, but hey, have fun.
I’d like to make a foot pedal operated version of this for my Aoyue soldering/desoldering station. There is a newer version with a stronger DC pump but mine is the older version with the more robust AC pump. It is also used as a fume extractor which means I can set it to run constantly. I am hung up on the vacuum valve part. What do I search for? When I search eBay I get a bunch of car parts that look nothing like your small, rectangular, valve with blade terminals. Is there a name for this type?
You don´t have to search for "vacuum valve" but instead e.g. for "electric solenoid valve"
KainkaLabs Thank you!
@@KainkaLabs I cheated to do this manually by pulling the trigger while kinking the hose for a few seconds, then I straighten or kink the hose to trigger the suction when desired. Of course, it requires two hands but it works well. I still want to do the foot pedal and trigger the solenoid just to free up a hand. Thanks!
@@KainkaLabs You know, I just realized that my Aoyue ain’t 701A++ station’s integrated fume extractor feature will charge the vacuum… so no foot switch is needed. I think this will be a very simple modification (just the trigger-actuated solenoid). :)
That's great but why put the valve contraption on the gun? It would be much more neat tucked away inside the enclosure...
Also, perhaps a potentiometer to adjust the maximum delay so as to protect the pump would be advisable? Some people for some applications might not actually need a delay at all.
I wonder how much vacuum it takes to work properly.
Wearing out the pump motor is probably not s problem, but wearing out the diaphragms certainly is. I had to replace mine after a couple of years, and just try sourcing them.
Hy
Can this fix also be appied on proskit desoldering station?
My station is not sucking properly
It looks like it´s the same. Mot vacuum desoldering stations seem to come from the same Chinese manufacturer.
If you replace the bad 18-to-12V-Resistor-bord with a DC step-down converter, also the suction power increase.
Will this station satisfactorily desolder lead free soldering?
There is no difference between leaded and leadfree desoldering except for the +20°C higher melting temperature.
The most important for any desoldernig work is that apply flux before desoldering.
Hi
Please put a link to the vacuum valve
I have no link. I found it easily on EBay.
Reinventam apa calda?
If you mean "aqua calde" your comment would at least orthographically make sense if this shall be in Latin :-)
presumably it's romanian: translate.google.com/#auto/en/Reinventam%20apa%20calda
I like your mod though :)
Not everything that has been invented before is freely documented or available at reasonable price.
now if there was a mod to make this more quiet... the pump is so damn loud...
Ich hab die gleiche Station, und die Ventilplatten (einfach nur 1mm Silikon Platte) waren verhärtet. Es macht sinn diese zu ersätzen.
Too big reservoir. For desoldering 10 pads you have to vacuum all the capacity. The gun originally works without it. The main problem with this gun is a vacuum leak between tin chamber and desoldering pipe.
Where shall this leak be? The tin-chamber is connceted with a rubber-seal to the desoldering pipe.
You almost need to put the vacuum on a demand system similar to how compressors work so that you always have the vacuum ready. There's not that much air that needs to pass into the desoldering tip. What if you could use some sort of sealed bag with a weight hanging on it or something (bellows) and then just lift it back up every now and then. Silence. Every now and then you just hear a small fart sound. Ha, sorry, but what if you could fix someone's desoldering gun so it sounded like it ripped one off every time you pulled the trigger. God I'm a sick puppy.