Weller Soldering Station WT Series - Review

The electrical isolation didn't appear to be a problem. The martial bedroom isolation might be

colporteur  wrote:

My wife was shocked to find me pipe clamping the temperature probe on her new stove to a solder tip in order to try and get an accurate readings.

I fail to see how she was shocked in this situation. There should have been clear electrical isolation between the stove and the ..... Oooooooohh. Nevermind.

Thanks for the kind words James. It took me a while to place the name. I have watched some of your Work bench Wednesday content and found it very informative.

I had this grand plan to measure tip temperatures as a objective measurement to balance the subject contributions of the test team. I had hoped to compare what the controls indicated to what is actually happening at the tip. All my efforts failed. My wife was shocked to find me pipe clamping the temperature probe on her new stove to a solder tip in order to try and get an accurate readings.

My inquiry on the temperature gun failure was licking my wounds. The temperature gun looked so nice in the tools catalogue and it was on sale. I am happy to say, the vendor I purchased the temperature gun from was content to refund the $45 purchase.

I definitely agree with part of the sentiment. Before I could afford a proper soldering station, I too lived with direct-to-wall thermally balanced irons. I lived through the frustration, but I learned to gauge the temperature by watching solder melt and I also learned to give it a break when the grip got too hot. The first thing I did was to replace the nasty tip with a Weller tip that fit into the iron ... while this didn't fix its slow response, it did mean that I had a reliable shape of tip to use and made soldering a lot more pleasurable. It can be done without the conveniences of flashy high-end tools - my first multi-layer board repair was with this iron ... it was successful even though a few pads were lifted and bodged.

But sometimes, your perspective can change after using a professional-grade tool for a while. When it makes jobs quicker, improves your chances of success and frees your mind from worry, it becomes a dependable friend. Someone I know once told me that better tools mainly help you achieve better results quicker and more consistently, but if you haven't developed the skill to use that tool effectively, you might never know it. In the past, I lived only with cheap DMMs - but later on, I gained an appreciation for more expensive DMMs because I understood what that meant in terms of accuracy, dependability and safety. I think it's the same thing here - the more you use it and the more complex tasks you undertake with it, the more you might come to appreciate the benefits and differences on a daily basis. Part of it may be a brand loyalty - after all, it feels like a dependable friend that we get used to. I often take a little while to adjust to a different iron, especially since I'm the one trying to fix SMD issues like this by hand (wire is 30AWG Kynar):

That being said, I'm not saying that everyone needs a Weller on their bench ... far from it. But if they are slumming it with a wall-plug unregulated iron, they might be missing out on the fun in soldering ... and getting the wrong impression that it's an exercise in frustration.

- Gough

Great review Sean. I always like RoadTests that make comparisons to other tools. I also appreciated your tidbit about the origins of soldering. That's something I never knew!

Others have already covered the issues on measuring with the IR thermometer. On Workbench Wednesday 20: Thermal Tools for Circuits episode, we included thermocouples and IR thermometers for temperature measurements. One of the examples I showed was a thermocouple measuring my (Weller) soldering iron's tip.

I can also vouch for the Hakko calibrator that Gough mentioned. I am confident the one I have is a knock-off. However, its measurements tend to agree with the thermocouples that I have in the lab.

Here is one note on using either thermocouple type: measure with a small blob of solder on the tip. It'll transfer the heat better for more accurate temperature measurements.

Thanks Gough, and all the other people that responded. I will make my commentary on Gough's post strictly because I am lazy and want to do as little work as possible to consolidate my perspective.

I realize I am walking a fine line challenging the costs in a public forum. Especially in light of the fact, the vendor has provided the product free of charge. I mean no disrespect in exploring the topic but I am troubled. I am still not convinced the costs are justifiable. I can replace a lot of tips on my $40 solder iron with 500 bucks and still be in the game.

I worked in electronic support for 17 years. The 15 tech's had a Weller lamp cord powered solder pencil in their tool boxes and a Pace solder station back at the workshop. During the Pace course it was suggested the price for the station was in the thousands of dollars. The workshop station had a solder sucker and a pencil iron no better or worse than the pencil in my tool box. The solder sucker was a gem compared to the pump action blue plastic sucker. Come to think of it, those blue solder sucker are still around.

If I make the comparison, that a tool like the Weller is akin to a golf club, then I can see my way past trying to convince myself that there is a costs to benefit analysis that supports the purchase. I am not a golfer but I have seen people invest hundreds of dollars in a putter. My weakness is goalie equipment. The expensive gear I think is better. It has more padding and is designed to fit more comfortably. It doesn't make me a better goalie, even though I have used that argument. What it does do is reduce the bruising and is so much more comfortable to wear for three periods of beer league puck shots.

Soldering is a skill that boarders on artistry. Those that are good at it, have developed their skills that in some part may rely on the tool. I believe only a small part of the mastery is the tool. Us solder mortals seek solace in our tools believing they can help us through the rough spots.

The <$15 pencil used as part of this road test, I have had for a few years with success. I put solder to the end of an iron and wait until it melts to determine if the iron is hot enough to work with. If the tip is in good shape I can do a reasonable job. Would I tackle a computer printed circuit board repair with it? I say no. Not because of the tool but because I lack the skill and experience for such work. If a ten second warm-up is important to me, then I would make a requirement to get that in a tool. Trust me when I say, I was really impressed with the performance. If temperature control is a requirement then there are tools that do that. I know this is sacrilege to say but I think the vendors get us to buy into our passion. It is not a golf club or the Kevlar hockey goalie chest protector but it has the same price tag.

The high power high heating speed and controlled temperature feedback makes just a few soldering tips really flexible for development purposes. I like that I can solder 0.5 mm pitch surface mount, most through-hole, and medium-sized connectors, all with a single 1 mm tip, although for production use procedures are well-defined and the pin/pad size would dictate which size tip to use. I'll only swap to a larger tip for the biggest connectors (like 1/4-inch jacks and so on). Plus the ability to swap out tools as needs change. And ease-of-use with more lightweight tools that are almost pen-like in size. Also, as you say, the longer life. Everything seems more reliable.

Basically I like that with modern solder stations, tip life, solder station life, tip cleaning, reliable joints every time, versatility for design engineers, are all solved problems.

Cost is always dependent on the situation of the end user, their needs and where they see value.

The element14 Australia website has the WT 1012 "kit" consisting of the WT1, WSP80 and WSR201 for AU$511.52. For comparison, a Metcal PS-900 is listed at AU$443.29 (which I have but keep in reserve), the Ersa i-CON is AU$875.31 (which I covet and have seen used at a tertiary institution lab, not mine though) and the Tenma hot-air and soldering rework station is listed at AU$305.90 (which I use most of the time). In light of this, I wouldn't say the Weller is cheap, but I wouldn't say the Weller is unreasonably expensive either as it would be considered a proper professional iron much like the Metcal. I suspect there is some premium in the fact it's Weller branded and it has a higher power output, but alas, the market has options for the hobbyists and pro-sumers too.

For the serious hobbyist and professional, considering a high quality soldering station has some key benefits:

• Often the better irons have a good range of different tip shapes and sizes, with good tip availability and the possibility of replacing the iron or heater. This means that any failure isn't going to necessarily mean replacing the whole set-up and usually means the set-up will last longer. It also makes doing heavy and fine work with the one unit a possibility rather than a compromise.
• Better tip platings on the branded stuff means that instead of having tips last only a matter of months, they usually are serviceable for at least a year or two under heavy load. There is peace of mind that the tips can be acquired if necessary.
• The better temperature control makes soldering much easier and reduces the risk of damage from overheating traces or components. Along with this, most temperature-regulated irons have more aggressive power outputs to speed up recovery times and make soldering larger joints almost painless.
• The ergonomic benefits of longer, more flexible cables, ergonomic soldering pencil grips, weight-balanced irons and proper stands reduces the likelihood of being burned or having accidents.
• Proper grounding and reduced risk of mains-induced voltages (e.g. from direct-powered irons) causing damage to ESD sensitive components.

The question I pose to some people looking to buy one of those cheap mains-powered thermally-balanced unregulated irons is this - how long do you figure you're going to be using this iron, and how much are all of the devices you're going to be working with worth? I've used my irons to repair so many power supplies for computer/IT equipment, including multi-layer boards, that using anything cheaper would have probably spoiled the board or at least increased the frustration level and risk. How much is a burn worth, or your time? Often, to shop at the bottom end of the market is to get something that's only good for a real beginner, meaning they would have to pay again to graduate to something more decent. That's why at the minimum, I try to convince hobbyists who ask me about the subject to at least save up enough for a Hakko FX-888D (~AU$197) which is what I'd consider a good entry-level product.

- Gough

colporteur Good on you for calling out the cost question.  I asked it of myself.  The tips on my cheapest iron don't last very long at all.  If I use a lot of flux, they basically rot away.  The slightly more expensive iron has better heat management/recovery.  The only thing that I could think of that might justify the expensive model you actually addressed with the heat-up times.  If I soldered professionally (repair work), I would seriously consider a high quality, fast heating station.  Time is money in that application and it would justify the expense.

Hi Sean,

UK price is £333 GBP + VAT. That's a reasonable price here, if it's a decent solder station. It's in the ballpark for an R&D design engineer, or a serious hobbyist. I had a Weller station as a design engineer - mine was not as nice as this, but equally there were design engineers that had similar priced units.

I don't know about production shop-floor work (not seen much of that for a long time!) - I can't recall what equipment they used.

For home use, I'm sure my older unit cost a similar amount, probably more once I factored in soldering iron tips I didn't use! The soldering station works out to be more cost-effective if you need two irons (or more).. for instance, you can likely get a second iron for your base unit (i.e. with a second stand).

The unit might look like it only supports one iron, but the base station has a socket, it's not permanently wired, so it can be swapped out (not as convenient for production, sure, where they may want a multi-socketed higher power solution with all irons on hot-standby, but I'm strictly speaking from design engineer perspective, or hobbyist).

As an example, I have one base unit (with one socket), and two irons (a thin one and a fat one, so I don't have to keep swapping out tips).

This question is directed to rscasny .

How can a RoadTester know he has met the minimum requirements for a RoadTest? If this knowledge is already posted some where on the site, please let me know. I'm kinda in the dark about a successful RoadTest. I might think it is good and the vendor who participated in the selection thinks it sucks. Ouch.

It is a required practice to reference previous RoadTest in applications. That works only if the RoadTest meets the requirements. Referencing a project that is incomplete or failed is a poor reference in my opinion unless it is supported with documentation.

While coaching youth soccer a number of players approached me asking to use me as a reference for jobs they were applying for. In one case I asked the player did they think it was a good idea to use me as a reference. She felt since I was her coach I had to give her a good reference. I reminded her, she was constantly late to practices in addition to being a difficult player to work with. I was not her favourite coach after suggesting she rethink using me as a reference.

I am not looking for an "ata boy" on RoadTest. I would like to feel confident referencing  a RoadTest in an application knowing it meets requirements. I monitor members comments and respond when appropriate. I suspect the RoadTest coordinator waits for a RoadTest posting and then let's it soak for awhile before sharing it with the vendor. I'm curious about the behind the scenes process.

If an RoadTest comes up short I would definitely want to know about it. I take pride in my work and look for improvements where possible. Retirement affords me the time to put a little extra shine on my boots so to speak.

There is an elephant in the room that no body has commented about. It was discussed at great length with the test team doing the RoadTest.

Looking at three price points low (<$15 CAD), medium ($50CAD and high ($495CAD) would you purchase the unit?

No one in the test group could justify the cost for a personal purchase. I framed the commentary with a positive message. I'm not confident the price point can be justified by someone other than a professional in a career that requires extensive soldering.

I welcome you comments? I hope not to piss off the vendor discussing price but I feel it is an elephant that requires some commentary. Close to $500 buck for an iron is steep.

I was impressed with the warm-up time. I'm curious to discover the times after the unit has been in service for a while.

I know one of the test subjects is going to be putting the unit through it paces in the next few day. He is going to be soldering short pig tail wires to HO model railroad track. He indicates he has about 50 pieces to complete.

I suspect the iron will make the job a little easier in terms of heat capacity and not having to wait for heat recovery. I plan to post any additional comments from his exercise.

Who knew a soldering station could illicit so much fun!

Hi Sean,

I noticed you mentioned a 10-second warm-up, that's impressive. And (to me) it appears that the iron has a decent amount of power and is hopefully responsive. Before the review, it was hard to tell if such times were feasible, because of the way the tips appear to make contact with the rest of the iron (i.e. the flat-ish surface) from photos on the Internet. If it's warming up so fast, clearly this method functions very well!

The price for the kit seems really reasonable in the UK. If I was in the market for a solder station I think I'd seriously consider this one.

Thank you for the kind words.

My goal in any RoadTest review is to provide some content that is enjoyable to members and contains some value, while hopefully meeting the objectives of the committee. While this RT was open for application, I made a post encouraging members to apply especially first timers. I felt the RT didn't require a high level of knowledge or experience like others to make an application. I was pleasantly surprised when my modest approach was selected.

One individual in my test subjects indicated they had only soldered twice before this exercise. Knowing the varied experience, I developed tasks that were not that complex but did explore the tools.

I created four simple tasks

• Solder a wire to a spade lug (i.e. crimp terminal)
• Tin some different gauges of wire.
• Solder 28 pin IC socket to a PCB
• solder 26 ga wires to binding posts/remove 26 ga wire from binding posts
• set the backlight and shutdown timer on the Weller unit (only)

The participants indicated the tasks were basic but in spite of that it enabled them to explore the tools while enjoying themselves. The enjoyment comment may be attributed to them being polite or because they got a free lunch but I suspect not. Some individuals stuck around the shop after we finished to just chat without drinking any of the cold beer available.

My appreciation for taking the time to respond with the details. How things work has always been a fascination for me. Finding someone that is willing to dummy down the details to increase someones ability to understand is always great.

I've copied and pasted your details into a single message, that I will send to the test group. It was a question raised during the group scrum. Again thank you.

I second the kudos on having a team test the different soldering stations.  I was curious to see how road testers would differentiate themselves when there were so many applicants.  Brilliant.  Nice review.

I like the approach of having a team of people with differing soldering experience comparing differently-priced soldering stations. I guess the drawback was that you were limited in the range of soldering tasks you could give them - which might not have demonstrated the Weller's wider capabilities. Sounded like a fun day out!

P.S. To try and get a better alignment, I would use the unit in scan mode by holding down the trigger and slowly waving it back and forth, trying to find the peak reading as you sweep back and forth. You might find it goes above 35C, but I'm not sure you will get the reading you expect. I have a similar unit (unbranded Chinese, yellow/black in the same shape with similar specs, looks the same as Douglas Wong's one), with my Tenma soldering station set at 420C and equilibrated, I'm reading peaks of just 201C at the best alignment - with the heat rising up towards the thermometer causing plastic creaking noises. I suspect again, it's down to geometry, shape of the tip, small area and emissivity ...

- Gough

Emissivity is a factor, as evidenced in the manual. Some better units can have the emissivity value changed in the unit to correct for errors, but your unit is set to 0.95 fixed. As a result, if you measure anything with an emissivity much less, the readings will be underestimated by a significant factor. This can be still useful - e.g. in case of comparisons between the same sort of material - e.g. bearing to bearing, as the absolute temperature may not be necessary to know but some indication of difference is (e.g. one is much hotter than the other). The other reason is that convenience is often a bigger factor than actually getting an accurate reading - just ask anyone that's used a clamp meter, the infrared laser thermometer has similar convenience properties that are good for a quick check but not reliable enough for a definitive absolute number. I've been taught to adhere some tape (e.g. masking tape) onto certain shiny surfaces to control the emissivity to a consistent value for comparing things - but then we get into the issues of thermal conductivity as well.

The laser is emitted from a diode often placed below the actual infrared window. Due to parallax error, at close ranges, not only does the laser spot not align with what is being sampled, but it gives the wrong impression that the sensing spot size is small when it isn't. Yours has a 12:1 spot ratio which is quite common, but I'm not sure how accurate that is at close range because the actual window uses a fresnel lens which may introduce distortions at close range.

That being said, the emissivity of the point that you're measuring the temperature can change - e.g. the shaft of the iron can burn and darken over time, increasing emissivity. Likewise, a shiny tinned tip may not have a high emissivity, but I'm not too sure, as in air the plating will change from metal to oxide fairly rapidly which means emissivity is almost constantly changing. This is an issue with using high-end thermal imaging cameras as well for getting "absolute" temperatures, hence my preference of a purpose-specific thermocouple-based unit for accuracy (although this does put a "load" onto the tip). There may also be an off chance that your particular unit has a quirk (e.g. alignment of the sensor to the sensing window/frensel lens is off by a certain amount).

- Gough