Of all the skills I can teach about assembling the TouchDRO, soldering is probably where I am the weakest. So I’m going to start there. There’s a method to the madness. Sometimes when someone is new at a skill they are can actually do a better job teaching it because the learning is fresh in their mind. Ever have a master try and teach you something and all they can say is “just do it, it’s not that difficult” because it is just too easy for them?

Anyway, here goes, soldering tips from a somewhat decent solderer.

Starting with the basics, you probably want to buy a “soldering station” as opposed to just a soldering iron. The advantages of a soldering station are mainly that it includes a stand to rest the soldering iron in when you are not using it and the temperature can be adjusted. It’s the latter that is the most important, but the former is very useful too. I’ve got the Weller WLC100, you’ll find it online anywhere from $35 to $55. It is adjustable from 5 to 40 watts and has interchangeable tips.

You can buy much higher cost soldering stations with more features, some that let you set the exact temperature of the tip but for this job I think the Weller does just fine. You could do it with a cheaper one as well but for the money I think that the WLC100 makes the job easier. Here’s two sources to buy one online:

MCM Electronics
Amazon

You’ll notice that Amazon is significantly cheaper, however, MCM is convenient because they have all the replacement tips indexed. You’ll need to buy at lease one replacement tip for the soldering iron and it’s pretty difficult to make sure you are buying the right one on Amazon.

If you are in the Eugene, OR area (where I am). You should probably just drop by Oregon Electronics as you can get everything you need in one trip. I’m not sure if they carry the Weller but they have something that looks similar and is actually cheaper …. plus it comes with spare tips. Speaking of spare tips, for soldering to the circuit board your going to need something other than the chisel or screwdriver tip that most soldering irons come with. With the Weller I have above, I’ve used both the ST1 and the ST7 and both work but I think I prefer the ST1 because it gets things up to temperature faster.

Now that you have your soldering station worked out you are going to need a tip tinner/cleaner. Most soldering stations will come with a sponge to clean the tip of the soldering iron. I was never successful using one as it cooled the iron down too much and the temperature fluctuations, I believe, caused the tips too wear out prematurely. Since I switched over to a tip tinner/cleaner I haven’t worn out a tip. Lastly there are two other little tools that will make things easier on you. A third hand tool and heat sink clips. You’ll see in the following post  how handy these can be.

That is going to be it for this post. I’m trying to keep this brief and only give you the information you need. If you want more information, there is a ton of it on the web. The Maker community is super active out there and soldering is one of the fundamental skills of making things. Do some searches and see what you find. In the next post I’ll have some pictures and videos of exactly how I did the soldering on the TouchDRO quadrature board.

I’ve been trolling the web looking for free resources for training manufacturing concepts. I’ve found a lot of really good stuff, more than I expected really. There are a number of “YouTube machinists” out there taking their time and energy to pass on their hard earned tips which is a really great thing and very useful for people who have the time and inclination to watch and learn. I’ve also found a some videos prepared at various schools. You can see what I’ve come up with in the links table below. Seems most of these videos hover around the 30+ minute mark for a few reasons.

• They cover a wide variety of topics, including viewer feedback, tool reviews and commentary.
• They show lengthy segments of chips being made
• The video is of a class lecture which, due to the environment, must be paced so that they entire class can keep up in the lecture environment, with many pauses to allow student’s to process the material

I have absolutely no problem with any of these formats and they all have their place. I myself have learned a lot from the likes of Abom79, Joe Pi and others. I enjoy their personalities and banter. What I’m trying to do with Ironpunk, however, is different. I’d like to keep the topics focused so that the videos can be short and to the point. Arbitrarily, I’ve set the limit at 10-13 minutes as a feasible amount of time. Rather than make the videos slow paced or repeat concepts to reinforce a point, I’ll rely on the viewer to pause the video as necessary and/or replay the video to understand the concepts or techniques. A good example of the format I like is the Hass Tip of the Day.

Somehow when I started this project I didn’t think I would be doing as much web development as I have been doing. It’s my nature, though. I am highly process oriented. If I have to do something multiple times I want to put in the work to make things go as efficiently as possible. It’s why, in my shop, I often find myself spending more time making the tooling and fixturing to get a job done than it takes to actually do the job. I get satisfaction in having things go smoothly and efficiently. Few things frustrate me more than having to repeatedly do something in an inefficient manner just to “get it done”.

When I started working on this site, I decided it would be a small modification to the site I had already developed for myself http://site.teryk.com. As it turns out I ended up making a bunch of changes to add to it’s readability and maintainability. It’s hard to see the changes as my own site has kept pace. In reality they are both served from the same WordPress instance and it serves out ironpunk.org or teryk.com based on the URL it is reached by. Eventually my hope is that the IronPunk site will need to scale up to it’s own server but for now this is the cheap solution. It isn’t the fastest server but it will have to do for now.

The latest addition to the site is the dynamically generated tables that display the IronPunk parts list and the list of Online Resource Links. The nice thing about the way these are implemented is that it allows the user to interact with the data and, because of the way that the data is stored, it can be reused in different ways and maintained easily. I won’t bore you with the details in this post. If you are interested however, you can check out this post over in the Details section. I’ve used a lot of opensource code in creating this site and that post gives credit where credit is due.

One of the first hurdles to getting the TouchDRO hooked up was buying all the connectors, terminals and wiring I needed. There aren’t many stores that sell these type of connectors, certainly nowhere in Eugene I assumed (more on that later). I started searching for good sites on the web and found the following along with many others:

• http://www.digikey.com/ – wide selection, expensive in small quantities and you really need to know what you are looking for.
• https://www.adafruit.com/ – kind of Arduino and kit specific. Sometimes hard to tell whether what they sell will work with other devices, user friendly however
• https://www.sparkfun.com/ – like Adafruit, better for kits and gadgets rather than individual connectors.
• http://www.mcmelectronics.com/ – Super wide selection and good prices. Good customer support, can actually talk to people on the phone. Confusing website with pictures and descriptions that don’t always match the item.

I ended up buying most of my parts from MCM Electronics and it was quite the learning experience. It took 4 orders and $32 in shipping expenses to get what I needed. That’s the problem with having to buy things that you can’t hold in your hands to see if it fits and does what you expect it to do. As I wrote in the list above, their website is confusing and misleading. The pictures often don’t match the item they are displayed with and neither do the descriptions.  After my 2nd order they sent me a catalog which made things incredibly easier. I would suggest calling them up and requesting a catalog right off the bat if you are planning on ordering from them as it will likely save you time and shipping costs in the long run. I’ll post a complete parts list in the resources section of what I bought from them which should also make things easier.

A funny thing happened after all my ordering and re-ordering from MCM. I was soldering some connectors and realized I didn’t have the right size shrink fit tubing. I rode out to Home Depot to get what I needed and came across Shangri-La, otherwise known an Oregon Electronics. I have a hard time understanding how with all my web searches I did not find this place. It is right at Conger and 11th and I believe that they have everything I needed. Not only that they have knowledgeable staff to answer questions and everything is right there to touch and feel. The prices seem comparable to MCM and probably cheaper once you figure in shipping with the small quantities I was ordering (and re-ordering 🙂 . I’ll post a parts list for Oregon Electronics for anybody close enough to drop in. They have a website but I haven’t  spent much time on it. One of the things I am quite excited about is that they have a selection of tips for soldering irons. I’ve always had a difficult time finding tips in the style I want that fit my soldering iron. I am going to take it down there so I can test fit them and get what I need.