Categories
Repairs

Soldering

I attempted to repair a dashcam with a dying battery this weekend. The dashcam is a Nextbase 402g model which mostly works very well and has done for many years. The only problem with it seems to be the battery as it is not user replaceable. When it inevitably fails, it requires soldering skills to remove and replace it.

The dashcam was purchased about 5 years ago and this was the second time I have changed the battery. I remember purchasing the first replacement battery via eBay (that’s not a typo, it’s officially a small ‘e’ and capital ‘B’) and it took several weeks to arrive from China, which was annoying. This time I used Amazon and it arrived the next day with Amazon Prime, which I only signed up to for the Premiere League football matches over the Christmas holidays but it has proved useful for the quick delivery when buying presents.

The process of replacing the battery is documented in several places online including some very helpful YouTube videos, so I won’t go into it here. The purpose of this blog is to have a small rant about the whole soldering process. I’m not great with a soldering iron, I’ve actually only used one a small number of times. It’s a skill which I’m sure I could improve upon with practice, but it’s incredibly fiddly. I had to solder very small wires from the battery to the circuit board. In my mind the minimum requirement for the job is a soldering iron, a soldering iron holder, some solder and three hands. My main problem is… I don’t have a soldering iron holder!

I did eventually complete the task and the dashcam is working well. I know I’ll end up doing it again in a couple of years but I might be a soldering expert by then! These days the price of dashcam’s are a fraction of the cost I paid back in 2015, but I’m a little bit old school and the make do and mend mentality is making a comeback. So if you have a broken device that needs replacing, have a go at repairing it first, you might just surprise yourself.

Categories
Cycling Repairs

Bottom Brackets

I ride an old Halfords Apollo Mogul bicycle to commute to work. The bike is about 10 years old, and it had hardly been used for the first 8 years of it’s life, but a change of work location made cycling an ideal form of transport for me.

I had a spate of punctures a couple of months ago, it felt like I was replacing or repairing the inner tubes about once a week. The original tyres were getting baldy in places, so I bought some cheap Rolson tyres from Argos, and the punctures stopped immediately. I should have replaced them much sooner! The only other repair I had ever done was to replace the rear brake pads. I’ve not had much luck with those as I have never been able to get the v-brake pads to meet the rim at the same time. I have tinkered with the brake cable and tension screws and the results are that I either ride with one pad touching the wheel rim and slowing it down, or worse still, the brakes not slowing the bike at all. Luckily, the front brake on this bike is a Zoom disc brake which does a decent job of slowing the bike down by itself.

At the weekend I attempted to fix the wobbly pedal issue that had gotten worse. The wobble is actually pedal ‘axle’ which I now know to be called the bottom bracket. I watched a couple of YouTube videos to see how to replace this. I was very surprised to find there are a large number of different standards and sizes of bottom bracket. I was not able to find which one I had, so I decided to remove mine and find a replacement that will fit.

I had recently purchased an Icetoolz bicycle maintenance kit from eBay. I used their Click and Collect service and had it delivered to my local Argos, which is very useful as it isn’t always possible to stay home and wait for a delivery. I used the crank removal tool to remove the crank (the pedal arm), which was straight forward. I then had the bottom bracket to remove, but I needed a tool I didn’t have, and I didn’t even know what the tool is called. A google search eventually found I needed an Adjustable Cup wrench (spanner) and I purchased a suitable tool, an Unior 1672/2, from Amazon. I took advantage of the Amazon Prime trial to get free next day delivery (on a Sunday!) and added additional items including brake pads, bike grease, a new bottom bracket, and a bike stand to help with the repairs.

The bottom bracket I bought is a Shimano UN55. They come in various sizes, I had to measure the width of the part of the bike frame it sits in, and also the width of the spindles which the crank arms attach to. The available dimensions of the bottom brackets vary by only a couple of millimeters, and I found it hard to take precise measurements when the bracket was on the bike, but I settled on measurements of 68mm and 120mm. The available sizes are 68mm or 73mm, and various other measurements for the spindles with the closest being 118mm or 122.5mm. I opted for 122.5mm as I thought it would be better to be slightly too wide, than too short.

When the packages arrived, I set about using my new Adjustable Cup spanner to remove the existing Bottom Bracket (BB). This proved to be extremely tough and took an additional pair of hands to hit the end of the tool with a hammer as I held it in place. It eventually loosened enough to unscrew from the frame, and once it was off, I found it was extremely rusty with broken ball bearing cages and loose ball bearings. I cleaned the frame as much as I could using a cloth and some WD40, then inserted the new Shimano BB. This was also tough to screw in due to the rust, but with some bike grease, and the correct BB tool (for Hollowtech II BB) from my Icetoolz kit, I secured the BB into the frame. I had issues with putting the cranks back on, they didn’t seem to fit as far into the square tapered spindles as they did on the old BB. They seem tight enough, but there is a noticeable gap between the cranks and the frame which is much bigger than the 2.5mm I was expecting. I used the bike to commute with today, and pedaling was a much smoother experience. The additional gap didn’t affect my pedaling, but I will need to adjust the derailleur to access all of the gears. I will do this next weekend, along with fixing the brakes. All these jobs will be much easier now I have the impressive bike stand, the Ultrasport Bike Stand Expert. I will write another blog next week with an update on my progress.

Categories
Introduction

New Year, New Blog

I have just created my first WordPress blog. I’ve only ever used Blogger in the past, so this is a new experience for me.

This site is uploaded on 1&1 (now 1&1 IONOS). 1&1 has it’s own WordPress section, and I did try it, but having read about WordPress, I decided to manually install, upload, and set up the blog. It was fairly straightforward to do. I haven’t yet decided on a style, I’m currently using the default template, but I will experiment with it as I go along.

I intend to use this blog to talk about whatever is on my mind that I want to publish to the world. The blog is anonymous (Contrived isn’t my name), but that is just because I’m a private person. Don’t expect anything outrageous on these pages!