silentflight wrote:WOW. Thanks, Syonyk. I feel like a thorough reading of your posts should qualify me for a certificate of Chinese Spot Welders to hang on my wall. Seriously good stuff.
It really shouldn't. I don't feel that I understand this specific welder at all yet. After I've had a chance to stick a scope on the various power regions, determine how the triac is triggered, determine how the digital settings and the current set knob interact to determine pulse width, and profile the current over time of the varying length pulse widths, I might say I understand this one particular welder decently, though I could still benefit from reverse engineering it (which, sadly, I'm not any good at yet).
I hope you will share a link to your upcoming specific blog post(s) on rebuilding in a new thread in the battery section, no doubt it will be closely read by many on the Sphere. As for you getting the impression that a pack rebuild by a talented person might not be of interest on this forum... well, that's an unintended indictment of what should be the premier DIY ebike forum which we as a community should take to heart, let's get things back on track!
I'll probably get around to linking it, but it's not a multi-kwh Hobby Lipo pack, and I didn't replace a perfectly well designed pack with Hobby Lipos, so... we'll see. I expect an awful lot of "Why did you waste your money doing that?" responses.
This is my first pack rebuild, so we'll see how it compares to others.
mcintyretj- I appreciate your post as well. It highlights the dire need for a safe and reliable spot welder at a reasonable price and has Macgyver written all over it.
Alternately, it indicates that a safe and reliable spot welder should cost more. I would happily have paid more for a better unit than my 788+ if there was anything between $200 and $2k...