Wheazel wrote:Early in the thread you provide a spec of parts and talk about the complicated controller setup.
How complicated is it really? Possible to manage by reading manuals and having basic electric and engineering knowledge or does it require some hardcore electronics knowledge?
Are you referring to this:
Luke wrote:If you were going to make a mass production EV, I could see using a Sevcon, the hardware is fantastic. For little 1-off projects, it's gotta be the most PITA firmware to setup on the planet. We built the hubmotor bike, put a Methods controller on it, and BAM! 5 minutes later, we are ripping around on the bike (until I smoked the motor on the dyno lol). Methods controller never had any faults, never cared about anything, it just worked, and worked killer. The stupid Sevcon has like 40 pages of settings to go through before it will even TRY to make a motor turn... and then it's going to fault for the next 2000 times you try to use it, until every little useless detail is adjusted to be perfect... It's just a retarded controller, I hate it, but it's what I've got, and it will do a good job once it's all setup right (hopefully).
Wheazel wrote:Performance wise it seems to be a good controller for an amateur built electric motorbike.
Luke wrote:You don't need to worry yourself a bit about blowing up a sevcon. They have fault detection for everything under the sun that you can possibly imagine a controller can fault for an protect itself.
The trick to tuning and setting up a sevcon is getting it NOT to fault for all the riding situations you want to do. With a huge amount of work, this can be done for reasonable motors (it's not going to be able to run a colossus or something).
Having the ability to program them is absolutely critical.
Luke wrote:It's a Sevcon gen4 controller with over $100,000 in development labor coming up with the programming for it to match our motors and bikes in a flawless way with no faults or interrupts or hic-ups. You can inch forward just 1mm at a time if you want with no difficulty, or blast forward if you pin it.
At $200 per hour thats 500 hours for an expert!
Luke wrote:Yes, that would be a blessing if somebody made a sevcon / motor firmware settings collection page. Yet, get this, they change the firmware pretty regularly, and then all your previous files can't load onto them... And you can't roll-back firmware versions...