Let me introduce Fliess (Fließ auf Deutsch).
It can do what it was made for - riding fast, hard and long.
Below is a short story in pictures of creating Fliess1 and then evolution to Fliess2. The order is more or less chronological, so the actual result is at the very bottom. Fliess3 doesn’t necessarily have 3 motors.
got a really good motor with crappy bearings though
trying to fit different size aluminium enclosures and still believing that it was a brilliant idea to do so
41x accus and each perfectly 3.53V
at the end very decent remote/receiver with minimum failures (of course, only after making sure that soldering is ok and antenna is properly placed)
flex bamboo deck makes it more difficult to come up with a good enclosure, but it’s worth it
I compare everything with my Evolve, since with it I learned how things should and, even more important, should not be
another batch of things came meanwhile from HobbyKing
go for Turnigy silicone wires if you want a good ones
I did even believe that suspended aluminium enclosure makes sense and ordered custom springs
of course, I wanted to try both - chained and belted
minor but still important things
finally VESC from Enertion arrived. I didn’t even have to finish soldering. The PCB itself survived then numerous DRV/MOSFET re-solderings and still is in a good shape
1st ride without motor. Only accus to see how aluminium enclose works on flex
it’s bent after few jumps, but generally was better than expected
only ~300km of relatively easy ride Parts have been replaced for free by Evolve, but the lesson is learnt - I need a self-made beast
quickly made a spare part on the same evening to still be able to commute at work on the next morning
the most dangerous cutting I ever had Only by luck, the cut part ended up in a wall, 10cm from the window
looked very reliable, but as learnt later with its significant drawbacks
first version of welding station
I was always unhappy about too many wires even on a single setup
motor was finally spinning!
and 43kmh seemed so much!
I rode it in days and nights!
I was sure I would never switch to belts
some other stuff comes meanwhile
even useless wattmeter haha
now I can ride together with my wife and learn a left side
sure I needed to check if windings are accurate and be ready to replace bearings
not that easy to do without proper tools, but I was happy about result
got an epoxy to protect the motor windings and make it a bit quieter (doesn’t really help)
good new bearings
playing with NaOH
crazy little monsters if used properly
do I really need so much?
dreaming about dual experience
getting rid of "too many wires"
welder v2 - 35V + thyristor
some evenings have been spent on building tools, rather than board itself
having fun with KiCad and prototyping
only god knows, why I still believed in aluminium…
eyes breaking parts
even proper tape was better than aluminium
time to understand motors theory and lowering KV afterwards
only 10gr less than originally - could have been worse as a first experience
still fighting against FOC instability
one more tool on a working table
finally the best combination found. Time to repeat success on 2nd motor
honestly, I didn’t even think that I would need to touch the motors as well…
randomly bought ABS turned out to be moldable many times without loosing its properties
it seemed to be a brilliant idea at the beginning. What could be better to test FOC on critical loads without risking your life? Luckily I noticed a smell and smoke from the Evolve motor before it fried
still trying to perfectly reflect the shape of a deck
after Fliess1 I understood that my setup is at least 10s5p
could not wait to try dual
can only recommend pcbway.com
not the best shape ever, but serves a purpose. Not the best plastic neither, but good draft material before Kydex or so
I would get crazy soldering it all, if I didn’t have some experience before on even smaller things
I hope I am not the only one thinking that soldering chips is an easiest part
does anyone know in Frankfurt a hill where I can overheat mosfets? Maybe I just need to take some more weight…
no more wires! Hurray! Exactly what I wanted
never thought that stickers could make such a difference I’m going to leave it as is. I don’t event need that black boring Kydex anymore
less than 1kg of difference in weight but dual, twice a range, almost twice a speed. Anyone wants to buy my Evolve?
ahh! What I did?! I cut the wrong wires on perfectly working motors!
slightly lifting up
of course, the previous idea about individual motor connectors was shit, especially for performance board, where everything must be reliable and well protected
I don’t have any failures for quite a while, but still it is useful sometimes to have a quick access to settings
still looking for 70kmh+ volunteers. I am kidding of course. Everybody wants to live
The new drop down deck arrived already! Time to build Fliess3 and master sliding!