nomo81 said:
I was looking for someone who maybe has this combination (PAS+CA3/2+VESC) in practical use on an ebike/pedelec
and if i where able to specifi the communication specs between these parts in depth i presumably will be able to answer my own questions
there are no communication specs, becuase the ca3 does not communicate with anything.
all it does is take various sensor inputs (ebrake, battery voltage, current shunt, throttle, pas, temperature, etc) and process them all based on settings you choose in the various menus to then calculate a throttle voltage (or pulse width) to send to whatever controller you connect that throttle output to.
i don't know if anyone has used multiple vescs and controlled their throttle inputs from a ca3. it might take some forum searching on posts with vesc in them (of which there are a lot) to find out. :/ probably a lot of reading, if you haven't already done it.
don't know if it is worth the time or not.
do you already have parts you are trying to get to work together?
if so, then to get help with them you must post--
-- what they are
--how you are connecting them
--what *actually* happens when you try to use them
--what you *want* to happen that is different from that
--etc
and then we can help you figure out what to do to make that happen.
Is there an PAS which works with an CA 3 out of the box?
Doesn´t matter if an bottom bracket unit (messuring step up power) or just such an hall sensor magnet field attachment "thing" (just on/off when magents are passing by)
yes. basically all of them.
see the ebikes.ca info page for the ca3 for details.
any pulse-based pedal cadence "pas" sensor with 24 magnets at most will direclty work with the ca3, just by setting the ca3 pas sensor menu settings to whatever matches it.
most if not all of the torque sensors can also be used, as long as you setup the ca3 menus for it appropriatley to it's specs, and calibrate it on your bike. several are already preset, just pick from menu.
there are various interacting settings in the ca3, some of them in rather complex ways, so before you even start setting one up, you should go to the ebikes.ca info page for the ca3 and read everything, including hte linked manuals and setup guides, and then go step by step thru te instructions, not skipping *any* steps, to be sure that you set every single setting to something compatible with the way you want it to work.
if you instead choose to just pick some things to setup and ingnore others, evne if you think you're not using htem, the system may not behave as you expect.
fwiw, i'm using the ca to read just the cadence sensor part of a torque sensing tdcm bb right now, to control two motors via independent controllers on the sb cruiser trike's rear wheels. i culd just use any old pas cadence sensor to do it too. there is also a regular throttle for startups, since the trike is too heavy for me to always get started on pedals alone, but the pas controls everything after i startup from a stop. then there is an ebrake input to the ca to shutoff output when i brake and to cause the controllers to engage regen braking. the throttle signal out from the ca goes to both controllers in parallel, so they get the same signal to do the same thing with each motor.