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Dopo il video in cui parlavo sul perché la tua ebike consumi così tanto, ecco una guida su come impostare il Bosch CX5 affinché abbia più autonomia.
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Mahle x20 aggiornamento
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<blockquote data-quote="blackvipergts" data-source="post: 560113" data-attributes="member: 7667"><p>Sempre dal medesimo Forum US ...</p><p>Quote<</p><p>...a little more troubleshooting here (talking to myself!), using a longer gradual climb (15 minutes, around 600' climbed at a fairly steady 3-4%, no stops)</p><p></p><p>i figured out why the mahle data points are so ... irregularly spaced in the downloaded json files. it records a data point every time the bike moves a certain distance, not a certain interval of time. if you're going fast, this means a data point every 2-3 seconds... and if you're stopped, it means......... none. so a very slow hill climb will have data points only every 6-10 seconds!</p><p></p><p>simple work in g sheets to cross reference the timestamps in the mahle json to the timestamps in the tcx file from my preferred cycling app. data smoothed to 3 seconds since the mahle data isn't that granular and power meter data is spiky. you can see clearly here where i switched from eco to sport (about 40% in) and then from sport to turbo (about halfway) and then back out. the assist ratio is the green line, which varies from around 80% in eco (quite steady) to over 200% in sport. at the highest power leves the assist ratio isn't as steady since we're maxing out the potential assist of the x20 at this speed.</p><p></p><p>the difference between the x20 reading of rider power and the 4iiii power meter remains significant - 20% lower than actual. will be very interesting to see what happens when i replace the bottom bracket sensors.</p><p></p><p><img src="https://forums.electricbikereview.com/attachments/mahleprecisionagain-jpg.205719/" alt="mahleprecisionagain.jpg" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>to troubleshoot, i figured i'd compare cadence between the two sensors. they match, basically, wich small variations due to sampling rate. this isn't surprising since it's pretty easy to count how many times a magnet goes around, or how many times an accelerometer flips upside down <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite105" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p><img src="https://forums.electricbikereview.com/attachments/mahlecadence-jpg.205720/" alt="mahlecadence.jpg" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="blackvipergts, post: 560113, member: 7667"] Sempre dal medesimo Forum US ... Quote< ...a little more troubleshooting here (talking to myself!), using a longer gradual climb (15 minutes, around 600' climbed at a fairly steady 3-4%, no stops) i figured out why the mahle data points are so ... irregularly spaced in the downloaded json files. it records a data point every time the bike moves a certain distance, not a certain interval of time. if you're going fast, this means a data point every 2-3 seconds... and if you're stopped, it means......... none. so a very slow hill climb will have data points only every 6-10 seconds! simple work in g sheets to cross reference the timestamps in the mahle json to the timestamps in the tcx file from my preferred cycling app. data smoothed to 3 seconds since the mahle data isn't that granular and power meter data is spiky. you can see clearly here where i switched from eco to sport (about 40% in) and then from sport to turbo (about halfway) and then back out. the assist ratio is the green line, which varies from around 80% in eco (quite steady) to over 200% in sport. at the highest power leves the assist ratio isn't as steady since we're maxing out the potential assist of the x20 at this speed. the difference between the x20 reading of rider power and the 4iiii power meter remains significant - 20% lower than actual. will be very interesting to see what happens when i replace the bottom bracket sensors. [IMG alt="mahleprecisionagain.jpg"]https://forums.electricbikereview.com/attachments/mahleprecisionagain-jpg.205719/[/IMG] to troubleshoot, i figured i'd compare cadence between the two sensors. they match, basically, wich small variations due to sampling rate. this isn't surprising since it's pretty easy to count how many times a magnet goes around, or how many times an accelerometer flips upside down :) [IMG alt="mahlecadence.jpg"]https://forums.electricbikereview.com/attachments/mahlecadence-jpg.205720/[/IMG] [/QUOTE]
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