new esc is causing glitching

[betty.k]

i recently dropped a mtronics digi sport max esc (reverse, brake, no motor limit) in my rs4 rally and the voltage drop on take off is so massive it s starving the rx. this means if i accelerate hard at a distance greater than 10m it glitches madly.
i m thinking i need a big capacitor on the battery terminals but i m unsure what voltage or value i need. i tried a 16v 1000uf cap and it seemed to help a little but not enough.

so what s going on? i m only running a 19t motor so there s no real pressure on the esc, right?:8ball:

[PandaBear]

Futaba RX should usually be pretty tolerant… blackeye:

Toss out the big cap on the powerleads, it don’t do nothing for your issue.

Instead you should get an extra servo lead (or the red plug from your 4-cell battery box) and wire that to the capacitor instead; plug that “stutter-stopper cap” into the BATT slot in the RX.

[betty.k]

aha!! i had a sneaking suspicion that might be the case. and you’re right, the cap on the batt leads does nuthin for me!
so am i right in assuming i should go for a 25v cap (approx 3 x 7.2v)? 1000uf a good start?:8ball:

[FALCON-LORD]

Can’t you drop a separate Batt pack on your RX and servo? this isolates the voltage for the receiver from the Motor, and should alleviate the issue.

[betty.k]

that would work but i’m saving that as an absolute last resort. i really don’t want to find room for another bulky batt pack in an electric car:8ball:

[mini-g]

try thwe caps, also untie your wiring from the top plate, worth a try.

BIG DAVE

[PandaBear]

Anti-stutter cap can be anything from a 10V 680uF & up. Probably can’t buy anything less than 16V or 25V these days.

Might want to make sure you’ve got 3 filter caps on your motor too, just need 103 or 103 ceramics or tagtams.

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