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Electronics tech Anything to do with the electronics in a model. Lights, Radio, ESC, Servo, Basic electrical. |
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some excavator questions... esc,bec, radio and battery
soo... i blew up 3 esc`s for my escavator (4200xl v1),
also think i may have damaged 2 more, but they work... for now. i had a light swich short out, that burned 3 of them to death... then during some testing i accidently hooked up a shorted out servo, heard some sounds i didnt like and there was an electrical smell, but the pump motor esc and my last turn motor esc are working now after i hooked up a bec for power supply and pulled the red wires from the esc`s. 1. i want to get the sabertooth esc, and im planning on some other upgrades, but for now i gotta make some other priorities... so i was looking for a cheaper alternative, just to get the tracks running. im clueless when it comes to electro motors and esc`s, so i have been looking around and found a few that i thought might work... https://hobbyking.com/en_us/quicrun-...5-brushed.html http://www.rcmart.com/1040-brushed-c...?cPath=1560_51 https://hobbyking.com/en_us/hobbywin...-for-1-10.html http://www.rcmart.com/tritronic-wate...?cPath=1560_51 they range from 25a to 60a... the rc4wd replacement is 40a(i think), but no way these motors draw 40a? my pump motor a robbe 5055-45 has a 50a esc... but from reading the manual a 30a esc is recomended. the sabertooths i think are 25a. so the motor are drawing these amps? not the esc feeding them? right? anyways... does any of these esc look usable for trackmotors? or does anyone have a suggestion for a cheap alternative? 2. after some searching i figured out that when having 4 esc`s hooked up to the receiver its not good to have them all power it... and after me hooking up the shorted out servo, the pump and turn motor esc`s wouldnt work right until i hooked up the bec. this is the rc4wd yellow bec that came with the 4 valve upgrade kit. i hooked red and black to the battery, and got 5 volts for the receiver... works fine, but it also has a white wire, what is this for? did i hook this up right? after searching i couldnt find any other bec`s with 3 wires...? 3. the transmitter i have is the fly sky th9x... that came with the excavator in aux channels i have channel 5 as pit trim(the pot on the front) i use this to control pump motor. channel 6 as hov pit (left lever) for track 1 channel 7 as hov throttle (right lever) for track 2 i used to have the pump motor revving up sometimes when i used the tracks, i finally figured out why... if i take the left lever down then release it, then take the right lever up then release it channel 5 will changer rpm on motor...??? this is also visible in the display menu, when i only have the radio powered that channel 5 will change when i do this... (but only if i have it set to pit trim) to set it back to normal i can repeat the same movements or pull the left lever down twice. this seems oddly specific to be some interference causing it, but i been through the settings on the radio and i cant figure out if this is a setting, even in a fresh profile it will do this, but only with these channels and selections. anyone else have this happen? is it supposed to do this? 4. this is probably a stupid question... but im tired of burning my electronics. i bought some lipo batteries i planned on using for my transmitters, but they are 25c and have really thick wires... the old one i used have thin wires and is just 1c... could the 25c ones burn my transmitter? sorry about the long post, but this stuff is confusing me... Last edited by schmoking; 06-22-2018 at 07:14 PM. |
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