4200 Excavator problems

[Rimrock]

There is nothing special about the original servos for the xl4200, they are one of the most common used sizes out there and the cheapest ones the fabricator was able to pick up in a 'Shanghai roadside sales stand a Monday morning'...who knows Just a matter of finding the same size when replacing one, TowerHobbies, ebay and so on.
When were're at it..if needing to replace a ESC in the future...The original speed regulators on the 4200 are way oversized, and draws more 'standby/idle power' and gives more 'waste heat' during operation than necessary, like 1 Amp + total. The (oversized) pump motor is the largest motor on-board, and draws up to in the neighbourhood of 10A in this set-up. The fabricator have chosen a 150A ESC...In an airplane one would take out 50 Amps + from the same motor, so one would need a big regulator there for sure..The ESC for the track and swivel is rated at like 160A (!!) but the motors draws in the neighbourhood of up to 2-3 Amps each..All these original regulators are cheap though, but one could have used other cheap smaller ones in order to get the battery last longer.

[Rimrock]

Originally Posted by Rimrock

There is nothing special about the original servos for the xl4200, they are one of the most common used sizes out there and the cheapest ones the fabricator was able to pick up in a 'Shanghai roadside sales stand a Monday morning'...who knows Just a matter of finding the same size when replacing one, TowerHobbies, ebay and so on.
When were're at it..if needing to replace a ESC in the future...The original speed regulators on the 4200 are way oversized, and draws more 'standby/idle power' and gives more 'waste heat' during operation than necessary, like 1 Amp + total. The (oversized) pump motor is the largest motor on-board, and draws up to in the neighbourhood of 10A in this set-up. The fabricator have chosen a 150A ESC...In an airplane one would take out 50 Amps + from the same motor, so one would need a big regulator there for sure..The ESC for the track and swivel is rated at like 160A (!!) but the motors draws in the neighbourhood of up to 2-3 Amps each..All these original regulators are cheap though, but one could have used other cheap smaller ones in order to get the battery last longer.

Must adjust my numbers a bit; newest versions has 125A for the pump motor and 50A continuous, probably over 100A temporary, for the other motors..) Anyway, you got my point