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Old Sep 30, 2002, 01:41 PM
Registered User
Ft. Collins, Colorado
Joined Aug 2002
48 Posts
Hard start versus soft start electric motors

I have just installed a Mega 30/4 with a 2/1 planetary gearbox on a Rascal 40 conversion. I am using a Jeti/Hacker 30 Optical ESC. The prop. is an APC 16x12 electric. When I advance the throttle, I get a really sudden "hard start" on the motor, with a loud "clack." It runs fine, but I worry about damage to the gear box or motor from the hard start. I have tried lowering the trim for the throttle on the transmitter, and I have also put in 50% negative exponential on the throttle, but nothing seems to prevent the sudden and loud "hard start." Anybody have any ideas? Do I have a unique problem or is this something to be expected? Maybe I shouldn't worry about it, but I am accustomed to quiet, gradual "soft starts" on several other (smaller) controller/motor/gear systems.
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Old Sep 30, 2002, 01:57 PM
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Zebulon, NC
Joined Aug 2000
5,086 Posts
So you have the Jeti/Hacker master controller? If so you need to change the timing on it for the mega motor, they come set for Hacker motors as default. that may be your problem.
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Old Sep 30, 2002, 04:55 PM
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Ft. Collins, Colorado
Joined Aug 2002
48 Posts
Change timing for Mega motor

Hi Cue -

Thanks for the suggestion. I did set the timing for a Mega motor, but your suggestion makes me think I should recheck it --- just to make sure I picked the correct beep-tone sequence.
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