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Old May 11, 2005, 03:28 PM
sharkman
San Diego, Calif.
Joined Jul 2004
153 Posts
hard start vs soft start...??

Can someone please explain the difference between a hard start and a soft start? I'm somewhat new to RC flying and have only been doing this for a little over a year. I'm trying to figure out why my Tsunami 30A ESC only runs in contest mode.

thanks,
sharkman.
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Old May 11, 2005, 03:45 PM
How do I land this thing?
BigShark's Avatar
Joined Jul 2002
448 Posts
I don't know that ESC, but a hard start is fine for direct drive. Soft start will power up the motor more slowly to avoid damaging a gearbox.
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Old May 11, 2005, 04:14 PM
Registered User
North East England UK
Joined Jan 2003
1,432 Posts
Quote:
Originally Posted by BigShark
I don't know that ESC, but a hard start is fine for direct drive. Soft start will power up the motor more slowly to avoid damaging a gearbox.

It will also be 'kinder' to your battery packs too......The initial power on is like a dead short across a battery pack so a soft start will be a gradual increase in load current........Its a bit like a Direct On Line(DOL) start for an industrial 3 phase motor...star/delta starters were considered soft start...

@Sharkman.....you should be able to change the esc settings...Have you got the instructions? If they appear confusing( they are not the best written...) p'rhaps we can help?
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Old May 12, 2005, 06:15 PM
sharkman
San Diego, Calif.
Joined Jul 2004
153 Posts
Hi Chippie,

Thanks. Yes, I do have instructions. I've been following them as best I can. My only issue right now is with getting the throttle to work after I program the ESC. That's why I want to understand the difference between a hard start and a soft start. So far, I've only been able to get the throttle to respond in mode 4 (contest mode).

I want to run the ESC in lipo mode (mode 5) since I'm using lipos, but I can't get the throttle to run the motor after I get it into mode 5. I've also tried mode 2 (motor mode) with the same results. According to the instructions, I'm in mode five because after connecting the battery with the transmitter on, I get the first beep, followed by the number of beeps for the number of lipos I programmed the ESC for, followed by the arming beep sequence. In the other modes, there are no beeps for the number of lipos programmed.

When I increase the throttle, nothing happens. What I'm not sure of and I don't see it in the instructions anywhere is what else I need to do to set the throttle after I have set the ESC to mode 5. The instructions tell me after I move the throttle to full for the number of lipos I'm using to disconnect the battery.

There is a mode 3 (heli) which the instructions mention requires a neutral setting for the throttle. I'm wondering if I am getting stuck in a neutral state somehow or if the throttle off position is getting stored backwards when I set it for mode 5. I guess I am a bit confused.

thanks,
sharkman.
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