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Futaba MC 9100A ESC

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Old 09-10-2012, 09:52 PM
  #51
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Default RE: Futaba MC 9100A ESC


Quote:
ORIGINAL: cmoulder

I will also have to adapt my approach to stall turn pivots and leave in a click of throttle, and/or adjust the brake ramp to slow perhaps. Throttle curve will need some tweaking, for sure. Immediately after a flight the unit was cool to the touch, so no stress there!

I keep enough throttle that allows the plane to come to a stop but still blows a bunch of air over the rudder. It is more than a couple of clicks.

Jim O
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Old 09-17-2012, 04:31 AM
  #52
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Default RE: Futaba MC 9100A ESC

Got a chance yesterday to work on this and start to get a feel for how much throttle is needed. As you stated, Jim, a bit more than a couple clicks, however not much with my throttle curve as is. Nice that it is more predictable this way, and leaving a little power in after the stall gets it started cleanly on the downline with no tail waggle.

Finally I am happy with downline braking with the OS brake @ 75% and with the best prop thus far for my set-up, a Mejzlik 20.5x12WE which Chris finally has in stock now at F3AU. Very wide blade, significantly more so than the PT's and also a bit heavier @ 87 grams.
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Old 09-17-2012, 10:20 AM
  #53
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Default RE: Futaba MC 9100A ESC

Anyone tried the braking with a Hi-Max 210 type outrunner ? More braking without the noise would be great.

Is this ESC suited for this type outrunner.
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Old 09-17-2012, 10:40 AM
  #54
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Default RE: Futaba MC 9100A ESC

It should work fine with the Himax.

Very smooth throttle up from idle (brake) to full power with nary a hint of a squeal.
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Old 09-17-2012, 01:29 PM
  #55
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Default RE: Futaba MC 9100A ESC

Quote:
Anyone tried the braking with a Hi-Max 210 type outrunner ? More braking without the noise would be great.

Is this ESC suited for this type outrunner.
I have used this esc with the himax 210 , no problem had up to I think about 65 % brake that is more than the 30% I could get on the CC Ice not only in % but in brake , no problem with this
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Old 10-05-2012, 06:51 AM
  #56
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Default RE: Futaba MC 9100A ESC

How are you mounting/securing the OS ESC? Thanks.
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Old 10-05-2012, 04:15 PM
  #57
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Default RE: Futaba MC 9100A ESC

I made a little pedestal from a balsa block, roughly 1" x 1.5", with a slot through the base of the pedestal through which a zip tie can be threaded. A patch of Velcro on the top of the pedestal and a patch on the ESC, cinch down with a zip tie, and it isn't going anywhere. The nice thing about the balsa pedestal is that it is easy to sand the base so that the contour matches that of the foreward part of the fuse where it is glued with CA or epoxy. If you want to make it look more "hi-tech" just color it black with a Magic Marker.
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Old 10-18-2012, 06:11 PM
  #58
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Default RE: Futaba MC 9100A ESC

A new question . . . is anyone running this ESC with an in-runner/gearbox combo? I did the initial setups for a Hacker C50XL COMP . . 2 pole in-runner with a 6.7:1 gear ration. The OS instructions say 0 to 10 degrees for an in-runner. How do you determine the best final number? Thanks.
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Old 10-19-2012, 05:05 AM
  #59
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Default RE: Futaba MC 9100A ESC

Well, I got the answer (thanks Verne and Andrew), it is 3 degrees. I finally did find a statement in the Hacker catalog that is should be 0-5 degrees, but thanks to the trials and lessons of guys like Jason, Andrew, and Verne, the best number is 3 degrees. Now on to startup and brake settings!
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Old 10-20-2012, 07:26 AM
  #60
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Default RE: Futaba MC 9100A ESC

Start-up I used normal and brake I was using 35% on my Shark (C-50 14XL). Seems the inrunner doesn't need the same brake as the outrunners (85%), or it could be the difference in planes too.
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Old 10-20-2012, 10:43 AM
  #61
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Default RE: Futaba MC 9100A ESC

Great information, thanks.
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Old 11-05-2012, 08:41 PM
  #62
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Default RE: Futaba MC 9100A ESC

Need some help from veteran F3a pilots.  I connected the Q80 28 poles (old version) with the new MC9100A under the below setting, but it just don't work out for my ground test.  When I hit the throttle to mid range, glitching sound happened for a few seconds.  Then I keep on hitting up the throttle to about 80%, glittching sound happened again and the RPM started to drop substantially.

Please let me know what should I try on the setting to resolve this sympton ?

ESC:
Battery Type: LiPo
Cutoff voltage: Auto
Battery cutoff type: Soft
Advanced Timing: 25º
Accelerations: Normal ( try high and even highest )
Start Power: Lowest
Air Brake: On, 65%
Motor Pole No: 28
Gear Ratio: 1.0:1

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Old 11-05-2012, 08:48 PM
  #63
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Default RE: Futaba MC 9100A ESC



Also, I should further clarified that my Q80 is working in excellent condition, it is because when I connect back my Jeti spin 99 right after the ground test, it just fly like angel.  My prop. size is 21x13.5 and I am using good health hyperion 2 x 5s 5,000mah battery.  I have pre-learned the throttle end point so as using the programmer to do all my setting and sucessfully downloaded ( saved ) the parameters to the ESC.

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Old 11-06-2012, 12:55 PM
  #64
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Default RE: Futaba MC 9100A ESC

I would make sure all of your solder joints are solid.
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Old 11-06-2012, 08:12 PM
  #65
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Default RE: Futaba MC 9100A ESC

Thanks for your advise, I have double checked all the joints.  My joints were soldered by " Goot "  pure silver soldering material to enhance conductivity.
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Old 11-06-2012, 08:16 PM
  #66
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Default RE: Futaba MC 9100A ESC

Will it be the switching frequency not well matching with the motor?  Q80 recommends 8kHZ but the default output of MC9100A is 32kHZ?
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Old 11-07-2012, 03:33 AM
  #67
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Default RE: Futaba MC 9100A ESC

I noticed the same thing . .. the switching frequency is not adjustable and is fixed at 32khz. The controller works fine with my Hacker C50 Comp in-runner, and Hacker recommends 8khz for it also.
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Old 11-08-2012, 08:38 PM
  #68
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Default RE: Futaba MC 9100A ESC

Is it possibly an automatically adjusting frequency up to 32khz? I tried looking for the manual online but still can't find one. You think it would be out by now.
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Old 11-08-2012, 11:55 PM
  #69
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Default RE: Futaba MC 9100A ESC

Quote:
ORIGINAL: gaRCfield

Is it possibly an automatically adjusting frequency up to 32khz? I tried looking for the manual online but still can't find one. You think it would be out by now.
The manual is posted in #15. The frequency is fixed at 32 kHz. If you down load the pictures I have uploaded it’s easier to read.


Regards,
Henning
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Old 11-10-2012, 12:58 PM
  #70
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Default RE: Futaba MC 9100A ESC

A question to you guys.

With only about 3" for the battery wires, has anyone had problem reaching the battery?

I am putting one on a Mystic with A60-7S, and the other one on Abbra with C50-14XL

Anyone has good settings for the ESC for any two of above motors?

Thanks,

Ihncheol
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Old 11-10-2012, 11:02 PM
  #71
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Default RE: Futaba MC 9100A ESC

Thanks Henning.

I had PWM and timing mixed up - the PWM affects mostly the controller and not the motor - usually we use lower PWM's with controllers to save excess heat in the controller. This one must be designed well enough to handle it and thus doesn't have a PWM setting. Higher PWM should not have a negative effect on the motor.
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Old 11-11-2012, 08:37 PM
  #72
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Default RE: Futaba MC 9100A ESC


Quote:
ORIGINAL: gaRCfield

Thanks Henning.

I had PWM and timing mixed up - the PWM affects mostly the controller and not the motor - usually we use lower PWM's with controllers to save excess heat in the controller. This one must be designed well enough to handle it and thus doesn't have a PWM setting. Higher PWM should not have a negative effect on the motor.
No problem at all with the Pletty Advance.

Really diggin' a brake that actually works!

I miss the CC log data but it almost doesn't matter because the unit (OS version) is working so well and the model really needs a seriously good brake.
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Old 02-05-2013, 04:28 AM
  #73
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Default RE: Futaba MC 9100A ESC

How do you set up the brake with this ESC? I have the OS version, the programming box would only show 3 settings: slow, normal, and fast. It would not show any % but stops at fast (or slow if I push the arrow button to the other side!) It is in "AIR" type, everything else works normal. I had some issues in the first flight because I didn't program the end points so the ESC would not start the motor, but a quick max throttle / min throttle action solved it. Still cannot get the brake to work....
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Old 02-05-2013, 09:12 AM
  #74
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Default RE: Futaba MC 9100A ESC

When you get to the "Fastest" setting push the "+" key again, it will move to the % readings, change it to what you want and then load the new settings into the ESC. I'm using 65% brake on the Pletty in my Abbra. Seems about right.
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Old 02-05-2013, 09:53 AM
  #75
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Default RE: Futaba MC 9100A ESC

A question.

For fixed end points, can you program through the programmer?

Not sure how this is done by looking at the manual several weeks ago.
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