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Old 11-12-2012, 09:41 PM   #466
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I'm not a specialist but I heard somewhere that braking causes a sudden increase in voltage sent back to the battery. So would imagine using a low braking profile? Just supposing really
You are correct, it's called Back EMF. But all speed controllers are designed to control this voltage spike. This would not cause the issue being discussed.

The sensor board circuit issue is purely abuse of the ESC. Make sure your ESC is properly attached to the chassis of your car and does not come loose.

Those of you that don't work in the electronic industry of no clue how much abuse above the norm RC electronics take. It's surprising they last as long as they due.
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Old 11-13-2012, 09:31 AM   #467
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Ok, I do not understand why this problem with the Tekin not working with the new D3.5 is only happening with the new D3.5 and not other motors? One racer at our track took out the D3.5 that was showing the bad sensor symptoms and put in a different motor and it worked fine. What is different in the D3.5 sensor board to cause this?

Also I replaced the sensor board in my D3.5 with an older one and it works fine. So is it the Tekin or is it the D3.5s sensor board that has changed?
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Old 11-13-2012, 10:30 AM   #468
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keep in mind there is nothing special about the sensor boards in the D3.5. They are the exact same sensor pack/PCB that the previous D3, Speed Passion, and other motors from the same mfg all use. They even have the same part number on them!
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Old 11-13-2012, 10:39 AM   #469
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What causes the voltage spike in most cases? Reason I ask is if everything in the car is running at ~ 4.2v (for 1S) setup, and 6v if there is a booster/pack feeing the ESC via the Rx connection. Just curious what is considered a spike and how to avoid that with my RS's ?
Most of it's from crashing and super hard board taps where the servo is under an immense load.

A receiver cap can help buffer the system but it won't prevent it outright.
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Old 11-13-2012, 10:41 AM   #470
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Originally Posted by BCbud View Post
Ok, I do not understand why this problem with the Tekin not working with the new D3.5 is only happening with the new D3.5 and not other motors? One racer at our track took out the D3.5 that was showing the bad sensor symptoms and put in a different motor and it worked fine. What is different in the D3.5 sensor board to cause this?

Also I replaced the sensor board in my D3.5 with an older one and it works fine. So is it the Tekin or is it the D3.5s sensor board that has changed?
Most of the hall sensors we're all using are rated at 5v. However some work all the way down to 3v and even lower at times. So it really depends on the sensors used.

The D3.5 isn't the only motor that will do this, others do as well including our own.
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Old 11-13-2012, 11:42 AM   #471
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looking for a good starting point FDR, running the new D3.5 17.5 Turn MAXZILLA motor in blinky and in boosted on a 70'x50' Carpet Track
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Old 11-13-2012, 12:28 PM   #472
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I ran sunday the italian indoor championship, in 13,5 no timing category.
I use fdr 4.1 and timing 40.
In a corner exit was very good but the straight was slowly...
The temperature are 80/90 celsius...
Some advice?
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Old 11-13-2012, 12:48 PM   #473
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looking for a good starting point FDR, running the new D3.5 17.5 Turn MAGZILLA motor in blinky and in boosted on a 70'x50' Carpet Track
Somewhere between 3.5 and 4.0 FDR for blinky. I'd probably start around 3.8 on a track that size.

Personally, I wouldn't use one of these for boosted. Not with the 12.5 high torque rotor in it anyway. Change to an RPM rotor and start around 6.5 FDR, with plenty of boost + turbo.
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Old 11-13-2012, 03:05 PM   #474
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ive had no problems with my tekin and d3.5 17.5 only thing i changed was im using the sensor lead from the reedy as i like how they sit flat
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Old 11-13-2012, 05:42 PM   #475
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for 17.5 blinky i used 4.25 fdr
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Old 11-13-2012, 06:37 PM   #476
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Default D3.5 stock rotor?

Anybody know what rotor comes with the normal D3.5?

Also, which direction does one turn the end bell to increase timing?

Thanks!!
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Old 11-13-2012, 07:54 PM   #477
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Originally Posted by mhavlena View Post
Anybody know what rotor comes with the normal D3.5?

Also, which direction does one turn the end bell to increase timing?

Thanks!!
Turning end bell counter clockwise increases timing. Don't know about the rotor.
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Old 11-13-2012, 08:39 PM   #478
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Originally Posted by mhavlena View Post
Anybody know what rotor comes with the normal D3.5?

Also, which direction does one turn the end bell to increase timing?

Thanks!!
They come with the purple 12.3mm broad power rotor.
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Old 11-14-2012, 12:55 AM   #479
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Anyone had some advice for more straight speed in 13,5 no timing?
I use fdr 4,1 and timing 40 (80/90 celsius)
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Old 11-14-2012, 05:51 AM   #480
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I'm looking for a good starting point for rollout for my 13.5. The track is 80 x 42. Here is what I'm running:

WGT 13.5 blinky
13.5 D3.5
single cell
Tekin RS
80 x 42 carpet track

Any help would be greatly appreciated. Thanks!
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