Havoc 3s GEARING & Adjustable parameters
#55-1733P-1 Ver. 2 |
4-2010 |
ATTENTION: Correct gearing is essential to getting proper performance from your brushless motor system!
PROPER GEAR SELECTION
Motor operating temperature is the ONLY way to properly set the vehicle gearing
The motor should be 160-175°F MAX at end of run!
Change the gearing to avoid overheating.
Do not Free Rev or operate without load!
General Gearing for 2 & 3-cell Li-Po or 6 & 9-Cell Ni-MH Use:
These recommendations are for sport or entry level setups. Stock radio equipment and sport “stick-type” battery packs should work safely. These gearing range
recommendations are intended to provide initial safe operation.
BRUSHLESS MOTORS |
PINION GEAR |
PINION GEAR |
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w/ 2S |
w/ 3S |
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Ballistic 8.5 (#3608) / SS8.5 Pro (#3408) |
15 – 20-tooth |
10 – 15-tooth |
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Ballistic 10.5 (#3610) / SS10.5 Pro (#3410) |
17 – 22-tooth |
12 – 17-tooth |
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Ballistic 13.5 (#3613) / SS13.5 Pro (#3413) |
20 – 27-tooth |
15 – 22-tooth |
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Ballistic 17.5 (#3617) / SS17.5 Pro (#3417) |
25 – 30-tooth |
20 – 25-tooth |
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Ballistic 21.5 (#3621) / SS21.5 Pro (#3421) |
28 – 33-tooth |
23 – 28-tooth |
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The Havoc 3S’s included fan is required when using a 3S Li-Po battery pack.
Decrease the pinion tooth number by 2-3 for motors without sintered rotors.
If you do not change gearing after switching to brushless, you will be over-geared and will have slow acceleration & excessive temperatures!
With the broad brushless power band, you can go 1-2 teeth higher pinion than listed above for more top speed, but remember going higher will produce excessive ESC & motor heating. Check the motor’s operating temperature after making any gearing adjustments- -motors are designed to operate from 160ºF-175ºF. If you do overheat your ESC and motor, be sure to allow it to cool for several hours and install a smaller pinion gear.
For RTR kits:
Most car kits include a pinion gear that is generally sized for mild motors and is fairly large. To be safe, replace the installed pinion gear with one that is about 3 to 5-teeth smaller. Most stock spur gears are safe to use.
For TRAXXAS® SLASH™:
With a Novak 8.5-turn brushless motor installed, the RTR kit’s included 18-tooth and 23-tooth pinion gears will provide speeds above 40 mph with various battery packs. For more specific speed run information and tips to reaching higher speeds, please visit the Novak Web site.
THROTTLE
PROFILES
NOTE: The Havoc 3S has the ability to run on either two or three-cell Li-Po batteries via Novak’s auto detect software. When Li-Po circuitry is active
(see programming on reverse side to turn ON/OFF), it automatically switches to the proper Li-Po cut-off voltage for the battery packs you connect.
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BRUSHLESS PROFILE |
BRUSH-MODE |
|
1 |
2 |
w/Reverse |
on |
on |
Reverse% |
100% |
100% |
Programmable |
yes |
yes |
Minimum Brake% |
0% |
0% |
Drag Brake |
off |
off |
Dead Band% |
6% |
6% |
Minimum Drive% |
1% |
1% |
Throttle Curve |
expo |
linear |
Brake Frequency |
4 kHz |
3 kHz fixed |
Motor Rotation |
CCW Q |
N/A |
Li-Po Cut-Off |
on |
on |
The Havoc 3S ESC reverts back to default settings when One-Touch set-up is performed.
The Havoc 3S ESC is fully programmable, refer to page 6 for fine-tuning options.
Throttle
curve
SELECTION
|
100% |
Throttle Curve Graph |
Motor Output |
|
0 |
Linear
Expo
Trigger Position |
100% |
Novak’s Throttle Curve adjustment allows drivers to tailor the throttle response of a vehicle, creating either a quick burst of power with the Linear Curve setting, or a smoother, controlled low-end power delivery with the Expo Curve setting.
Setting is fixed at “Linear” in Brush Mode. The Throttle Curve is selectable in Brushless Mode.
LI
- PO DETECT & CUTOFF
This ESC is compatible with 2-3S Li-Po or 4-9 Ni-MH cells. Novak’s exclusive Smart-Stop Li-Po Cut-Off Circuitry is built-in and when active (see programming on reverse side to turn ON/OFF), it automatically switches to the proper
Li-Po cut-off voltage for the battery packs you connect.
ESC’s factory default is ON for Li-Po Cut-Off Circuitry
This circuitry lets you safely use 2S or 3S Lithium Polymer battery packs by cutting off the speed control’s throttle output when a critical safety voltage is reached (6.25V for 2S and 9.375V for 3S).
The circuitry constantly monitors the pack voltage. When it gets close to the critical safety voltage it begins interrupting, or “blipping,” the throttle output as an early warning that the battery’s voltage is getting low and the
throttle output will soon be completely shut off.
When the critical voltage is reached, the throttle output to the motor gets completely shut down to keep the voltage from dropping further (Red & Green
LEDs will alternately flash & you still have steering control).
Re-charge battery after Smart-Stop circuitry shuts off throttle.
Even though the pack’s voltage will rise (after a short resting period) to a level high enough to run the motor again, this is not good for Li-Po batteries.
Reaching the critical safety voltage too many times can damage the cells.
DO NOT CONTINUE TO RUN VEHICLE AFTER THE LI-PO CUT-OFF HAS SHUT DOWN THE THROTTLE OUTPUT FOR THE FIRST TIME.
During power-up when the ESC is switched ON, the Amber & Red LEDs will flash together 2 times for 2S or 3 times for 3S packs to indicate Li-Po Cut-Off is ACTIVE.
With the Li-Po Cut-Off turned ON & using Ni-Cd or Ni-MH cells, the circuitry will shut off the ESC’s throttle output, due to the different characteristics of these batteries. To deactivate software, see page 6.
MOTOR ROTATION SELECTION
The Havoc 3S software lets you reverse a brushless motor’s rotation direction (see reverse side of this sheet to select rotation). This allows installation in vehicles with counter-rotating drive trains (or opposed transmissions), without compromising performance. Because the ESC will be operating in its normal forward & reverse modes, features like Smart Braking continue to operate normally.
www.teamnovak.com
*At the time of printing, the Traxxas® Slash™ RTR kit included an 18-tooth and a 23-tooth pinion gear.
Slash™ is a registered trademark of Traxxas®.
P5
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