Voltara ESCs are configurable through the Voltara Configurator, utilizing the Flight Controller’s ESC Passthrough router.
On selected FC’s like KISS-ULTRA, there is a CRFS protocol that can be used directly from your flight controller — This brings the possibility of changing the settings from inside the FC’s OSD
Motor Behavior #
Direction #
- Options: Normal, Reversed
- Default: Normal
Reverses the motor rotation. Set this to match your frame and prop convention. Most flight controllers also let you reverse direction directly from the Motors tab (using Dshot Commands).
Bidirectional / 3D Mode #
Enables bidirectional throttle control — center stick is zero throttle, stick above center spins the motor forward, and the stick below center spins it in reverse. Used for 3D flight (inverted/upright transitions). Requires your flight controller to be set to 3D mode as well.
Startup Power #
- Options: Low, Medium, High
- Default: Medium
Controls the intensity of the ESC’s initial spin-up force used to tune if the motor has trouble starting, especially for rare cases.
Slow Start #
- Options: No, Yes
- Default: Yes
A soft/slow sinusoidal RPM ramp during the very first spin-up after arming. Leave on for most setups.
Brake on Stop #
- Options: Off, On
- Default: On
With On, the motor is held electrically still at zero throttle, so props stop quickly after disarm. With Off, the motor freewheels.
Almost every FPV quad wants On. Use OFF for specialty setups, such as big prop quadcopters, gliders, or certain fixed-wing applications.
Ramp Up #
- Range: 0 to 100%
- Default: 100%
How quickly the ESC changes the motor electrical RPM after an acceleration command from the flight controller. 100% = as fast as possible (essentially instant). Lower values gentle the response.
- 100% — sharpest, most connected feel(recommended for 5″)
- 99–70% — softer feel, similar to other ESCs
- Below 50% — noticeably mushy — not recommended for racing or freestyle
Ramp Down #
- Range: 0 to 100%
- Default: 100%
How quickly the ESC changes the motor electrical RPM after a deceleration command. 100% = essentially instant braking.
Voltara can deliver very fast braking, which is great for control, but can occasionally create too much regen current spikes that can be detrimental on some setups.
Tip: If your quad oscillates with the default ramp, the most common cause is FC PID tuning being too aggressive — Voltara Gen2 FW on Default Ramps passes FC commands through faithfully, so PID issues are visible rather than hidden, especially on powerful motors. Tune the FC first; reduce the Ramp as a secondary measure.
Ramp values can mess with the PID tune. For general FPV use cases, values of 80-100 are acceptable. Lower values should be used for very large motors/prop combinations to minimize gear stress.
90-100 (1-11ms): ideal range for racing/freestyle/cinematic
80-89 (16-22ms): flyable but soft, hides FC tune issues
50-79 (26-71ms): very soft, FC might hunt on hard maneuvers
0-49 (76-100ms): only for fixed-wing/large-multirotor steady flight
MS values refer to the 0-100% throttle rpm changes. Voltara Gen2 FW features no throttle curves, providing a more consistent response.
Protections #
Current Limit #
- Range: 5A to the ESC’s maximum rating
- Default: Matches your ESC’s rating (80 A on 70A, 60 A on Mini 50A)
The point at which the ESC starts gradually reducing power to protect the hardware. Voltara uses a soft limit — power ramps down, never cuts off abruptly.
Use this only if you are running demanding motors and if you want an additional safety margin.
Temperature Limit #
- Range: 50 to 120 °C
- Default: 100 °C
Temperature threshold for thermal rollback. Power is gradually reduced once the ESC approaches this temperature. Lower values for hot climates or tight mounting; the default is appropriate for most setups.
Stuck-Rotor Protection #
- Options: On, Off
- Default: On
Detects a blocked or seized motor at arming and refuses to keep applying power after a set time. Prevents burning out motors with jammed props, bent bells, or foreign objects in bearings. Leave on.
Audio #
Beep Volume #
- Options: Low, Medium, High
- Default: High
Loudness of all ESC sounds. Keep at High for outdoor flying so the lost-model beacon is audible across a field.
Tip: Higher volume levels also draw more current, so be advised that some “smoke-stoppers” will be triggered on specific motors.
Beep Mode #
- Options: All, Errors only, Off
- Default: All
Which type of notification sounds are allowed:
- All — startup tones, protocol confirmation, errors, warnings
- Errors only — only error-related sounds
- Off — fully silent except the lost-model beacon
Lost-Model Beacon #
- Range: Off, 1 to 10 minutes
- Default: Off
How long does the ESC wait after a motor disarm(needs to have been armed once) before starting a loud repeating SOS beacon? Helps you locate a crashed model in tall grass or woods.
Advanced #
PWM Frequency #
- Options: Auto, 24 kHz, 32 kHz, 48 kHz, 64 kHz
- Default: Auto
The PWM switching frequency used to drive the motor. Auto adapts this based on motor RPM — higher at high RPM for smoothness, lower at low RPM for efficiency.
Leave on Auto unless you have a specific reason (noise troubleshooting, efficiency, torque, etc.) Fixed frequencies are there for advanced users who know what they want.
Timing Advance #
- Options: Auto, 8-30 (degrees)
- Default: Auto
How far ahead of the ideal each commutation fires. Leave this on Auto — it adapts to your throttle automatically and works for almost every motor.
Manual timing is there when you need it, for special use cases.
Wrong timing typically shows up as heat, lost top-end power, or rarely a desync.
Getting Started #
Connect your flight controller to your computer, open the Voltara Configurator, connect & enter passtrough, and you will see every connected ESC along with its settings. Changes apply instantly and save permanently.
If you are unsure what a setting does, leave it on the default. Voltara Gen2 FW ships with defaults tuned for typical 5-inch freestyle and racing setups — the settings above are there to refine, not to “fix.”
