ZTW 85A Skyhawk Series RC Helicopter User Manual

Series ESC User Manual

85A Skyhawk Series RC Helicopter

Thank you for purchasing Brushless Electronic Speed Controller (ESC). We strongly recommend reading this manual carefully before using this product for the sake of safety.
have no control over the use, installation, or maintenance of this product, no liability may be assumed for any damages or losses resulting from the use of the product. We do not assume responsibility for any losses caused by unauthorized modifications to our product. Besides, we have the right to modify our product design, appearance, features and usage requirements without notification.

Important Warnings

• Always place safety as priority when you use the product.
• Anelectric motor that is connection with battery pack and ESC may start unexpectedly and cause serious danger. Always treat a powered system with respect.
• Always remove the propeller or disengage the pinion gear before the battery connected if you need to working on a plane or helicopter at short range.
• Please observe all local laws regarding the flying of remote control aircraft.
• Never fly over or near crowds.

Key Features

1. Adopting high performance 32 bit microprocessor with a running frequency of 170MHz, supported much stronger computing ability and faster running speed.
2. Adopting new generation craft on the MOSFET, low heat generation, large instantly withstand current, and high reliability.
3. Self-check function: after the ESC powered on, it will automatically check if have the power short circuit ,;motor lose phase, throttle is not at zero position problem, and voltage range.
4. The special ESC case design and the unique fan guard structure greatly enhance the ESC heat dissipation performance.
5. Equipped with the helicopter speed-control function, the speed sensitivity is adjustable and easy to operate.
6. The ESC has a separate programming interface to connect with LCD programming card or Bluetooth module for programming.
7. Supporting data returning function: current, voltage, temperature, RPM, throttle and ESC status code.
8. Bluetooth module supported, change the parameter settings, software upgrading, data recording and the operation can be completed via the mobile phone (Apple and Android) APP.
9. Multiple protections: abnormal power-on voltage protection, start up protection, temperature protection,throttle signal loss protection, over load protection,low voltage protection, over current protection

Product Specifications

Type| PN#Model| Cont. Current Burst Current| Input Voltage| Weight(g)| BEC Output| Size(mm)| Programming Way
---|---|---|---|---|---|---|---
85A SBEC| 4085211| 85A/130A| 3-65 Lipo| 90| 6V,7.4V,8.4V adjustable /10A| 71*36″33mm| LCD Program Card G2/Android&lOS APP

Remark: The ESC weight and size spec. include fan.
Wires Connection

1. Throttte signal wire (Black,Red, White): Plug into the receiver throttle channel, the white wire is transmitter the throttle signal, the red wire and black wire is the BEC voltage output wire and ground wire.
2. RPM signal wire (Yellow):Plug into the speed input channel.

Throttle Calibration

Turn on your transmitter and when fully initiated, move the throttle stick to the highest position (ensure throttle trim is neutral first). Connect your flight battery to the ESC and wait for about 2 seconds.
The motor will make two short beeps, lower the throttle stick to the lowest position as soon as you hear these two beeps. Motor will now beep a number of times (one beep for every cell in your flight battery) followed by a longer “Beep—–Beep”.
This indicates that the throttle for your ESC is now calibrated and ready to use.

Normal Startup Procedure

Turn on the transmitter, move the throttle stick to the bottom position. Connect the battery pack to the ESC and wait for about 2 seconds.
The motor will beep several sounds, sounds time presents the amount of battery cells.
When the motor emits “Beep—Beep”, means self-test is finished, the ESC is ready to work.

Parameter setting and the way to check the ESC real time data

The ESC parameters can be programmed to meet different flight needs.
The ESC real time data like current voltage,ESC temperature, throttle, and ESC status code can be checked by LCD program card or Mobile phone APP.

1. Using LCD program card to set the ESC parameters (need to purchase LCD program card separately)
   A. Wire connection diagramB: Operating steps
   1. Connect the ESC to LCD program card and battery correctly base on above wire connection diagram.
   (the LCD program card connecting wire:Red wire corresponds to the “+” and Black wire correspond to the “-” position, pay attention to the “+” “-” lettering on the LCD and ESC)
   2. After connected well, LCD program card turns on and will go to the real time data interface first.
   (Real time data includes: voltage/current/throttle/RPM/temperature and so on}
   3. Then press “ ITEM” or “QK” button, it goes to the parameters setting interface.
   (In parameters setting interface, press“ ITEM ” to change the programmable items, press” ” or“ ” button to choose the item parameters, and press “OK” to save settings.)
   4. After set the new ESC parameters, need to re-power the ESC again, then the new set parameters will take effect.

2. Using Mobile phone APP to set the ESC parameters and view real time data (need to purchase the Bluetooth module separately)
   A. Wire connection diagramB: Operating steps
   1. Connect the ESC to the Bluetooth module and battery correctly base on above wire connection diagram.
   (Blue tooth module Red wire corresponds to “+” and Black wire corresponds to “-”, pay attention to the “+” and “-” lettering on the ESC)
   2. Download and install ZTW APP well, open APP and connect it with Bluetooth, then you can start to set the ESC parameters and check the real time data by APP.
   3. After set the new ESC parameters, need to re-power the ESC, then the new set parameters will take effect.

Programmable parameters items and instructions

1. Programmable parameter items and corresponds programmable set values
   Parameter Items| | | | | | | | | |
   ---|---|---|---|---|---|---|---|---|---|---
   1.Gov Mode| ESC-StoGov| Ext-Gov| | | | | | | |
   2.Low Voltage Cutoff Threshold| OFF| 2.7V| 3.0V| 3.2V| 3.4V| 3.6V| 3.8V| | |
   3.Timing| ‘Auto| Low| Middle| High| | | | | |
   4.BEC| GV| 7.4V| 8.4V| | | | | | |
   5.Motor Rotation| CW| CCW| | | | | | | |
   6.Governor Parameter P| 1| 2| 3| 4| 5| 6| 7| 8| 9| 10
   7.Governor Parameter I| 1| 2| 3| 4| 5| 6| 7| 8| 9| 10
   8.Acceleration| Fast| Normal| Slow| Very Slow| | | | | |
   9.Auto Restart Time| off| 90s(ON)| | | | | | | |
   10.Helicopter Model| Other| OMP-M4| OMP-M4MAX| | | | | | |
   11.Restore Factory Setup Defaults Restore Factory Setup Defaults
   Note: ” ” value are default settings.
2. Programmable parameter project description
   1 Gov Mode:
   EXT-Gov/ESC StoGov, default setting is ESC StoGov.
   2 Low Voltage Cutoff Threshold
   2.7V/3.0V/3.2V/3.4V/3.6V/3.8V adjustable,default setting is 3.0V.
   (Note:the voltage means each cell voltage. For example if you used 6 cells Lipo battery, then the low voltage threshold value is 6x set voltage value).
   3 Timing
   Adjust the angle of the motor electrically. Auto/Low/Middle/High adjustable, default setting is Auto.
   4 BEC
   6.0V/7.4V /8.4V adjustable, default setting is 8.4V.
   5 Motor Rotation
   CW/CCW adjustable, default setting is CW.
   6 Governor Parameter P
   Maintain the stability of the current motor speed.
   7 Governor Parameter I
   Control the supplement extent when the actual motor speed is below expectation. The big value means higher supplement and may cause too much supplement, the smail value means lower supplement and may cause insufficient supplement.
   8 Acceleration
   The higher value means more soft throttle acceleration.
   9 Auto Restart Time
   The ESC will cut off its output when the throttle amount is between 15%-30%, if you increase the throttle amount to above 30% within preset time period (0-90s), the motor will rapidly start up and accelerate to the speed corresponds to the specific throttle amount, complete the shutdown and restart up. If you move the throttle stick to over 30% beyond the preset time period, the ESC will enter the soft start-up process. (Note: This function won’t take effect if the throttle amount is less than 15%).
   10 Helicopter Model
   When selecting the M4 / M4MAX corresponding models, there is no need to calibrate the speed controller for constant speed control. For other options, the speed controtler needs to calibrate the speed for the first time when enabling constant speed control.
   11 Restore Factory Setup Defaults
   Restore Factory Setup Defaults

The Fixed Speed Function Settings

1. Fixed speed description
   By speed calibration, the motor speed-throttle value corresponding curve is established. The throttle value is set to a fixed value on the remote control, the output of the throttle value corresponds to the speed, and the motor load changes to maintain the  same speed.

2. Speed calibration process
   1 Need to do the throttle calibration first before the speed calibration (if already done, just skip this step).
   2 Make sure the main rotor pitch is at 0 degrees.
   3 Pull the throttle stick to the minimum position, waiting for the esc self- check process.
   4 Push the throttle to 50%, the rotor of the helicopter will start to slowly accelerate (the main rotor pitch is zero degrees, the helicopter will not lift off) and wait for the acceleration to complete, When the rotor speed is stable, push the throttle stick to the minimal position.
   5 Speed calibration is finished.
   6 If itis M4/M4MAX, calibration is not required, and you can directly choose the helicopter type. For other helicopters, you need to first select “Other” and then proceed with calibration.

3. How to calculate the main rotor RPM at 100% throttle
   1 Connect the LCD program card or Bluetooth after the speed calibration is completed to find the records as shown:![ZTW 85A Skyhawk Series RC Helicopter

• helicopter](https://manuals.plus/wp-content/uploads/2024/04/ZTW-85A-Skyhawk- Series-RC-Helicopter-helicopter.jpg)The values in the figure is just a example, depending on the actual display values. This value is the maximum electrical speed that the motor can achieve at 100% throttle.
  2 for example, if motor have 10 poles, using 13 motor teeth with main teeth of 120T, the gear ratio is around 9,23.
  And Formula:
  100% throttle speed of the main rotor=MAX RPM+(motor poles +2)+ gear ratio Then the main rotor 100% throttle speed is 145000 + (10+ 2)+(120+ 13) is around 3410RPM
  If the main rotor during 3D flight requires to be maintained at 2500 rpm, the fixed speed throttle needs to be set at 2500 + 3410 to get about 0.8. At 0.8, the throttle value needs to be set at 80%.
  3 You can set motor poles and the gear ratio (GR) on a LCD program card to get the speed of the main rotor at 100% throttle.
  (1) Connect the ESC to a LCD program card after the speed is calibrated, and then enter the interface as shown above.
  (2) Press “OK” to select options related to “motor poles” , press “OK” to select gear ratio (GR) by , then press “OK” will show the specd of the main rotor at 100% throttle.

Protection Function

1. Abnormal power-on voltage protection: Ihe ESC enters a protective state once the input voltage detected is not in the operating voltage, Prompting LED light to flash.
2. Start-up protection: If the motor fails to start normally within 2 seconds after pushing the throttle to start, the ESC will cut off the output power, and you need to make the throttle calibration again, then ESC can be restarted. Possible reasons:  sconnection or poor connection between ESC and motor, the propeller or motor is blocked by other objects, the gearbox is damaged, etc.
3. Over-heat protection: When the temperature of the ESC is over about 110°C, the ESC will automatically reduce the output power for protection, but will not fully shut down the power, reduce it to 70% of the full power at most to ensure the motor has  enough power to avoid crashes.
4. Throttle signal loss protection: The ESC will reduce the output power if throttle signal is lost for 1 second, will cut off output to the motor if the throttle signat is lost over 2 seconds. If the throttle signal restored during power down, the ESC will immediately restored throttle control. In this way, the ESC will not protect when the signal loss less than 2 seconds, only when the signal lost is over 2 seconds or longer time. And the ESC will reduce the output power gradually instead of cutting off it immediately, so the player has enough of time to save the plane, taking into account safety and practicality.
5. Over load protection: The ESC will cut off power or restart automatically when the load increased a lot suddenly, possibie reason is the motor blocked.
6. Low voltage protection: When the operating voltage of the ESC have exceeded the protection voltage set, power will be gradually reduced for safety, but will not be turned off, These will still be up to 50% of power, to ensure that the motor has the power to land.
7. Over-current protection: When the peak current exceeds the specified value, the ESC will immediately cut off the output power, and then restart to restore the power. If the current exceeds the specified value again, the output power will be completely cut off. Possible reason is overload, burnt motor and so on.
8. Break protection: If there is a break in the connection between the motor and ESC. Check the motor is fully connected,check connectors or solder joints are as they should be.

Explanations for Warning Tones

milliseconds)
5.The voltage is not within the range| “DoRaMi-DoRaMi-” (every 200 milliseconds)

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