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Servo HPS CB701 HV Digital 0.07s/49.0kg at 7.4V Perfect also for drift

Article number: ACT01006020
Manufacturer: Futaba
Manufacturer Product-No.: 01006020
available stock: 2
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Servo HPS CB701 Car 0.07s/49.0kg at 7.4V

Experience the new HPS servo generation! The most powerful Futaba RC car servo ever in standard size! The Futaba HPS-CB701 (successor of the CB700) is specially designed for 1/8 and 1/10 RC cars and sets new standards with 49 kgcm torque and 0.075 sec/60° actuation time at 7.4V as well as a new all-aluminum housing. A new HPS brushless motor has been developed for the HPS servos, which stays much cooler in operation. Together with the new HPS technology, this results in lower power consumption over the entire operating time. The HPS-CB701, like any S.BUS2 servo, can be connected to all conventional receivers with PWM modulation and can be optimally adapted to the respective operating conditions by programming.

The servo is fully compatible with the SR mode ("Super Response": fastest signal transmission) of the T4PM, T7XC, T7PX, T7PXR and T10PX, but can of course also be operated with all other Futaba receivers and with all other Futaba transmitters in normal mode. No mode settings on the servo are required for this. The addressing of the servos can be done in different ways:

1. with the handy programmer SBC-1 2. at the PC with the USB adapter CIU-3 3. at the S.BUS connection of the transmitter

The following parameters can be set:

  • S.BUS channel assignment
  • Servo polarity
  • Soft start (On / Off)
  • Mode selection in case of signal failure Hold or Free
  • Soft servo run (On / Off)
  • Servo position (servo tester)
  • Servo center adjustment +/- 300 µs (approx. 30 degrees)
  • Servo speed, 0.39 - 9 seconds per 45 degrees
  • Deadband adjustment (deadband)
  • Servo travel adjustment left and right separately, approx. 50 - 175%.
  • starting force
  • damping
  • holding force
  • ID storage

The new HPS servo technology High power with lower power consumption - how does that work?

Put simply: At the beginning of a servo movement (start-up behavior), a considerably larger current pulse is sent to the new type of HPS servo motor for a very short time than with previous servo motors. However, as the servo movement progresses, the HPS motors developed by Futaba engineers and the associated HPS control system require considerably less energy to maintain the power. This results in a significantly lower current drain from the battery over the operating time, i.e. the operating time is noticeably and measurably extended for the same battery. This advantage can only be exploited if all the necessary boundary conditions are right and all the components are optimally matched to one another. The main focus here is on the power supply for the receiver system and the servos.

The following instructions apply in general to any receiving position when powerful servos are used, but especially when using the HPS servos:

The power supply must be optimized in each individual component for all conditions that occur. This applies to the entire functional chain and starts with the choice of battery and only ends directly at the servo. In the case of HPS servos, the primary concern is to be able to supply the servo with short-term, high pulse currents (peaks) throughout the entire functional chain (see Startup behavior of HPS servos), and not necessarily high continuous currents. Only then can the performance of the HPS servos be fully exploited.

The power supply must be dimensioned in such a way that constant continuous current supply is guaranteed and occurring voltage fluctuations (caused by current peaks) are kept as low as possible to prevent "re-booting" of receivers or gyros etc. (see below).

Batteries: Batteries with the lowest internal resistance and the highest possible pulse current are needed here. Batteries with too low capacity generally tend to larger voltage fluctuations at high load and are therefore not suitable. Here we generally recommend not to save on the battery and not to use very old batteries that may still work under normal conditions.

Cables and connectors: Always use the best contacts with the highest contact cross-section. The cable cross-sections should always be as large as possible and all servos should be connected directly to the receiver with the shortest cables (prerequisite: the receiver must have a sufficiently strong high-current supply). We generally do not recommend the option of installing several servos in series on one line when using S.BUS servos, since pulse currents for several servos cannot always be transmitted optimally on one line.

Battery backers: Most battery backers are not sufficiently dimensioned for HPS technology (see recommendation below). Some manufacturer specifications do not really help. The battery backer must be "fast" and must actually be able to deliver the pulse current quickly.

Voltage regulators: Are generally slow current suppliers and hardly suitable for keeping the voltage constant at high pulse currents. We generally recommend not to use voltage regulators when using HPS servos and to use the appropriate batteries for the servos used instead: LiFe batteries or LiPo batteries, each with the lowest internal resistance. Devices where the output voltage can be regulated or adjusted generally work with voltage regulation and are therefore not recommended. This also applies to battery backers.

Fuses in the servo output: Devices with fuses in the servo output should generally not be used for HPS servos. The fuses are designed for conventional servos and could simply interrupt the operation of an HPS servo much too early when HPS servos are used.

Electronic speed controllers with BEC: Futaba recommends against operating HPS servos on BECs altogether. But even here there are suitable solutions. At least 10A continuous current should be available. With this, for example, an HPS-CB700 servo can be operated in an electric car, together with a standard servo. With 2 HPS servos the BEC should supply at least 20 A. For this we recommend in any case to use additionally buffer batteries, which then supply the current peaks and keep the voltage fluctuations as low as possible. Power capacitors are not sufficient here. In our program we offer a BEC battery backer for backup batteries. If more than 2 HPS servos are to be used, we generally recommend to make the power supply of the receiver system independent of the drive battery and to separate it from the drive motor, i.e. to use the receiver battery for the power supply of the receiver system and the drive battery only for the drive motor. Then a simple controller without BEC (opto-coupler) is sufficient, the drive motor has more battery capacity available.

What can happen if unsuitable components are used: If several HPS servos start up at the same time, the voltage could briefly drop to the point that receivers or gyros, for example, but also digital servos, reboot. In any case, this start-up process takes time until control is possible again, gyros may not be able to find the zero point and remain inoperative. Often all servos also perform a small control movement during the start-up process, which then requires a pulse current, which in turn causes the voltage to drop, the problem worsens.....

However, if all the constraints described above are met, the use of HPS servos results in the highest performance and lower power consumption. Here an investment is worthwhile in any case. Many pilots speak of "better control feel" after optimizing the power supply; the servos now simply run faster and more precisely.....

For the optimal operation of HPS servos we give the following recommendation for the power supply:

Use of 2 HPS servos: Continuous current: 15A - 20A; Pulse current: 40A - 45A; Recommendation: High current LiPo o. LiFe 2Ah

Use of 5 HPS servos: Continuous current: 30A - 40A; Pulse current: 80A - 100A; Recommendation: High current LiPo o. LiFe 4Ah

Use of 10 HPS servos: Continuous current: 70A - 100A; Pulse current: 100A - 240A; Recommendation: High current LiPo o. LiFe 6Ah

Hint: When using a battery backer, the battery capacity doubles (if two batteries of the same capacity are used). Ideal for the HPS servos are the DPS systems (Dual Power Supply: high quality battery backer), PDS systems (Power Distribution Systems). For operation with BECs, the DPS system offers a battery backer with built-in backup battery.

Features:

  • S.BUS2 high performance HPS digital servo.
  • Metal housing and metal gearbox
  • HPS brushless motor technology
  • T-FHSS SR compatible (Super Response)
  • Hi-Voltage
  • Ball bearing
  • Low wear potentiometer
  • High resolution
  • High return accuracy

Technical data: Actuating speed 60°: 0.075 s (7.4 V) Actuating torque: 49 kgcm (7.4 V) Operating voltage: 6.0 - 8.4 V Control frequency: 50 - 300 Hz Weight: 76 g Dimensions: 40.5 x 21 x 37.8 mm

Scope of delivery: 1x Servo HPS CB701 High Performance


Warnhinweis!
ACHTUNG: Nicht für Kinder unter 14 Jahren geeignet. Benutzung unter unmittelbarer Aufsicht von Erwachsenen.

Breite in mm 21,00
Getriebe Metall
Gewicht in g 76,00
Hersteller Futaba
Höhe in mm 37,80
Länge in mm 40,50
Servoart Digital
Stellkraft bei 7,4V in kg 49,00
Stellzeit bei 7,4V in sec 0,08


 

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