How it Works
Great Planes
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GPMM2070
User Manual
4 pgs131.32 Kb0

Great Planes GPMM2070 User Manual

ElectriFly’s™BL-8 Brushless ESC is designed for powering small, brushless motors for 3D aerobats and flat-foam airplanes. The BL-8 ESC is capable of delivering 8 amps of current continuously, or 9 amps of surge current, and has numerous programmable features including battery type (NiCd/NiMH or Li-Po), soft-start, brake, timing and more.
INSTRUCTIONS
Input Voltage: 5 – 10 NiCd/NiMH cells, 2-3 Li-Po cells
• Great for small, high-performance airplanes, from flat foams to
built-up 3D’s.
• Fully proportional forward with brake.
• Very smooth throttle response.
• Custom BEC circuit handles up to 1.5A – great for models
requiring up to three high-powered servos.
• Li-Po compatible, as well as NiCd and NiMH batteries.
• Other programmable features include:
• Brake Control: On/off.
• Safe-Start: On/off, prevents accidental motor spin at start-up.
• Switching frequency: 8kHz or 16kHz, to optimize battery run­time and cool operation.
• Low-V oltage Control:Reduce or cut motor power, but maintain radio control.
• Timing: Soft (7 degrees), hard (30 degrees for outrunners), or automatic.
• Reverse rotation.
• Includes over-temperature protection.
• Pre-installed universal radio connector, micro batter y connector, and 2mm female bullet motor connectors.
Please read and follow these instructions carefully before using.
• Do NOT apply an input voltage that exceeds the maximum specification above.
• Do NOT apply currents to the motor that exceeds the maximum specifications above.
• Do NOT allow the input or output connectors to accidentally touch each other while power is applied. Make sure all connections are insulated electrically.
• Do NOT allow water or moisture to make contact with the ESC’s circuitry as it can cause permanent damage.
• Do NOT place the ESC in a location inside the airplane where air cannot flow. Always provide a path for external air to flow freely across the ESC while in operation.
• Do NOT attempt to touch a rotating motor as personal injury can result! If setting up the motor/ESC on the workbench, make sure the motor is securely attached and that nothing is connected to the output shaft BEFORE applying power.
• Always connect the power battery just before flight, and disconnect the battery immediately after the flight has ended.
The BL-8 ESC is designed to work with brushless motors of all types – except motors that include sensors. Its adjustable timing makes the BL-8 a great choice for great operation with inner-rotating and outrunner type brushless motors. Do NOT attempt to use the BL-8 ESC with traditional brushed motors as permanent damage may result!
IMPORTANT!! The ESC should always be mounted in a location which allows good airflow for proper cooling!! Failure to allow good airflow over the ESC during operation can cause severe overheating, resulting in thermal shutdown and/or permanent damage to the ESC!
Determine the best location for the ESC on the fuselage. If the location of the ESC is not vented or ducted to allow airflow inside and out of the fuselage you will need to create one or more vents or ducts. For some airplanes, mounting the ESC in front of the firewall or next to the motor might be good options.Other airplanes only allow for the ESC to be mounted behind the firewall, in which case air vent holes will need to be cut in the firewall, and air exit holes may need to be cut in the tail end of the fuselage.
Mount the ESC to the airplane in a way that minimizes the amount of shock and vibration to the ESC.Attaching the body of the ESC to the model with double-sided foam tape or Velcro
®
is recommended. It’s also a good idea to try and locate the body of the ESC as far away from the electric motor as possible, to help avoid any unwanted electrical interference.
This ESC has a built-in “BEC” or “Battery Eliminator Circuit” which takes power from the airplane’s main pow er battery and supplies it to the receiver and servos. The BEC delivers this power through the receiver connector. Therefore, it is not necessary to connect a separate battery to the receiver. Always connect the ESC’s receiver connector to the receiver’s throttle channel (see your radio’s instruction manual for details). IMPORTANT!! The BL-8’s BEC
circuit is rated to handle up to 1.5A of current for short bursts – NOT continuous 1.5 amps of current.If your application will use higher powered servos it is very important to make sure to mount the ESC so that a large amount of air can flow over the ESC during operation.
The BL-8’s receiver connector is a universal style plug, and will connect directly to most R/C receivers without need
for physical modification or re-wiring.The orange “signal” wire on the ESC’s receiver plug should be in the same position in the receiver slot as the white wire
STEP 2 – THE BEC CIRCUIT & RECEIVER CONNECTION
STEP 1 – MOUNTING THE SPEED CONTROL
COMPATIBLE MOTORS
IMPORTANT PRECAUTIONS
SPECIAL FEATURES
SPECIFICATIONS
™
2
on Futaba®, the blue wire on the newer Airtronics “Z” connector, the yellow wire on the Hitec “S” connector, or the orange wire on the JR connector. WARNING: This connector is NOT directly compatible with the old Airtronics connector style. Use an Air tronics Servo Adapter to connect this ESC to the older style Airtronics radios.
DISABLING THE BEC CIRCUIT
If using more than 10 NiCd/NiMH or 3 Li-Po cells, it will be necessary to disable the speed control’s BEC circuit and connect a separate battery to power the receiver and servos. Failure to do so will permanently damage the BEC circuit. To disable the BEC circuit:
A. The red wire and its terminal should be removed from the plastic
shell. To do this use a small flat bladed screwdriver to slightly, carefully raise the plastic tab holding the metal pin. Carefully pull the red wire out of the receiver plug.Or, cut a small section of the red wire out completely with wire cutters.
B. Always make sure to cov er the bare terminal or cut wire with electrical
tape or shrink tubing to avoid an unwanted short circuit condition.
C. Connect the ESC’s receiver connector to the receiver’s throttle
channel (see your radio’s instruction manual for details).
A separate battery will then need to be connected to the receiver. When the BEC circuit is disabled, it will be important to remember not to exceed the ESC’s maximum rated current!
WARNING: NEVER ALLOW THE BARE RED (+) AND BLACK (-) WIRES TO TOUCH ON ANY RECEIVER OR ESC, AS PERMANENT DAMAGE WILL RESULT TO BOTH ITEMS AND VOID ALL WARRANTIES!
A polarized micro connector is pre­installed for connecting the ESC to an external battery pack. It’s a good idea for the length of wire between the battery and ESC to be no longer than 6
inches. IMPORTANT! Make sure the polarity of the battery’s
wires/connector matches the polarity of the wires/connector on the ESC, with the battery and ESC’s red (+) wires connected and the black (-) wires connected together.NEVER allow the bare red (+) and black (-) wires to touch as permanent damage will result to both items and void all warranties.
The BL-8 has three output leads. Female 2mm bullet connectors are pre-installed on each lead. These connections are not polarized, so there is no need to match the color of the ESC’s wires to the motor’s wires. Once connected to the motor, make sure all connections are insulated electrically .Failure to do so could result in permanent damage to the motor/ESC if the output leads touch each other while power is applied to the ESC, thus voiding all warranties. If the motor operates in the opposite direction desired, switch any two of the motor wires to reverse the motor’ s rotation, or adjust the “re verse rotation”setting in the BL-8’s programming (see page 3).
Proper adjustment of the transmitter’s controls is critical for proper operation of the ESC.The transmitter’s throttle channel adjustments should be set as follows: A. Set the throttle travel adjustment (ATV, EPA or ATL) to maximum
(+/- 100% or the greatest value available).
B. Set the throttle trim and sub-trim to neutral, or zero. C. For most radio types (including Futaba, Hitec and others) set the
throttle channel’s reversing option to “reverse.”
The BL-8’s normal start-up procedure is very simple, as follows:
A. Turn the transmitter’s power switch to “ON.” B. Move the Tx throttle stick to MINIMUM position. C. Connect the battery to the ESC. D. You will hear one tone
“”if the brake is set to “ON,”or two tones
“”to indicate the brake is set to “OFF.”
E. If the brake setting is O.K.and no other programming adjustments
are needed, skip directly to Step 8 and get ready to fly. If you do wish to change the brake setting or any other programmable feature, disconnect the battery and go to Step 7 below.
The BL-8 has seven programmable features, and will automatically step through each feature in order as shown below. It is not necessary to wait for the ESC to step through all seven programmable features unless you wish to change the setting of the last feature. Each programmable feature has its own distinguishing series of audible tones. Selecting/changing features is accomplished by moving the Tx’s throttle stick in conjunction with certain tones that are emitted by the ESC. Anytime a programmable feature has been set the ESC will memorize the setting until it’s changed again manually. Before entering the programming mode, remove the propeller from the motor and make sure the battery is disconnected from the ESC. It’s a good idea to read through all steps below BEFORE attempting to program your ESC.
IMPORTANT!! It’s critical to remember that only ONE programmable feature can be adjusted at a time. To change more
than one programmable feature, after changing the first feature you must disconnect the battery from the ESC, reconnect the battery, then re-start the programming mode below to change the next programmable feature. It will be necessary to repeat this process for each programming change that you wish to make.
A. Turn the transmitter’s power switch to “ON.” B. Move the Tx’s throttle stick to FULL throttle. C. Connect the battery to the ESC.After a 5 second delay two tones
will sound “ ” to indicate the programming mode has been entered. The ESC will automatically begin scrolling through all of the programmable features in this order: brake > battery type > reverse rotation > soft start > low voltage indication > timing > switching frequency > restore defaults > RPM control.Follow the points below to change any of these features.
D. BRAKE: T o change the brak e setting, simply pull the throttle stic k
to minimum within five seconds of hearing the programming tones noted in step C above. This will change the state of the brake setting - if the brake was on this will turn it off, and vice-versa. You can determine which setting is active by listening to the arming tone. One tone indicates that the brake is enabled, and two tones indicates that the brake is disabled. Skip to Step 8 if you do not wish to make any other programming changes. To CHANGE ANOTHER programmable feature disconnect the battery from the ESC and return to Step B above.
E. BATTERY TYPE: The ESC will automatically sound three
different series of tones to indicate the three battery type settings as shown below. If you do NOT wish to change the battery setting wait after the “ ” tones sound and the ESC will automatically skip to the reverse rotation feature below. To CHANGE the battery type, move the throttle stick to minimum when you hear the tones that match the setting you wish to have. For example, to set for a “2-cell Li-Po” battery wait until the tones for NiCd batteries have ended, then when 2 short tones sound repeatedly “
” move the Tx throttle stick to
minimum position.The ESC will then sound a single tone
“”to
indicate the new setting was accepted, and the ESC is now armed and ready for operation.Skip to Step 8 if you do not wish to make any other programming changes. To CHANGE ANOTHER programmable feature disconnect the battery from the ESC and return to Step B above.
WARNING: Failure to set the proper battery type will likely result in unwanted operation and/or damage to your battery.
STEP 7 – PROGRAMMING MODE
STEP 6 – NORMAL START UP
STEP 5 – TRANSMITTER ADJUSTMENTS
STEP 4 – MOTOR CONNECTIONS
STEP 3 – BATTERY CONNECTION
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