1) Q: Why are my motors getting warm (uncomfortable to the touch over 3 seconds)?
A1: Check to see if motor mounting screws are protruding into the wired coil. Having a
screw pinch wires can cause electrical short and may damage more than just the motor
(i.e. ESCs, PDB, Flight Controller).
A2: Check for magnet slippage. Slipping magnets may disrupt performance of motor and
cause unwanted desyncs and heat.
A3: Check for dirt or debris in between the stator and magnets.
2) Q: What is causing desyncs?
A1: Desyncs can be caused by multiple of factors. Please check your ESC’s motor
timing setting. Generally, smaller/higherKV motors may be happier with medium to high
timing, where as bigger/lowerKV motors may be happier with medium to low timing.
A2: ESCs that do not have appropriate processor to support high kv operation. Check
ESC processor limits.
A3: Damaged winding can cause desyncs. Sudden electrical short or cut-off will disrupt
the motor commutation phases.
3) Q: Difference between “STAR or WYE Wiring” configuration and “DELTA Wiring”
configuration
A: STAR or WYE Wiring = Higher Voltage and Lower Amperage
DELTA Wiring = Lower Voltage and Higher Amperage
4) Q: What is motor timing
A: The length of the commutation delay determines how long of a zero-current window
there is between the pulses. This means the lowest possible timing the specific motor
will yield will perform better than higher timing. Timing varies depending on motor, prop,
and esc combination. Generally, a motor with lower (less advanced) timing will produce
maximum horsepower at low rpm, and a motor with higher (more advanced) timing will
produce maximum power at high rpm. The best timing setting does not necessarily
achieve the maximum horsepower that the motor is capable of, but rather produces the
maximum horsepower within the rpm range you’re most frequently using on the track.
5) Q: Does the RS2205, RS2205S or RS2306 motors have cooling?
A: EMAX RS motors use custom-designed cooling fins under the top bell construction to
pull up cool air through the stators using centrifugal force and vacuum. The fins’ design
also reinforces the bell’s structural integrity without adding too much unwanted material.
6) Q: What material is used on the RS2205-S and RS2306 shafts?
A: Both RS2205-S and RS2306 shafts use stainless steel alloy that is hardened and
tempered to yield spring-like properties.
7) Q: What is “2205” or numbers represent?
A: the first two digits represent the stator’s overall diameter, and the last two digits
represent the stator’s overall height. For “2205,” it means the motor has 22mm diameter
stator with a height of 5mm.
8) Q: What do I do in the event of a motor slipping magnets?
A: Due to factors that affect properties of glue (like temperature, humidity, chemical
composition, etc.), very rare cases of glue issues at the manufacturing level may occur.
Please contact your sales rep and create a ticket on our websites to resolve this issue
under warranty (https://emax-usa.com/pages/warranty-support) ** Motors that have obvious signs of crash
damage or abuse aside from manufacturing defect may not be considered under warranty.
9) Q: How do I reverse the motor rotation direction without BLHeli suite or GUI?
A: Desolder any two of the three motor wires from the ESC. Swap the order of the leads
and re-solder onto ESC. Switching any two of the motor wires orders will reverse the
direction of motor.