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adb5375a09
Enabling servo usage on boards with PWM current control
timer5 is used by some boards like the Mini Rambo for controlling motor current via PWM, see stepper.cpp.
```cpp
#ifdef MOTOR_CURRENT_PWM_XY_PIN
pinMode(MOTOR_CURRENT_PWM_XY_PIN, OUTPUT);
pinMode(MOTOR_CURRENT_PWM_Z_PIN, OUTPUT);
pinMode(MOTOR_CURRENT_PWM_E_PIN, OUTPUT);
digipot_current(0, motor_current_setting[0]);
digipot_current(1, motor_current_setting[1]);
digipot_current(2, motor_current_setting[2]);
//Set timer5 to 31khz so the PWM of the motor power is as constant as possible. (removes a buzzing noise)
TCCR5B = (TCCR5B & ~(_BV(CS50) | _BV(CS51) | _BV(CS52))) | _BV(CS50);
#endif
}
```
Using the same timer for controlling servos results in loss of motor control. So use timer4/3 for those boards instead.
[See discussion here.](http://shop.prusa3d.com/forum/software-f13/enabling-auto-leveling-in-firmware-t416-s40.html)
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