MTR Series Servo Motors are rated for 25o C ambient temperature with the motor mounted to a 10″ x 10″ x 0.25″ aluminum heat sink. For operation of the motor in higher ambient temperatures, the continuous torque of the motor must be derated as follows:

Cont Torque @ amb. Temp, to C=Rated Cont Torque x (155-t)/130.

Servo Motor Sealing

The S-Series and MTR-Series servo motors are designed to comply with an IP65 protection rating (excluding the cable connector on S-Series 30-750 Watt models). All MTR-3N, MTR-3S, MTR3T1x, MTR-3T2x and S-Series motors rated 1-5 kW include a shaft oil seal as a standard feature, while the 30-750 Watt S-Series motors, MTR-3T4x, MTR-3T5x, MTR-3T6x and all stepping motors are not available with a shaft seal. Adequate precautions should be taken when mounting the motors to ensure proper protection against excessive exposure to fluids and spray.

Servo Motor Holding Brakes

Servo motors are available with an optional integral parking brake. The brakes are designed for failsafe operation and must be energized using a 24 Vdc power supply to release the brake.

The brake should be used only to hold motor position once the axis is stopped. Using the brake to stop a moving load may result in damage or premature failure of the brake mechanism. Use an external mechanical brake to stop moving loads during an emergency stop or loss of power.

The brakes require a finite time to engage and release the load as shown in the motor specification tables. These times must be considered in the brake sequencing logic when employing brake motors on vertical axes to prevent the load from falling. The controller must remain enabled until the brake is fully engaged or the load will not be adequately restrained.

The brake power supply is the user’s responsibility and must comply with the brake specifications shown in the motor specification tables. GE Fanuc offers a 24 VDC, 5 Amp DIN-rail mounted power supply (IC690PWR024) that may be appropriate as a brake supply on multi-axis systems. A panel mounting conversion kit is also available (IC690PAC001). Brake power cables are available from GE Fanuc in several pre-finished lengths as shown in Table 3-13.

NEMA Motor Mounting

The MTR-Series and S-Series motors have mounting configurations as shown in the table below. For dimensional information on these motors (including mounting dimensions), please see the mechanical drawings in Chapter 3.

The MTR-Series stepping motors have standard NEMA shaft and flange mounting configurations as shown in Table 2-17 below. For dimensional information on these motors please refer to the mechanical drawings in Chapter 3.

S-Series Servo Motor Vibration Testing

There are two vibration tests for these motors, the Sweep Test and the Resonance Point Test.

Sweep Test. The motor is subjected to a 5G variable frequency test for eight hours in each of three axes (X, Y, Z). For the purpose of these tests, X axis is parallel with the motor shaft, Y axis is parallel with the encoder connector, and Z axis is at a 90 degree angle to X and Y. In this test, the vibration frequency increases from 20 to 3,000 Hz. over a two-minute span, then decreases from 3,000 to 20 Hz. over a two-minute span. This pattern is repeated for a period of eight hours.

Resonance Point Test. First, the resonant frequency having the highest vibration is identified while testing the motor with a 5 G variable frequency (20 to 3,000 Hz.) in three directions (X, Y, Z). Then, the motor is vibrated 10 million times in each direction (X, Y, Z) at the identified resonant frequency.

Heat Load and Cooling

The heat load of the S2K Series controllers is dependent on the model as shown below:

Stepper Controller

Model SSI105: Heat Load = 20 Watts + (0.3 * current setting in percent) or 50 watts max.

Servo Controllers

Model SSI104: Heat Load = 25 watts + (35 * duty cycle) watts or 60 watts max.

Model SSI107: Heat Load = 35 watts + (65 * duty cycle) watts or 100 watts max.

Model SSI216: Heat Load = 50 watts + (150 * duty cycle) watts or 200 watts max.

Model SSI228: Heat Load = 60 watts + (280 * duty cycle) watts or 340 watts max

Model SSI407: Heat Load = 35 watts + (65 * duty cycle) watts or 100 watts max.

Model SSI420: Heat Load = 60 watts + (250 * duty cycle) watts or 310 watts max.

Duty cycle is defined as the percent of time the controller is at full rated output divided by the total cycle time. The SSI104 and SSI107 controllers are designed to operate at full rated current with only natural convection cooling at ambient temperatures up to 50°C. The SSI216, SSI228, SSI407 and SSI420 models have built-in fan cooling.

The controllers must be installed vertically for effective cooling. Allow a minimum clearance of 3 inches above and below the unit. A minimum of 2 to 3 inches clearance is also recommended on the right and left sides of the unit where possible.

Note

For UL approved installation of the following controllers, maximum ambient temperature is 40°C (104°F): IC800SSI216P2, IC800SSI216RP2, IC800SSI216D2, IC800SSI216RD2, IC800SSI228P2, IC800SSI228RP2, IC800SSI228D2, IC800SSI228RD2, IC800SSI407RS1, IC800SSI407RP2, IC800SSI407RD2, IC800SSI420RP2, IC800SSI420RD2.
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GE-FANUC A98L-0031-0026 
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