breakdown current for servos under max torque

[cheeyw]

hi
What is the max safty current that can be pumped into a servo when it is taking a max torque? My servo specs are as follows...
The Hitec HS-5475 is a standard size servo but it is Digital servo allowing for a much more responsive and more precise positioning of the servo step. This servo has a torque capacity of 76 oz-in and Speed of 0.18 Sec/60 Degrees




Hitec HS-5475HB Digital Standard size servo

Control System: +Pulse Width Control 1500usec Neutral
Required Pulse: 3-5 Volt Peak to Peak Square Wave
Operating Voltage: 4.8-6.0 Volts
Operating Temperature Range: -20 to +60 Degree C
Operating Speed (4.8V): 0.23sec/60 degrees at no load
Operating Speed (6.0V): 0.18sec/60 degrees at no load
Stall Torque (4.8V): 61 oz/in. (4.3kg.cm)
Stall Torque (6.0V): 76 oz/in. (5.5kg.cm)
Operating Angle: 45 Deg. one side pulse traveling 400usec
360 Modifiable: Yes
Direction: Clockwise/Pulse Traveling 1500 to 1900usec
Current Drain (4.8V): 8mA/idle and 150mA no load operating
Current Drain (6.0V): 8.8mA/idle and 180mA no load operating
Dead Band Width: 8usec
Motor Type: 3 Pole Ferrite Motor
Potentiometer Drive: Indirect Drive
Bearing Type: Dual Ball Bearing
Gear Type: Karbonite
Connector Wire Length: 11.81" (300mm)
Dimensions: 1.50" x 0.8"x 1.4" (41 x 20 x 37mm)
Weight: 1.4oz (39g)

[Acetronics]

Hi,Cheeyw

no data has been collected on this subject yet, as far as I know.

But there's a simple way to measure it: use a POLYSWITCH ( from Raychem)RUE fuse,adapted to the max Current your servo needs at stall, glued on the motor , and wired in series with it ;
When temp comes to 120°C ( upper temp limit fot the motor ) it will break the power line ... and save the servo !!!
Let things refresh, and it will work again ...nice ???

But consider R/C servos are not built for that kind of treatment ...a not reversible gear servo would be much more convenient here !!!

Good BBQ !!!

Alain