MS-1.5A Servo

MS-1.5A Servo

The MS-1.5A servo is developed independently by Makeblock. Its dimensions are similar to common 9g servos.

Function comparison

	MS-1.5A servo	Earlier 9g servos
Servo hub mounted before delivery	Yes	No
Supporting quick fitting	Yes	No
Compatible with Makeblock metal parts and Lego blocks	Yes	Yes, but adapter brackets required
Physical limit	No (The circuits are redesigned to better protect the servo and thus ensuring longer service life.)	Yes

Connection example

Dimensions (in millimeters）

Specifications

With the latest technology in the servo industry, the MS-1.5 servo provides significantly improved performance. The following describes its specifications.

Electrical specifications (performance parameters)

Item	4.6 V	6.0 V
Operating speed (without load)	0.11 ± 0.01 sec/60°	0.10 ± 0.01 sec/60°
Operating current (without load)	270 mA ± 50 mA	380 mA ± 50 mA
Stall torque (when locked)	1.5 kg ± 0.30 kg·cm	1.8 kg ± 0.30 kg·cm
Stall current (when locked)	1200 mA ± 50 mA	1500 mA ± 70 mA
Idle current (when stopped)	4 mA ± 1 mA	4 mA ± 1 mA
Service life (without load)	> 180 thousand times	> 150 thousand times

Note: The servo operates without load when the average value of item 2 is defined.

Mechanical specifications

Item	Specification
Overall dimensions	See “Dimensions.”
Limit angle	No
Weight	Subject to the actual weight
Wire specification	JST 2.54mm #30 PVC black-white-red
Wire length	260 ± 5 mm (connectors not included)
Horn specification	20T
Horn type	N/A
Excessive play	≤ 1°

Control specifications

Item	Specification
Control system	N/A
Amplifier type	N/A
Operating travel	180°± 5° (500 to 2500 µ sec)
Left-right travelling angle deviation	≤ 5°
Centering deviation	≤ 1°
Neutral position	N/A
Dead band width	N/A
Rotating direction	Counterclockwise (500 to 2500 µ sec)
Pulse width range	500 to 2500 µ sec
Maximum travel	About 180° (500 to 2500 µ sec)