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Micro servos compared

on January 5, 2009 11:43 PM | Permalink | Comments (0) | TrackBacks (0)

I'm beginning a new project that uses micro servos. Here's a little table that I'm using to compare various options.

Model	Mode	Size	Wgt	Speed@5V	Power@5V	Speed@6V	Gears	Street
HTX900	Analog	21.0x12.0x22.0mm	9.0g	0.12 sec/60°	1.6kg/cm	0.11sec	Nylon	$4
Towerpro SG90	Analog	21.0x11.5x27.0mm	9.0g	0.12 sec/60°	1.2kg/cm	Yes	Nylon	$5
E-sky EK2-0508	Digital	22.8x11.5x20.8mm	7.5g	0.10 sec/60°	1.0kg/cm	Yes	Nylon	$10
Towerpro MG90	Analog	23.0x12.2x29.0mm	14.0g	0.11 sec/60°	2.2kg/cm	0.10 sec	Metal	$12
E-flite S75	Analog	23.0x12.0x24.0mm	7.5g	0.12 sec/60°	1.17kg/cm	No	Nylon	$14
Spektrum DSP75	Analog	23.0x12.0x24.0mm	7.5g	0.11 sec/60°	1.17kg/cm	No	Nylon	$20
Futaba S3114	Analog	21.8x11.0x19.8mm	7.8g	0.10 sec/60°	1.5kg/cm	0.09sec	Nylon	$15
Power HD-2216HB	Digital	22.8x12.0x25.4mm	13.6g	0.13sec/60°	1.8kg/cm	Yes	Metal	$20
Align DS410	Digital	22.8x12.0x25.4mm	12.7g	0.13 sec/60°	1.8kg/cm	0.09sec	Metal/Plastic	$26
JR NES-241	Analog	21.5x11.5x22.0mm	9.0g	0.23 sec/60°	1.3kg/cm	Yes	Plastic	$30
JR DS290G	Digital	21.0x11.0x21.0mm	7.0g	0.08 sec/60°	0.9kg/cm	0.07 sec	Nylon	$35
Futaba S3154	Digital	21.8x11.0x19.8mm	7.8g	0.10 sec/60°	1.5kg/cm	0.09sec	Nylon	$35
Ino-Lab HG-D202MG	Digital	23.0x11.4x24.1mm	9.8g	0.16 sec/60°	2.5kg/cm	0.13 sec	Metal	$35
Align DS410M	Digital	22.8x12.0x25.4mm	13.5g	0.13 sec/60°	1.8kg/cm	0.09sec	Metal	$37
HiTec HS-65MG	Analog	24.0x12.0x24.0mm	11.2g	0.16 sec/60°	1.6kg/cm	0.13sec	Metal	$37
HiTec HS-5065MG	Digital	23.6x11.6x24.0mm	11.9g	0.14 sec/60°	1.8kg/cm	0.11sec	Metal	$47

The conversion for torque from kg/cm to oz/in is to multiply by 14.7. So a servo with a torque of 1.0 kg/cm has an imperial torque of 14.7 oz/in.

Model	Mode	Size	Wgt	Speed@5V	Power@5V	Speed@6V	Gears	Street
Futaba S9257	Digital	36.0x15.0x29.0mm	26g	0.08 sec/60°	2.0kg/cm	No	Nylon	$60