Sign in to our website and become an InMoov member. It will allow you to post message, pictures, and share with others InMoov builders. It's just one click away!
Username or Email Address
juerg posted an update 7 years ago
Just read an article about servos – it provided some insights I would like to share.
It’s true that understanding how a servo works is a good starting point. Though I must say that some things about servos still don’t make sense to me, ahaha.
An example, why on most website selling servos, the specs rarely mention what is the maximum degree rotation a servo can achieve. It seems to be something you should discover once you bought it. Some servos can achieve 180 degrees, some others 120, or 90 to even only 60 degrees.
The HK15298B and HK15298 can rotate 90 degrees.
The MG996R can achieve approximately 120 degrees.
The MG946R can achieve 180 degrees if I recall correctly.
Here is a standard specs data sheet for the MG946R:
Torque: 4.8V: 145.8 oz-in (10.50 kg-cm)
6.0V: 180.5 oz-in (13.00 kg-cm)
Speed: 4.8V: 0.20 sec/60°
6.0V: 0.17 sec/60°
Weight: 1.94 oz (55.0 g)
1.60 in (40.7 mm)
0.78 in (19.7 mm)
1.69 in (42.9 mm)
Motor Type: 3-pole
Gear Type: Metal
Rotation/Support: ? (add)
Rotational Range: ? (add)
Pulse Cycle: 1 ms
Pulse Width: ? (add)
Connector Type: JR
You are right – there are many missing pieces in the specs the producers or resellers provide.
Maybe we could make a call for all builders to ask servodatabase for additional columns in their filter and list?
I just started with a mail to firstname.lastname@example.org!
Maybe a servo for the legs? (don’t look at the price)