Updated Steel Gears
|KST DS125MG Servo Specifications|
|Dimensions||30 mm wide x 10 mm thick x 35.5 mm high|
|Stall torque (4.8V)||6.0 Kg.cm||83 oz in|
|Stall torque (6V)||7.0 Kg.cm||97 oz in|
|Operating speed (4.8V)||0.15 sec/60°|
|Operating speed (6V)||0.12 sec/60°|
|Operating voltage||4.5V to 6.0V|
|Lead length||16 cm||6.3 in|
|Weight||27.5 g||0.97 oz|
|Bearings||Dual ball bearings|
|Motor Type||DC motor|
|Supplied accessories||1 metal output arm, 3 substantial plastic output arms, 2 output arm retaining screws, 3 mounting screws|
|Optional accessories||Frame for MKS DS6125 & KST DS125|
KST servos? I had to evaluate these servos for myself before I placed orders with KST. So I had my buddy Tuan the tech guy test them out and give some feedback. His findings-
Ok Ali, here are some of the numbers at 6.6v (LiFe):
The accuracy and consistency is not as good as the MKS, JR, Atx.
The deadband is not very consistent as each incremental movement requires either 2-3 micro seconds of signal. Kinda like the JR 378 before.
However, due to the pricing these may represent very good value for the sport flyer.
I ran these all on 6.6v and there were no issues, however under a constant load, these may be effected by the higher voltage, just not sure what the critical point of damage would be.
I also did not test torque yet, I need to pull out my test stand to get to that. Maybe tomorrow.
Let me know if you need more info.
Resolution usec/1 degree
|0-60 degrees||Slow current (A)||Fast Current||Stall Current||Remarks|
|.158||.442||.953||Movements not very smooth, accuracy is decent though not super consistent. Suspect feedback pot is not as accurate as MKS. Rating 1-10 have to say around 7 as MKS would be 9|
|.242||.613||1.036||Same as above|
Having coreless motor, the accuracy seems to be better than the other two KSTs I tested. I am running 6.6 so the current looks low, but this is a decent servo. Again the limiting factor to the servos performance is the pot. With a better pot, I would rate the servo a 8.5 due to value. This would be good for sport flyers.
|Servo||Specs @ 4.8v||Measured @ 4.8v||Specs @ 6.0v||Measured @ 6.6v|
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