Tower pro mg995 servo12/5/2023 If you're looking at it as a sub $20 budget servo then it's not bad at all. The wires to the motor are unsupported and will almost certainly break through fatigue over time if the servo is exposed to moderate or high levels of vibration. The feedback pot and motor are connected to the PCB by wires and dabs of glue support these wires only where they mount on the pot. The PCB on all the units I inspected was incorrectly inserted into the case so that it was sitting on an angle rather than square to the bottom (not a biggie but perhaps indicative of a lower QC standards?). physically, the assembly leaves a little to be desired. these servos adhere to Futaba standards (spline and direction) but come with a JR/Hitec connector.ĩ. without a servo-arm, the weight is 2oz exactly, not the 1.78oz advertised.Ĩ. resolution is "okay" but not as good as most other brands of digital servos and there are even some good non-digitals that are better.ħ. This is to say that if you command the servo to move clockwise to a position, it will actually move past that position (by 3 degrees or so) then move back to the correct position.Įven more strangely, if the servo is at rest and you try to move the arm, it actually moves *towards* the pressure being applied.Ħ. In essence, this mismatch manifests itself as significant overshoot when the servo is repositioning. the servo-amp is not well matched to the motor/geartrain/feedback pot. they do appear to operate with a higher motor drive frequency than a regular non-digital servo so may well be digital.ĥ. they are all metal geared - even the gear driven from the motor shaft appears to be metal, unlike most other MG servos which use a nylon gear at this point in the train.Ĥ. they are quite fast, perhaps as fast as claimed - again, I've yet to actually measure them.ģ. they are very torquey - I haven't measured the torque yet but it may well be the amount claimed.Ģ. Keep in mind I'm also using NiMh batts so that's only a 4.8 volt setup.5 cell hump pack is next on the list.I've been checking these servos out and can report the following:ġ. I ended up having to back the case screws out about a 1/2 turn because the gears were dragging somehow.that sped it up a ton and it's faster than the stock one and probably twice as strong. I removed a lot of the excess grease that was in there, but that's up to you. then you make sure your gear train is clean and put that all back together. then you reinstall it back in there in the exact same position and make sure your leads don't touch as you put it together. Resolder the wires one at a time so you don't cross anything. You just note the position of the pot, take out the screw holding it in, desolder it from the traxxas servo, and cut the leads to match the Towerpro pot. Under the gear train is the electronic portion that has a motor, a circuit card, and a potentiometer w/ 3 wires on it. If you take the case screws out, you have a gear train (good to have a pic handy to get it back together later). I'm buying the Towerpro MG945 next and doing the same ing if for my throttle. What worked for me may not work for the next guy, but the pot seems to be the only real problem with these so far. Only problem I can see is the inconsistency you get with uber-cheap taiwan made stuff. Basically for $13 plus your old 2055 servo you can have something very comparable to the Hitec. I think they didn't clearance the geartrain right from the factory, so it needs a little slop to work right.hopefully the gears will wear in a little and I can tighten it up the rest of the way.but for now I absolutely love this thing.Īnd for the noise.I could care less, there's no way I'm going to hear it over a running nitro motor. Also noticed that it gets much faster and stronger if you back the case screws out maybe 1/2 turn from fully tight. I took my old 2055 servo apart and stole the pot out of it and soldered it into the MG995 and it works like a champ now. It will use the factory traxxas servo saver, and I noticed too that it had problems finding center.
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