RCU Forums - View Single Post - Airtronics MX-3FHSS (Problem)

08-08-2008 | 12:49 PM

#10

Snaut Rocket

Senior Member

Joined: Jan 2006

Posts: 3,304

Likes: 0

Received 0 Likes on 0 Posts

From: Merced, CA

RE: Airtronics MX-3FHSS (Problem)

Quote:

ORIGINAL: wrob

I bought a second receiver, it doesn't move the servos when I turn it on. Which seems right. There must be something wrong with the first receiver. It certainly cost me a lot of money.

My transmitter takes like 30 seconds or longer to bind with either receiver.

PS

Posting this a day later after taking my buggy to Revelation Raceway in Ontario.

I had problem last night with the steering servo (brand new HS-965MG) losing control of my buggy in a turn. The buggy went straight... This is with the second receiver. A week earlier, with another receiver (same radio), I was having difficulties turning my Truggy with a HS-645MG servo. I then thought it was my battery or servos saver adjustment (which was a bit loose). At Revelation Raceway last night, I put my new spare HS-7955TG in place of the HS-965MG and didn't have a problem the rest of the evening. Remembering back to when I bought my RC8 RTR, the MX-3FHSS just hated the stock servos - they quivered and buzzed.

Finally, here's what I think may be the problem. The frame rate of the receiver isn't compatible with the servos I have (and probably a lot of servos out there). I came to this conclusion after reading about the DX3R's frame rate adjustment.

http://www.rcuniverse.com/forum/m_7037222/tm.htm

I think the Airtronic MX-3FHSS has a frame rate of 100hz (not sure). Fast. Perhaps too fast for some servos.

All the problem servos were analog, the HS-7955TG is digital (no problems).

My advise, don't buy this radio unless you're sure it's compatible with your servos. I think it's a good radio, but just not matching up with what I have. It has been an expensive lesson. $250 for the radio and extra receiver, $200 for a blown up engine, tore up a couple of cars and I've bought about 4-5 new servos trying to get things to work. I've spent over $700 on this voyage (not all lost) and I'm now looking to buy something else. Probably a DX3R...

I don't recommend this radio to upgrade a RTR vehicle with less expensive servos.

I'm not a RC Radio technician - just a consumer offering a word of caution.

Well yes.
It helps to be using digital servos, with 2.4ghz controllers.
Im running a digital steering servo, but analog throttle.
And i can see it some times twitch, but nothing big.
You said you bought another receiver, you could of just sent it in to airtronics and they would have replaced free of charge, cause of the warranty.

Reply Like