Flysky NB4+ Setup Question
 

After several years of use my Sanwa M17 steering pot needs to be replaced. As backup, I purchased a new NB4+ and some FGr4Sv2 receivers. Updated the FW and receivers. Set the NB4 to one way and four channels. All my servos are digital and the NB4 is set for digital. What I noticed is that the NB4 steering speed and is noticeably slower compared to my M17. That is even with the M17 set to a slower servo speed and the NB4 at "full speed." Any suggestions? Will going to one way two channel improve the response time? Wondering if the throttle response is also being affected? Thanks

What ESC do you have? I had to buy a program box for my hobby wing and set the servo to 7.4v which was defaulted to 6.0v.

I run HW XR10 Pro G2s, HW XR10 Pro (Legacy) and Maclan 32T Pico 100. All ESC BEC's are set to 6.0v. So what you are saying is I have to set the BEC's to 7.4v to get the speed back. I have the HW program box and Maclan phone app. Appreciate your response and info.

From the NB4+ manual: Note: When the user selects 2 channel(Fast), it is the maximum speed mode.

Also from manual: [AFHDS3 1 Way]: It features lower latency, allowing one transmitter to connect multiple receivers. It is applied when the model does not need any return data.

So 1 way communication and 2 ch. is what you want.

I was going to go 1 way 2 channel, but it seemed that channels 3 and 4 did not have voltage to power my motor fans and transponders. Set the NB4+ to 1 way 4 channel for that reason. Have to check this again. Probably will still need to bump up the BEC voltage from 6v to 7.4v to regain servo speed. On an indoor clay track, my B7 and B74.2 CE steering is definitely slower compared to my ailing M17. I plugged my B7 back into my Sanwa receiver and with the M17 the steering response was more sensitive and faster compared to the NB4. Maybe I messed up somewhere 🤔 Appreciate your response.
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I am using the OTC so in the HW Link V2 app yes I set the BEC from 6.0v to 7.4v. Using Reedy lo pro servo with FGr4D receiver. Also what is the spec of your servo and are you using high speed or high torque?

I’ve never had an issue with servo speeds on any of my vehicles even at 6v.

Same here. At 6.0v my M17 has more servo speed than I can handle. Does not matter what brand ESC or servo. Part of me is reluctant to "have" to go to 7.4v to get my speed back. Maybe I'm imagining things, but with the NB4+ throttle response feels a bit softer and delayed. But that could be due to the difference in the default throttle/brake ratio compared to my M17.
Thanks!
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What I meant to say is i run an nb4 plus also and I’ve never had any issues with speed

Is it an expo setting? Maybe on your old transmitter the steering values were different and the servo would physically turn more from less input. There’s no free lunch - more initial steering expo would mean less later when you fully turn the steering wheel

Try putting the car on a stand and flick the steering. The steering should match and be kinda jittery when you flick the wheel. High latency would show a delay.

Thanks.
Switched to 7.4v but did not notice any appreciable change in servo response...on the bench. Went back to 6v. Changed from 1 way 4 channel to 1 way 2 channel. Counter to what I wrote previously, the other channels stayed hot this time, so my motor fan and transponder were powered up in 1 way 2 channel mode. Did a quick driveway test and the B7 (21.5 blinky) seemed more perky than before. Throttle and steering responses felt very good. Will change my other three buggies to 1 way 2 channel.
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Id change back to 7.4+ voltage. Even if you didn't notice anything.

To answer a previous response, no steering expo on my M17.
On the bench with the BEC set at 6 or 7.4v and servo speed slowed down, releasing the steering wheel on the M17 with cause the B7's front wheels to twitch ultra fast. Steering response is linear and consistent. NB4+ steering with 6 or 7.4v is fast (enough), linear and consistent too...but no twitch or jitter. But, that may not be a negative. I don't need to slow down the servo. Will turn up the BEC to 7.4v as suggested. Looking forward to track time this week. Appreciate all the responses.

What servo are you using? Is it high speed or high torque?

I strongly disagree. When I moved from M17 to NB4 pro + I immediately felt much more precise movement of my xb2 buggy. So much so I even messed up and lost my pace during my club race :cry: Now after some time I feel like I got used to the lower latency and its definitely much faster compared to sanwa. Its so noticeable in high grip carpet racing.