LP5DSM Transmitter is all backwards with my MCX

[Steve Joblin]

I purchased a CX/2 a few weeks ago and have been having a blast! My wife just bought me a MCX as a birthday present (she got the last one at the LHS!)... ain't she a sweetie! I would have rather gotten a T-Rex 500, but hey, beggers can't be choosers :)

Any way, I was able to easily bind my LP5DSM transmitter that came with my CX/2 to the MCX with no problems... well one problem... everything is backwards!

Moving the Rudder stick left increases the speed of UPPER rotor (it should increase the lower rotor)
Moving the Rudder stick right increases the speed of the LOWER rotor (it should increase the upper rotor)

Moving the Elevator stick forward makes the right hand servo pull the swashplate UP (it should make it go down)
Moving the Elevator stick backwards makes the right hand servo push the swashplate DOWN (it should make it go up)

Moving the Aileron stick left makes the left hand servo pull the swashplate UP (it should make it go down)
Moving the Aileron stick right makes the left hand servo pull the swashplate DOWN (it should make it go up)

It seems that I need to reverse/change the direction of operation of the flight controls. How do you change these on a LP5DSM?

[Nitromethane]

You need to switch the DIP switches on your TX.Make sure to mark down where they are now so you will remember them when you put them in the original spots to fly your CX.



1 - Aero(off) Heli(on)
Heli - 6ch becomes extra AIL,
Aero - 6ch becomes pitch
which need extra mod to use properly,
but I don't think I need to modify that
because most of new helis use CCPM instead)
2 - CCPM (For Heli, using ch6)
3 - ELE->RUD mix (For Aero, only work either 3 or 4, not both)
4 - ELE->AIL mix (For Aero, only work either 3 or 4, not both)
5 - THR Reverse
6 - AIL Reverse
7 - ELE Reverse
8 - RUD Reverse
9 - 5ch Reverse
10 - 6ch Reverse

[Steve Joblin]

My gosh! it took less than 10 minutes to get a thorough and detailed response! You guys are the best! if I could send you a beer through the Internet, I would (hope your 18!):YeaBaby:

Thanks so much! Exactly what I needed... all is working perfectly!!!!

I am having such a fun time with this hobby, and a lot of it is because of the support and friendship here! :hug:

[Nitromethane]

And I'm even a new guy...lol.It's too bad that doesn't happen more often in forums.

[theLane]

Umm... how do you bind this CX2 radio to the mCX?

[fireup]

Umm... how do you bind this CX2 radio to the mCX?

It auto-binds just power your Tx first and then the mCX, and make sure the throttle is at the low position.

[theLane]

Got it. Had to reverse a few controls, but works great. Thanks

[shaggybirdman]

It auto-binds just power your Tx first and then the mCX, and make sure the throttle is at the low position.

heli first then the radio i do believe. the cx2 tx goes into bind mode every time you turn it on. the trim needs to be at no higher than half, or all the way down. push it up till the blades start to spin then down just enough to stop them. extra power with little or no loss of flight times.

[theLane]

I got the BNF and bound it to my LPDSM transmitter from the BCX2. The forward cyclic is NO where near as much as the demo in the store or my buddies. I wonder if it's the LPDSM transmitter? Is there something I could do with this tx to make the heli responsive like the tx that comes with the RTF version? Has anyone else experienced this?

Forward and reverse are the same... SLOW. Doesn't the RTF tx have a switch in the right stick that you can PUSH in/down and this makes it a lot more responsive? Push the stick itself down.

[shaggybirdman]

Doesn't the RTF tx have a switch in the right stick that you can PUSH in/down and this makes it a lot more responsive? Push the stick itself down.

yes it does, but that puts it into low rate. it starts out in high rate. turn in the right side (passenger side/starboard) link in 1 turn at a time. the lhs mcx has 6 turns in, but i haven't seen it fly. there is a mod out to increase forward flight speed. i got the parts, but have yet to start the mod.

[theLane]

Oh. My buddy said his was in low rate by default. Maybe this one is in low-rate and because I am using the LPDSM transmitter, I can't switch it from low-rates? (hmm, that's a radio setting)


I adjusted the linkage on the driver side 4x and it flies like my Vibe 50 now :)

[shaggybirdman]

do this then. fly it with the cx2 tx, and note the ff speed. rebind to the stock tx, and see what it does. goto page 23 first line "when the tx is first powered on it will be in high rate mode." so i'd assume (yes that can be a bad thing) with the cx2 tx it's in high rate, but it isn't the stock radio, so who knows.

i think i'll try it too. ya got me curious. i only have 1 turn in on my servo.

[theLane]

Hmm... I am curious too. I don't have a stock radio so I can not test it.

[shaggybirdman]

i'll try it now, and report back.

[TheBum]

I just got a BNF today and after reversing AIL, ELE, and RUD on my LP5DSM, the controls are all correct. I would agree that it's awfully sluggish compared to my CX2. I'll have to try setting up a model on my DX7 to see how much better response I can get. It would still be nice to find a setting on the LP5DSM that would work so that I don't have to drag out my DX7.

[shaggybirdman]

it's much better with the cx2 tx. now to try it with my dx7 :thumbup:

[TonyJ]

Nitromethane - you are a life saver. Until I saw your post I was trying all different configurations. I have settled on the following DIP switch settings:

1, 4 & 8 on
2, 3, 5, 6, 7, 9 & 10 off.

[TheBum]

What do 1 and 4 do? I know flipping 8 on reverses the rudder and flipping 6 and 7 off un-reverses the aileron and elevator.

[Nitromethane]

Nitromethane - you are a life saver. Until I saw your post I was trying all different configurations. I have settled on the following DIP switch settings:

1, 4 & 8 on
2, 3, 5, 6, 7, 9 & 10 off.

lol..Don't know about that but thanks..I was merely stating what I knew of it..I recently had configured my lp5dsm for my Sports Spree airplane and had to learn the dips for myself.
Glad it helped.

[Steve Joblin]

Per Nitromethane's post above...

1 - Aero(off) Heli(on) Heli - 6ch becomes extra AIL, Aero - 6ch becomes pitch which need extra mod to use properly,but I don't think I need to modify that because most of new helis use CCPM instead)
2 - CCPM (For Heli, using ch6)
3 - ELE->RUD mix (For Aero, only work either 3 or 4, not both)
4 - ELE->AIL mix (For Aero, only work either 3 or 4, not both)
5 - THR Reverse
6 - AIL Reverse
7 - ELE Reverse
8 - RUD Reverse
9 - 5ch Reverse
10 - 6ch Reverse

If I am reading this correctly, it looks like 4 controls the Elevator/Aileron mix, which I assume means that setting 4 to "on" would impact the forward speed? I'll give it a try tonight and report back if changing the the "4" setting has any impact.

[TheBum]

Sorry, I just didn't scroll up far enough.

I always thought the LP5DSM was a 5-channel TX. So, it's actually a 6-channel?

[Steve Joblin]

Just got some free time and experimented a bit with setting "4". Has anyone else given it a try? I don't see any difference in having "4" on or off... I guess it has no effect on the mCX?

[shaggybirdman]

i forget where i saw it but there is a list showing what each dip switch is for. let me check my cx2 manual.

brb

found it on another forum

1 - Aero(off) Heli(on)
Heli - 6ch becomes extra AIL,
Aero - 6ch becomes pitch
which need extra mod to use properly,
but I don't think I need to modify that
because most of new helis use CCPM instead)
2 - CCPM (For Heli, using ch6)
3 - ELE->RUD mix (For Aero, only work either 3 or 4, not both)
4 - ELE->AIL mix (For Aero, only work either 3 or 4, not both)
5 - THR Reverse
6 - AIL Reverse
7 - ELE Reverse
8 - RUD Reverse
9 - 5ch Reverse
10 - 6ch Reverse

[Nitromethane]

Some people write comments without actually reading the thread....:noteworthy

[shaggybirdman]

no i read it, but found it on another forum.

http://www.rcgroups.com/forums/showthread.php?t=728078

i hope the mods don't edit this.