Another "no throttle" problem

Hi all,

I'm having a similar problem to what has been posted before, and tried the solutions posted (as far as I can tell) to no avail. I'm running 2.6 on the blue shield with XY and Z IR sensors and pitot tube installed with a Spektrum DX6i Tx and running power off the ESC (no separate battery). All controls, including throttle, work fine in manual mode. When I flip to Stabilize, I get no motor action. Other controls work fine and the IR responds as expected. Here is the serial monitor log from that... you can see the ch3_in go up, but nothing happens:

###STABILIZE 1***

+++ASP:0,THH:0,RLL:7,PCH:-14,ch3_in:957,***

!!!LAT:40312635,LON:-83100942,SPD:0.0900000000,CRT:31.0000000000,ALT:297,ALH:0,CRS:175,BER:115,WPN:1,DST:-1,BTV:0.0000000000,RSP:-0.0466801834,TOW:0,***

+++ASP:0,THH:0,RLL:11,PCH:-13,ch3_in:1020,***

+++ASP:0,THH:3,RLL:11,PCH:-13,ch3_in:1116,***

+++ASP:0,THH:15,RLL:11,PCH:-13,ch3_in:1206,***

+++ASP:0,THH:27,RLL:13,PCH:-13,ch3_in:1305,***

+++ASP:0,THH:41,RLL:12,PCH:-14,ch3_in:1414,***

+++ASP:0,THH:54,RLL:12,PCH:-14,ch3_in:1523,***

+++ASP:0,THH:67,RLL:12,PCH:-14,ch3_in:1626,***

+++ASP:0,THH:81,RLL:11,PCH:-13,ch3_in:1733,***

+++ASP:0,THH:90,RLL:12,PCH:-12,ch3_in:1808,***

!!!LAT:40312631,LON:-83100943,SPD:0.0700000000,CRT:37.0000000000,ALT:299,ALH:0,CRS:175,BER:115,WPN:1,DST:-1,BTV:0.0000000000,RSP:-0.0670799970,TOW:0,***

+++ASP:0,THH:96,RLL:13,PCH:-13,ch3_in:1853,***

+++ASP:0,THH:95,RLL:12,PCH:-14,ch3_in:1852,***

+++ASP:0,THH:88,RLL:12,PCH:-14,ch3_in:1791,***

+++ASP:0,THH:74,RLL:11,PCH:-13,ch3_in:1683,***

+++ASP:0,THH:56,RLL:11,PCH:-13,ch3_in:1533,***

+++ASP:0,THH:31,RLL:13,PCH:-13,ch3_in:1337,***

+++ASP:0,THH:11,RLL:11,PCH:-13,ch3_in:1179,***

+++ASP:0,THH:0,RLL:13,PCH:-13,ch3_in:1085,***

+++ASP:0,THH:0,RLL:11,PCH:-13,ch3_in:1030,***

+++ASP:0,THH:0,RLL:13,PCH:-13,ch3_in:999,***

+++ASP:0,THH:0,RLL:12,PCH:-14,ch3_in:981,***

!!!LAT:40312629,LON:-83100943,SPD:0.1500000000,CRT:36.0000000000,ALT:300,ALH:0,CRS:175,BER:115,WPN:1,DST:-1,BTV:0.0000000000,RSP:-0.0736183166,TOW:0,***

+++ASP:0,THH:0,RLL:13,PCH:-13,ch3_in:970,***

+++ASP:0,THH:0,RLL:11,PCH:-13,ch3_in:964,***

+++ASP:0,THH:0,RLL:12,PCH:-14,ch3_in:959,***

+++ASP:0,THH:0,RLL:11,PCH:-13,ch3_in:959,***

###MANUAL 0***

Same thing in Fly-by-wire-B mode... ch3_in goes up, but no motor action:

###FLY BY WIRE B 2***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:960,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:959,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:960,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:1041,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:1208,***

!!!LAT:40312659,LON:-83100885,SPD:0.2700000047,CRT:14.0000000000,ALT:313,ALH:0,CRS:175,BER:115,WPN:1,DST:-1,BTV:0.0000000000,RSP:-0.0866400051,TOW:0,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:1437,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:1633,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:1748,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:1816,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:1855,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:1847,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:1788,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:1670,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:1489,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:1295,***

!!!LAT:40312659,LON:-83100882,SPD:0.1800000095,CRT:13.0000000000,ALT:313,ALH:0,CRS:175,BER:115,WPN:1,DST:-1,BTV:0.0000000000,RSP:-0.0866400051,TOW:0,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:1154,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:1073,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:1025,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:997,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:980,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:971,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:966,***

###STABILIZE 1***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:961,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:959,***

!!!LAT:40312658,LON:-83100877,SPD:0.0399999980,CRT:17.0000000000,ALT:314,ALH:0,CRS:175,BER:115,WPN:1,DST:-1,BTV:0.0000000000,RSP:-0.0870789432,TOW:0,***

+++ASP:0,THH:0,RLL:14,PCH:-14,ch3_in:959,***

###MANUAL 0***

I'll attach the .h file I'm using.

I tried adding mux4 pins and moving the wire. Again, throttle response in manual is fine, but nothing in Stabilize or Fly-by-wire-B. I checked continuity between the mux and input, mux and output, and arduino (or is it atmel?) and output, and they're all fine. I'm out of guesses, unless it is a power problem from running off the ESC.

Any ideas?

Robs_EasyStar_header.h

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Developer

Jason Short June 19, 2010 at 10:13pm

Try the latest code in the repository and move your throttle jumper to Pin 11.
Change your header to specify that you want THROTTLE_IN to be 11 instead of 13.

Good luck,
Jason
Developer

Jason Short June 17, 2010 at 6:33pm

There is a zip file called test suite in the downloads:
http://code.google.com/p/ardupilot/downloads/list

Try the throttle test. Just use the included header and load it up.
It will print ch3_in and ch3_out.

You could skip the mux and wire it directly to your servo to see if the mux is bad.

Jason
Developer

Doug Weibel June 17, 2010 at 4:45pm

Using the airspeed sensor and CRUISE_AIRSPEED 0 will produce no throttle in FLY_BY_WIRE_B.

But if you have no throttle in STABILIZE you may have a hardware problem. Look at the telemetry you posted. You can see that in FLY_BY_WIRE_B the throttle value is always zero due to trying to get down to a zero speed. However in the STABILIZE data you can see that it is trying to give you non-zero throttle values.... You could have a problem with the multiplexor. They are known to be a bit sensitive (to electrostatic discharge, etc.) One as mine developed a bad throttle channel which i fixed by rewireing through channel 4
Darren June 16, 2010 at 8:53pm

have you adjusted airspeeds?
#define CRUISE_AIRSPEED 0 // If we have airspeed sensor pitch is used to maintain desired airspeed and throttle is used for climb/descent

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Another "no throttle" problem

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