APM2 will not arm the motors until I push the reset button

Here is something confusing to me........ My APM2 will not arm the motors until I push the reset button.

 I use a 7.4v batt through a BEC to power the board. All of my esc's are opto isolated. I run a 5800mah 4s batt for the motors. I have powered the board both ways with or without the jumper through the input and output. The only way I can arm the motors is resetting the APM2 while the batteries are plugged in either by pushing the reset button or unplugging and replugging the APM2.

 Any ideas?

Tags: APM2

Views: 1205

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Replies to This Discussion

Permalink Reply by Michael Utz on March 2, 2012 at 4:03am

i have same thing .... the APM2 seems not to boot up correct until i press the Reset button.


ModeratorPermalink Reply by Graham Dyer on March 2, 2012 at 10:00am

ModeratorPermalink Reply by Graham Dyer on March 2, 2012 at 10:00am
Permalink Reply by Randy Ram on March 2, 2012 at 5:59pm

I just finished calibrating the esc. The motor ran after I calibrated it. Somehow, now I can't arm the APM2. Is there anything I need to do on the Mission Planner before I can use it? I followed the guide and it said something about a FLY mode switch. Where is that on APM2?

Permalink Reply by JP on March 2, 2012 at 7:27pm

Try this.. I am been doing this stuff all day!! :D

1. Take the props off

2. Plug the APM2 in via USB - connect

3. Calibrate your Radio

4. Put the throttle in high position 

5. Unplug usb

6. Plug In Battery

7. Lights on APM2 will Cycle (leave throttle high) wait til all the beeps

8. Disconnect Battery

9. Plug In Battery 

10. Lights on APM2 will Cycle (leave throttle high) wait til all the beeps

11. Move throttle to lowest

12. Confirmation beeps

13. Unplug battery

14. Turn off TX

arming

(props off)

1. Turn on TX

2. Turn on Quad

3. Arm motors (lowest + right) watch leds. motors should arm. 

Test

4. give a little throttle to test

disarming

1. Disarm motors (lowest + left)

2. Unplug Quad Battery

3. TX off

Don't turn tx off before quad! 

something apm2 won't boot with certain ESC apparently. if this is the case boot with usb power first, then try to hook up battery. disconnect usb and arm

Run motors command to double check outputs. :D Hope this helps, I am not flying yet. Still on hand tests/preflight with some issues I think. 

Permalink Reply by Randy Ram on March 2, 2012 at 9:37pm

Do you have to do that all the time?

Permalink Reply by JP on March 2, 2012 at 9:57pm
i dont think so, i do it anytime i change radio settings. also the big thing was having
the tx on before power up. i just read another thread saying you should make sure
yaw is 1500 when centered in radio cal. also set the other controls to the same. i had to
use trim on my tx and then re cal the escs. testing tomorrow
Permalink Reply by Randy Ram on March 2, 2012 at 10:04pm

ok, will check on the 1500 on the yaw. My lowest point seems to be 1100 and high about 1900 on my Futaba with 100% travel. Should I be lower then 1000 and the min and about 2000 at the max?

Permalink Reply by JP on March 2, 2012 at 10:09pm
that seems good. i have futaba too. i mean, adjust the trim in all channels
so it is 1500 when centered. i just read that on another thread. seems
logical. this applies more so to flying and getting the quad stable

regarding apm2, i thought i had the usb boot issue until i did all the
steps above and had my tx on -- throttle lowest before apm2 power up
hope that helps
Permalink Reply by Randy Ram on March 3, 2012 at 8:15pm

ok, this morning I went ahead and retried the arming without doing any changes yet. But this time, I took my time and held yaw right for little longer till I saw the blue/red light changed its blink sequence. I knew now it was ready. I tried it out, and the throttle worked fine. I have tried it for a few times and its working. Removed the batt and tried again. Still working. So, the problem was me not giving the APM2 enough time to arm.

Permalink Reply by Eddie Weeks on March 3, 2012 at 6:11am

I have the same problem...  APM2 will not arm the motors... Some time I get solid blue light

Some times I get normal lights but still no arming..

This Fix works every time, for me...

Unplug the tail servo on my tri copter...   Boots fine... test motors.. plug in tail servo... go fly..

btw... I have 5 amp BEC and 5.2 volts, measured all the time..

Eddie Weeks

Permalink Reply by Eddie Weeks on March 3, 2012 at 9:48am

correction...   APM2 arms the ESC sometimes... Has nothing to do with the tail servo.. !!

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