DJI WooKong-M Autopilot System for multirotors **Owners Thread** - Page 1125 - RC Groups
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Feb 05, 2013, 09:16 AM
Registered User
Quote:
Originally Posted by Psionic001
One or more motors are not vertical, inducing a yaw. The two opposite motors of your quad that heat up are spinning much harder to fight that yaw.

Straiten your motors and they will cool down.
I checked the motors but they are almost perfectly vertical, I cannot see any visible relevant angle with the vertical axes of all motors.
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Feb 05, 2013, 09:27 AM
I never finish anyth
Is it perfectly balanced?
Feb 05, 2013, 12:04 PM
Registered User
dont know if this is of any help but I was reading way back in this thread of an issue with some of the software versions that were causing some of the motors/esc to overheat and causing crashes.
Feb 05, 2013, 02:23 PM
Registered User
Quote:
Originally Posted by Psionic001
One or more motors are not vertical, inducing a yaw. The two opposite motors of your quad that heat up are spinning much harder to fight that yaw.

Straiten your motors and they will cool down.
I'd have to agree with you too. On my MK hexa, all the CCW motors were running warmer then the CW motors. One motor was slightly off vertcal. I just shimmed it up level and now they are all about the same temp.
Feb 05, 2013, 04:15 PM
Registered User
crashtested's Avatar
Can someone with ground station software CD PM me a URL of the download link on the cd? I have contacted DJI, but no response.
Feb 05, 2013, 05:56 PM
Registered User
As far as I know, There is no internet download of the ground station software. You have to get it from the CD.
Feb 05, 2013, 06:15 PM
Morning Light Mountain
badbill's Avatar
Quote:
Originally Posted by crashtested
Can someone with ground station software CD PM me a URL of the download link on the cd? I have contacted DJI, but no response.
This is the 64bit, maybe not the newest?

Bill Davenport
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Feb 05, 2013, 06:18 PM
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hadawayj's Avatar

DJI iOSD MarkII upgrade


Anyone have anymore information on upgrading the DJI iOSD to a Mark II?
Feb 05, 2013, 06:27 PM
Registered User
pokmon's Avatar
Quote:
Originally Posted by hadawayj
Anyone have anymore information on upgrading the DJI iOSD to a Mark II?
Read post number 16807 on https://www.rcgroups.com/forums/show...6386&page=1121
Feb 05, 2013, 09:17 PM
DJI Support - 107 Certified
Tahoe Ed's Avatar
A whole thread on the iOSD MK I and MK II just for you:

https://www.rcgroups.com/forums/show....php?t=1738864
Feb 06, 2013, 06:22 AM
Registered User

motors overheating


Quote:
Originally Posted by Buffythesaint
I'd have to agree with you too. On my MK hexa, all the CCW motors were running warmer then the CW motors. One motor was slightly off vertcal. I just shimmed it up level and now they are all about the same temp.
I tweaked with motors, trying to put them as vertical as possible, doing very small movements to one side or the other and the result now is that the motors 2 and 4, on the other axis, are overheating, while before were motors 1 and 3.
So it really seems that this could be the reason of my motor's overheating.
What I cannot understand is that I have used the quadcopter many times and never had to be so precise to align the motors vertically because of overheating them.
I will do other tries.
Feb 06, 2013, 06:55 AM
Registered User
Quote:
Originally Posted by archet
I tweaked with motors, trying to put them as vertical as possible, doing very small movements to one side or the other and the result now is that the motors 2 and 4, on the other axis, are overheating, while before were motors 1 and 3.
So it really seems that this could be the reason of my motor's overheating.
What I cannot understand is that I have used the quadcopter many times and never had to be so precise to align the motors vertically because of overheating them.
I will do other tries.
Make sure that each one of the CW and CCW motors are slightly offest(maybe 3-5 degrees) so that the resulting sideway thrust(from the tilt) supports their yaw command. For example a CW motor rotates the copter CCW if it spins faster than all other motors, tilt that motor slightly so the resulting thrust vector in the horizontal direction pushes the frame in the CCW direction. I use a magnetic angle locator like this one http://www.acehardware.com/product/i...ductId=1285951 to align all motors within 1-2 degrees but having them tilted in the right direction compensates for any angle measurement differences.

The problem I face is always with my coaxial setups where each arm becomes torque neutral which would imply the need to tilt each motor on the same arm in a different direction...the mikrocopter site has a small shim that can be used to achieve that but I've never used it and instead created a custom motor mix for the WKM to allow motors on each coaxial arm to spin in the same direction. There are of of course disadvantages of having the coaxial props spin air in the same direction but the props I use don't suffer from that.
Feb 06, 2013, 07:13 AM
Psionic001's Avatar
Hmmmm, its strange they are so sensitive.

Line up adjacent prop tips to ensure that the actual motor shaft is vertical, regardless of how it might look with a visual inspection. Looks can be deceiving depending on whats mounted on the copter. Hope that makes sense.

Also, a longshot, but I guess your if your yaw gains are a bit on the high side then it could become overly sensitive to a slightly offset motor. My Yaw gains normally run somewhere around 130-140 (on an octa)

Cheers

Matt

Quote:
Originally Posted by archet
I tweaked with motors, trying to put them as vertical as possible, doing very small movements to one side or the other and the result now is that the motors 2 and 4, on the other axis, are overheating, while before were motors 1 and 3.
So it really seems that this could be the reason of my motor's overheating.
What I cannot understand is that I have used the quadcopter many times and never had to be so precise to align the motors vertically because of overheating them.
I will do other tries.
Feb 06, 2013, 08:11 AM
Registered User
pokmon's Avatar
Quote:
Originally Posted by IconFlyer
...the mikrocopter site has a small shim that can be used to achieve that
...
Did you have a link ?

Thank you
Feb 06, 2013, 08:37 AM
DJI Supporter
Sid3ways's Avatar
Quote:
Originally Posted by pokmon
Did you have a link ?

Thank you
http://www.quadrocopter.com/Motor-an...ter_p_263.html


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