Hi All,
We've just had a customer bring back an X5 for inspection after an emergency landing from approximately 70 centimetres up.
He had to throttle down quickly as nesting birds were about to attack the drone.
Anyway as result of the landing he inspected the gimbal and noticed the components on the yaw axis motor weren't parallel.
Now keep in mind that this wasn't a crash, it was an emergency landing, still operating under power.
I disassembled the yaw axis motor assembly to determine the cause of the misalignment - suspected bent motor shaft initially...
I was astonished to discover the ridiculously small amount of material used to support the entire assembly below the yaw axis motor attachment point to the bayonet assembly plate.
The pictures tell the whole story, but here's the measured numbers for reference.
The weight of the X3 camera is 215 Grams
The weight of the X5 camera is 532 Grams
The weight increase from the X3 to the X5 is 317 Grams or 247% heavier.
The plate which forms the upper part of the motor shaft assembly on the X3 camera is 1.4mm thick - this is cast magnesium, not renowned for it's strength, but used appropriately it should be fit for purpose.
Astonishingly the thickness of the material on the X5 camera gimbal yaw axis motor is 1.1mm
That's a reduction of 30% in actual material thickness - that is supposed to carry an increased load of 247%.
You don't need to be an engineer or qualified in material science to know that the arithmetic just doesn't compute.
Now if the owner hadn't noticed the misalignment, which was very slight indeed, and kept flying this unit, there's every chance that the entire gimbal below the yaw axis plate could have detached in flight.
That's a 500 Gram rock coming down from altitude.
My take on the design of this component of the gimbal makes this unit completely unfit for purpose.
Such a serious design flaw should never have been put into production, in fact it should not have made it past the first prototype.
From DJI's own site:
Zenmuse X5 | DJI
BUILT TO LAST
The Zenmuse X5 is precisely manufactured with high-grade magnesium alloys and aluminium alloys, enabling it to withstand heavy field use.
Compact and lightweight to allow easy transportation and long flight times, the Zenmuse X5 is built to last.
Nothing could be further from the truth, and the above is tantamount to false and misleading advertising.
I'm also sending this to
[email protected], however I have received no responses to any support requests for customer units for several weeks.
I don't anticipate a response from them on this matter.
DJI can ignore this at their peril, because if one of these units falls from the sky as a result of this design flaw and goes through a vehicle windscreen or strikes a person, there will be casualties or even fatalities.
I'd recommend all owners inspect their gimbals as a matter of urgency and contact DJI to demand a strengthened assembly be supplied as soon as humanly possible.
Please feel free to copy and paste this message anywhere that you feel is appropriate
peace out
Glenn
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