Thingiverse
Mavic Pro Legs by SimPer123
by Thingiverse
Last crawled date: 3 years ago
DJI Mavic Pro Landing Gear
Suggest you keep checking back once a week as I will be uploading variations and tweaks regularly as I think of them or if design changes are made !
Update 15/06/2017 - Added Sand Pads
Update 16/06/2017 - Few duplicate STL files seemed to have uploaded. Fixed them now. Suggest anyone who downloaded prior to today, download again !
Update 19/06/2017 - Modified 30mm and 50mm front and rear legs "Sand" Pads
06/07/2017- Recommend change to rear leg bases print orientation
See bottom for more detail
Summary of parts;
Four versions of the front legs (Domed, Flat and two sizes of flat pads)
Four versions of the Rear Legs (Domed, Flat and two sizes of flat pads)
Only one set of the rear mounts are needed (L&R) as they accept dovetailed versions of the rear legs.
The screen shots from Simplify3D show the best orientation I found for the parts and the support material for the best quality print. The dovetails need to be parallel to the build plate for accuracy and fit.
Couple of cautions
If your slicer supports multiple processes, it is recommended when printing the dove tail legs that the dovetail + 2mm is printed at 100% infill for strength. I have included a picture to clarify. I use Simplify3D and this supports multiple processes/Infills. Not sure about other slicers. The balance can be 20-25% to save weight or print the whole object at 100% if desired or your slicer cannot vary the infill.
Support material is a MUST. Yes there is a lot, but for accuracy and print quality/strength the dovetails need to be on the build plate, so the supports need to be there for to support the dome printing. This results in the best dovetail and dome print quality.
Not sure of the accuracy of your printer, but you may need to do some sanding on the dovetails/domes. I use a Flash Forge Creator Pro with Flexion Extruder's and the fit was perfect. They are tight enough to hold securely but can be removed with care.
Tips
If you are finding it hard to remove or insert the dovetails legs, use some Windex or Iso Propyl Alcohol (IPA) to lubricate the Dove Tail joints when inserting or removing the legs. DO NOT FORCE or you risk snapping the dovetail off the leg.
The Dovetail bases can be left attached to the Mavic, but you will need to remove the legs if you have a custom case of course !
Design Notes
The rear leg mounts were designed to move the legs as close to the Mavic body to reduce torsional loading on the rear arm hinge on landing but still maintain stability on landing be it dirt, sand or grass etc.
Even though it would have been far easier to have the legs directly below the motors, I felt that this would put undue stress on the rear arms pivot points. There may be a V2 coming soon :)
Printing Notes
PLA was used and tested. ABS or other plastics could be used, but due the shrinkage you may have problems with the dovetails or fitting the parts to the Mavic. You could try to compensate for the shrinkage, but I foresee lots of wasted prints !
To Come
I will upload more photos in the next few days and different versions of the feet. One set I am working on is pivoting feet/skids at the bottom of the legs, but I need to test for oscillations that could be generated by the down wash of the props......
Since I purchased the combo kit, I have lots of bits and pieces floating around (Spare props, RC cables, Battery to USB convertors etc), so I am in the process of designing a box to hold all these parts so I don't lose them. If you are in the same dilemma, any suggestions for other compartments to add to the design would be welcome so please leave this in the comments !
Updates
15/06/2017
Added both Front and Rear legs with 30mm and 50mm pads more suitable for landing on fine dirt or sand (Or Snow ?). Added pictures showing recommended print orientation.
16/06/2017
Re-ordered the STL files to group front legs and then and rear legs one after the other
19/06/2017
Made changes at the join from the 30mm and 50mm pads to legs as I had the pads break away from the legs due to insufficient material joining the two. Much "Beefier" now !
06/07/2017
Recommend change to rear leg bases print orientation. This is due to the latches weakness and breaking where it meet the base structure since the strength only came from the layers. When printed in the new orientation, the join is much stronger since the filament is now printed perpendicular to the join i.e. The hinge point is now filament. Much stronger ! See the new pictures for a better explanation !
Suggest you keep checking back once a week as I will be uploading variations and tweaks regularly as I think of them or if design changes are made !
Update 15/06/2017 - Added Sand Pads
Update 16/06/2017 - Few duplicate STL files seemed to have uploaded. Fixed them now. Suggest anyone who downloaded prior to today, download again !
Update 19/06/2017 - Modified 30mm and 50mm front and rear legs "Sand" Pads
06/07/2017- Recommend change to rear leg bases print orientation
See bottom for more detail
Summary of parts;
Four versions of the front legs (Domed, Flat and two sizes of flat pads)
Four versions of the Rear Legs (Domed, Flat and two sizes of flat pads)
Only one set of the rear mounts are needed (L&R) as they accept dovetailed versions of the rear legs.
The screen shots from Simplify3D show the best orientation I found for the parts and the support material for the best quality print. The dovetails need to be parallel to the build plate for accuracy and fit.
Couple of cautions
If your slicer supports multiple processes, it is recommended when printing the dove tail legs that the dovetail + 2mm is printed at 100% infill for strength. I have included a picture to clarify. I use Simplify3D and this supports multiple processes/Infills. Not sure about other slicers. The balance can be 20-25% to save weight or print the whole object at 100% if desired or your slicer cannot vary the infill.
Support material is a MUST. Yes there is a lot, but for accuracy and print quality/strength the dovetails need to be on the build plate, so the supports need to be there for to support the dome printing. This results in the best dovetail and dome print quality.
Not sure of the accuracy of your printer, but you may need to do some sanding on the dovetails/domes. I use a Flash Forge Creator Pro with Flexion Extruder's and the fit was perfect. They are tight enough to hold securely but can be removed with care.
Tips
If you are finding it hard to remove or insert the dovetails legs, use some Windex or Iso Propyl Alcohol (IPA) to lubricate the Dove Tail joints when inserting or removing the legs. DO NOT FORCE or you risk snapping the dovetail off the leg.
The Dovetail bases can be left attached to the Mavic, but you will need to remove the legs if you have a custom case of course !
Design Notes
The rear leg mounts were designed to move the legs as close to the Mavic body to reduce torsional loading on the rear arm hinge on landing but still maintain stability on landing be it dirt, sand or grass etc.
Even though it would have been far easier to have the legs directly below the motors, I felt that this would put undue stress on the rear arms pivot points. There may be a V2 coming soon :)
Printing Notes
PLA was used and tested. ABS or other plastics could be used, but due the shrinkage you may have problems with the dovetails or fitting the parts to the Mavic. You could try to compensate for the shrinkage, but I foresee lots of wasted prints !
To Come
I will upload more photos in the next few days and different versions of the feet. One set I am working on is pivoting feet/skids at the bottom of the legs, but I need to test for oscillations that could be generated by the down wash of the props......
Since I purchased the combo kit, I have lots of bits and pieces floating around (Spare props, RC cables, Battery to USB convertors etc), so I am in the process of designing a box to hold all these parts so I don't lose them. If you are in the same dilemma, any suggestions for other compartments to add to the design would be welcome so please leave this in the comments !
Updates
15/06/2017
Added both Front and Rear legs with 30mm and 50mm pads more suitable for landing on fine dirt or sand (Or Snow ?). Added pictures showing recommended print orientation.
16/06/2017
Re-ordered the STL files to group front legs and then and rear legs one after the other
19/06/2017
Made changes at the join from the 30mm and 50mm pads to legs as I had the pads break away from the legs due to insufficient material joining the two. Much "Beefier" now !
06/07/2017
Recommend change to rear leg bases print orientation. This is due to the latches weakness and breaking where it meet the base structure since the strength only came from the layers. When printed in the new orientation, the join is much stronger since the filament is now printed perpendicular to the join i.e. The hinge point is now filament. Much stronger ! See the new pictures for a better explanation !
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