Evader Rear Chassis Plate (DTXC6978 and DTXC7015 Replacement)

I ended up crashing my truck and it turns out that some parts for this model are getting hard to find especially since…
0
35
0
309
updated February 27, 2022

Description

PDF

I ended up crashing my truck and it turns out that some parts for this model are getting hard to find especially since the manufacturer no longer sells this particular part. I managed to repair my existing part and I already purchased a replacement anyway but I figure parts may be even more difficult to come by in the future. This plate should fit either an Evader ST or an Evader EXT (ST Pro owners, look here: https://www.prusaprinters.org/prints/141237-evader-st-pro-suspension-mounts-and-spacers-dtxc95). It should fit the Brushless Evader but it does not have the wheelie bar mounts. I would recommend printing in nylon if you can though I have been testing with PLA.

This model was created using measurements from DTXC6978, DTXC7015, and DTXC7017 and should replace EITHER of the first two parts. It should fit any model Evader truck, (including the ST, EXT, and the Brushless and possibly even the SCT and buggy models) but it does not have mounts for the wheelie bar. The a-arms will be mounted 3 degrees offset for a slight toe-in. I have no way of accurately measuring the angle on the original EXT plate that I used but the ST plate that I broke was marked "3 degrees" from the factory mold. I can modify the model to change the toe-in by request.

Change log:

V1: Initial Release -- Nothing fits but the gearbox on the PLA printed model since I used an incorrect value for the overall length and then based other measurements off of that.

V1.1: Fixed length of model allowing it to actually be installed on the truck -- PLA printed model does not allow for permanent a-arm installation and may subject the truck to spontaneous disassembly. Hinge pin holes must be drilled out with 1/8" drill bit to remove flat spot on the roof and screws must be forced in (this is not an issue with the model but a physical limitation with my printer).

V1.2: I noticed that the spacing for the A-arms did not allow for installing the e-clip that holds them on so I have moved them back 3.5mm. Additionally, I have enlarged the countersink holes for the motor shield screws as the original holes did not allow the screw to install deep enough. I have adjusted the model to correct for these measurements. -- PLA printed model installs with minor difficulty. I moved the a-arm mounts back a little too far. They work, but the pin has too much travel and this may be a problem.

V1.3: I split the difference for the a-arms since I moved them too far (I probably should have measured the first time instead of just guessing) -- PLA printed model has not yet been installed but will have the same issues as v1.2 with the exception to the a-arms. A-arm mounts are now in the proper location.

V1.4: I have received DTXC7017 in the mail and I measured my chassis mounts against the aluminum part. PLA has enough flex that I never noticed the fractions of a mm that I was off. In addition to adjusting the position (by a mm or two total) of all the chassis screws, I significantly increased the thickness of the part where the screw holds the plate down from 1 mm to 2.25 mm. Longer screws should not be required but strength should be more than doubled. I also enlarged the screw holes to fit an M3 sized screw without having to force it in or drill the part out. -- Part has been printed and tested successfully. I removed and reuploaded with no changes to the model itself.

v2.2: I originally made this part in TinkerCAD. I have since recreated it in Fusion 360. It fits fine. (v2.0 had a typo in the measurements and v2.1 needed some small adjustments to fit without post-print cleanup). This part is symmetrical (unlike the previous versions), has a smaller volume, and should be just as strong. Plus, the model is a lot prettier and now much easier to edit (or get machined...). Uploaded f3d and step files for this model (not available for v1.4 since I made that in TinkerCAD).

The parts I was using for measurements are in far from pristine condition (so I was guesstimating some of the values if they looked funny or weren't square) and it took me a few tries to get it right. The end goal is to get this model CNC'd so it has to be as perfect as possible since metal has much tighter tolerances than plastic. Short term goal is to get v1.4 CNC machined. Part version 1.4 is the final version based off of the original part. There will likely be future revisions that change the original dimensions to account for the structural weaknesses of 3D printed parts.

I have updated the pictures to v1.4. The model fits perfectly on both my EXT and my ST. After I accidentally cartwheeled my ST, the part failed as pictured. I'm completely satisfied with the performance of a part that cost around $0.60 to make.

Category: R/C Vehicles

Tags



Model origin

The author marked this model as their own original creation. Imported from Thingiverse.

License