2213LikesXray X4
09-12-2023, 09:53 AM - Wikipost
|
|||
|
|||
|
XRAY X4'22 Helpful tips & setups
Tips: Installing the hex on the driveshaft - Make 100% sure you have the flat spot lined up on the axle with the cutout in the hex as shown in the manual. If you do not do this, it will make disassembly so much harder. The flat spot is there so you can fit a flathead screwdriver in between the shaft and the c-clip to pop it off when you want to remove the hex. Also, when removing the c-clip I would recommend pointing it down into your pit mat/towel so the clip does not go flying and disappear. Assembling the upper arms - Make sure to grease the threads on the camber screw (302640). This will make assembly and camber adjustments much easier. Also, when adjusting camber you want to make sure you hold the upper arm so it does not twist while you turn the screw. Droop - It is important to remove the shocks. All team setup sheets will show droop settings with shocks removed. Simply detaching them from the arm will do. This is a change from how we set droop in the past. Setups:
**If the super mods on this forum were actually right, and handled things correctly, they would not have gone back and deleted all the posts to hide things  ***And since they are in the deleting mood now, they might as well go ahead and just delete all the images of the setup sheet, as originally requested via private comms. 
|
04-07-2022, 08:36 PM
#1351
- L is link length
- H is horn length
- y is the vertical difference between the servo spline and the bell crank ball end when the servo horn is vertical
- θ is the servo horn angle (sorry, accidentally transposed θ and Φ between the diagram and the equations)
- d is the distance between the servo spline and bell crank ball end
Let's input some example numbers. θ of 30 degrees in both directions, assuming neutral is vertical. L is 35mm, H is 20mm, y is 15mm. d works out to be 31.62mm at neutral, 42.75mm when the vehicle is turning left, 22.76mm when the vehicle is turning right. That's 11.13mm delta left, 8.86mm delta right, demonstrating that when the horn is vertical at neutral, the left and right motion is asymmetrical.
The above math ignores the fact that the bell crank moves through the z axis, which will change the effective length of L viewed on the x/y plane. This is safe to ignore for demonstration purposes since that movement is symmetrical in both directions.
Last edited by gigaplex; 04-08-2022 at 12:36 AM.
04-08-2022, 12:53 PM
#1356
Comparing both possibilities looks similar to this:
Darkblue and lightblue show right and left with the horn being perpendicular to the link. Movement is not perfectly symmetrical but pretty close. Dark and light orange show right and left movement with the horn being perpendicular to the chassis. The lines depart very soon and the different gradient of the lines also indicates the different speed they have.
Darkblue and lightblue show right and left with the horn being perpendicular to the link. Movement is not perfectly symmetrical but pretty close. Dark and light orange show right and left movement with the horn being perpendicular to the chassis. The lines depart very soon and the different gradient of the lines also indicates the different speed they have.
AT LAST THIS DISCUSSION IS SETTLED NOW
04-08-2022, 02:09 PM
#1357
If I don't win a race, I will blame it on improper optimal servo horn angle positioning. 
04-11-2022, 01:15 PM
#1360
I didn't win my race... but that's because a newer driver drove me right into the wall.
It's on video.
It's on video.
04-23-2022, 05:38 PM
#1362
Found the video -
Last edited by Scott_T; 04-23-2022 at 05:52 PM. Reason: Added video link
04-27-2022, 05:40 AM
#1363
Congratulations to Keven Hebert & the team on the Mod TC win & overall great results at MHIC! Keven's winning Mod TC setup along with Alex Hagberg's podium setup have been added to the wiki at the top of this thread. In case you can't see the wiki, here are the links:
Also, all of the team setup sheets up until MHIC can be found at petitrc: https://site.petitrc.com/reglages/xray/setupx4/
- Keven: https://setup.teamxray.com/sheet/view?userSheetId=20345
- Alex: https://setup.teamxray.com/sheet/view?userSheetId=20340
Also, all of the team setup sheets up until MHIC can be found at petitrc: https://site.petitrc.com/reglages/xray/setupx4/
04-27-2022, 03:13 PM
#1364
Tech Apprentice
if you soak the membranes in brake cleaner for approximately 15 mins, they’ll swell up further, put them on some kitchen/workshop towel to dry out for a few hours. The membranes we’ll return to their original size.
05-02-2022, 02:00 AM
#1365
For me it settles that the perpendicular position is the closest but not the right one. From what I understand the two lines should be superposed, so it means that the ideal position is close to the perpendicular but should be found using the "secret symmetrical steering search" (ensuring that steering angles are identical left and right when EPA is equal).
Am I wrong?
Am I wrong?