I see. Thanks for the tear down. I do wish VEX would add more grease to those gears.
AFAIK it is legal to add more yourself; it has been legal to add grease to the inside of 393s for many seasons.
But my point is this. It is a $10 Cartridge. It doesn’t hurt for the manufacture to add extra grease (maybe thicker type) to the gears.
Just curious, does anyone have some pictures of the brain around the microUSB area? I’m curious as to how strongly they’re held in place.
This is the inner side of the processor board, with connector to the power distribution board:
And this is the top side of the processor board with the connector to LCD:
Also, here are some more pictures of the V5 power distribution board:
Of the special interest are the RS-485 drivers ( http://www.ti.com/lit/ds/symlink/sn65hvd1781.pdf )
Power limiting eFuse chips ( http://www.ti.com/lit/ds/symlink/tps25927.pdf )
And a mystery chip whose datasheet I couldn’t find:
Looks like its the same one/similar as in this ebay listing: https://www.ebay.com/itm/2-PCS-LPC824M201JHI33E-HVQFN33-LPC824M201JHI33-824J-IC-CHIP-/371951985944
Which in turn seems to have this datasheet: https://www.nxp.com/docs/en/data-sheet/LPC82X.pdf
Which would line up with the M0 mentioned in the V5 system Arch:
So it seems like it deals with the triports and making them talk over the internal smart port.
Edit: though it is on the opposite (lateral) side of the board from the triports so maybe not?
Edit 2: and there’s another NXP 824J on the SoC PCB (though once again on the opposite (lateral) side of the PCB from the triports), so two M0s???
Really interesting thread tbh. slightly off topic here, but In terms of the controller, do we know how to use the rumble motor, or will there be an update allowing use for it? I had also considered opening some of the v5 stuff but decided it was not a good idea with the limited availability, so it’s nice to see someone else took the risk lol
AFAIK it is usable in VCS and PROS, and presumably RMS as well.
And yeah, it was kinda risky to do this, but years of pent-up curiosity won out. Won’t be doing it again though (unless something dies).
are we about to see the internals of some new V5 gear?
It is notable that there aren’t places for HS shafts in these motors.
This does make some sense, as since these are half the power of the normal V5 motors, they probably do not need to be used on something that requires a HS shaft.
What are the small motor attached to the PCB board? They look like the science fair ones my school uses that are so underpowered that 2 motors can’t power a cardboard car to climb a 30 degree incline.
The small motor attached is the physical DC motor that powers your robot. the reason it connected to the PCB is that it gives the PWM signals as well as reads the different temp levels and rotations.
You can’t judge a motor by its appearance.
If you disassemble a VEX GO Smart Motor, an IQ Smart Motor, a V5 Smart Motor (5.5 W) and an older 393 Motor, you’ll see that they all appear to use a similar looking and same size DC motor. This is a standard size of DC brushed motor usually referred to as a 130-series motor (from the first three numbers in its part number). However, the GO, IQ, and V5 5.5 W motors all have different mechanical output power values.
The differences in mechanical power output (at a given operating voltage) come from the type and specification of magnets and coil/armature windings inside the DC motor itself. For example, the IQ Smart Motor is only 1.4 Watts output power, while the V5 Smart Motor 5.5 W is 5.5 Watts of output power.
[ missed year old post - but points are more true a year later - did cartridges fail due to lack of “grease”]
Why? If proper amount is just right, why do you think you need to see it to know it is correct amount? Or specifically, what leads you to believe, it is insufficient?
I would understand if you said “for these cartridges to perform for 10 years, we need the ability to add more grease …” or maybe “grease” is the wrong word to be using in modern engineering.
As far as I can tell, lack of “grease” has not been an issue in competition. More likely motors overworked during competitions because structures were out of alignment.
Thanks for the photos! Interesting to see! [ with updates from new motors - confusing but nice]