PCB review items for ECAM02

FlyingLotus1983 commented 9 years ago

[x] Most importantly, we need to add a driver for the 24V pump. This should be done in the same fashion as the solenoid drivers. If you could add another MOSFET and make the 5-pin connector into a 7-pin connector (adding +24V and the switched drain pin), that would let us do this in the same cable. This was something that I forgot during the schematic review, and it's important to add because as of right now we have no way to turn on the pump.
[x] Could you rotate the MPXV5100DP pressure sensor, by 180 degrees? We can't have the barbs sticking out where they are now, because they would interfere with the ballstuds and delta mechanism.
[x] After the sensor is rotated, a bit of PCB material will need to be milled away underneath the barbed fittings of the pressure sensor, because the barb sticks down a bit, and the push-on tubing makes it a bit worse.
[x] Add the barbed fittings to the TDOCU layer of the MPXV5100DP part. This will make it easier to see where we need to do the milling.
[x] J5 should be physically close to the rectangular cutout in the middle of the board, and the connector wiring, when inserted into the male connector, should point towards the opening. This will make wire management easier.
[x] Make J3 a JST PH series male vertical connector that's through-hole. Right now, I think it's an 0.1" offset connector instead of a 2mm offset.
[x] R5 and R6 must be on the same side of the board as the DRV8825.
[x] Add a 0.1 uF decoupling capacitor for U10, U1, U2, U9.
[x] Add a ~100 uF electrolytic cap, near the DRV8825, attached to the 24V rail.
[x] Add a ~10 uF electrolytic cap on the +5V rail,
[x] J4 should be a through-hole, 6-pin, 0.1" connector, instead of a JST connector. Let me know if there's not enough room for this. A right-angle sticking out to the side of the board would be ideal.

Sunday, Oct 11

[x] Route air wire between R6 pin 1 to R1 pin 1
[x] Increase stepper hole to ~~10mm~~ 7mm diameter (the hole at X=56.96, Y=32) (this was put into gh-issues on Friday night, but it seems to be gone now. The 24V comment was blown away as well)

FlyingLotus1983 commented 9 years ago

I updated the description to indicate a 24V pump instead of a 12V pump. Sorry for the confusion.

FlyingLotus1983 commented 9 years ago

@DCSMITH907 , new updates look good, I added one final issue to route air wire between R6 pin 1 to R1 pin 1.. :+1:

DCSMITH907 commented 9 years ago

FlyingLotus1983 commented 9 years ago

Boards have been ordered, closing issue

TinWhiskers / fpd-design

PCB review items for ECAM02 #58