Yeah turns out keeping it on a shelf in my basement for two years didn’t do it any favours.
I have some fresh stuff on order to do the imu’s.
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I grabbed the IMU with tweezers and mounted them one at a time in my little panavise with pads sticking up. I used an X-acto to spread a TINY amount of solder paste - aiming to really get light but complete coverage around the edges.
Then I remove them from the vice with tweezers and place them on the board. I then line them up very carefully with the tip of the X-acto.
Once the IMU is sitting on the board, I mount the board in the Panavise by its edge. This lets me hold the board horizontally - extended out over the edge of my desk. Then I approach if from underneath with the hot-air.
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Just an heads up to others. JLC soldered my D6 shottkys the wrong way. I figured that out when my first board didn’t power up.
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Thanks Georg,
Hope they did it right with the 50pcs i ordered. It looks good on the corrected placement image.
Really not in the mood to turn around 50 diodes 
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Yours seems to be corrected “correctly”
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Where do I find in their website how they corrected my order? Just placed mine yesterday.
Order History -> [DFM Analysis]
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Thanks, found it.
Guys, what is the recommended thickness of the thermal pad you use?
1mm, its all in the how-to:
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Turns out I rushed to blame my expired solder paste.
All my boards have D6 flipped.
A bit of soldering later and I have success.
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Uh oh…
So this is the second time this has been reported. Sounds like I need to make a JLCPCB-specific position file.
They don’t use the IPC standard position format but have always seemed to figure it out in the DFM review…until now
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Yeah probably worth making a custom file so they get it right every time.
On a side note my father commented that the vias on the SLJ graphic look like bullet holes.
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When I don’t have a solder paste stencil, or fresh paste as in your case. I find it is easier to pre-tin the pads with good solder and add dab flux to hold the smt components in place for reflowing. Apply heat, done.
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@shaman why does vesc tool mobile say it can’t read fw? Does it need offical vesc firmware to work with the mobile app, or does @rpasichnyk have to add CFOC2 to metr compatibility list first? It works on pc over usb just fine
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I’m betting it’s a mismatch of the app version and the FW version.
For the laptop app, none would talk to the FW marked “latest”. VESC-Tool 2.06 would talk to FW 5.01.
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youtube video incoming?
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Yes bro. I’m waiting on an ST link which wont be here until end of next week but yup essentially aiming to do a really nice video as I am a big fan of @shaman and what he is doing for our community. I’ll be interviewing him too, I want to try and raise awareness of what he is trying to achieve with these projects.
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Might be nice on the next FOCer to have a solder pad (or button) to pull up boot0 so you can flash in DFU mode. Then the stlink isn’t necessary unless you are debugging firmware.