DIY 4ms SMR

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markelm
Learning to Wiggle
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Just finished mine!

Post by markelm » Mon May 27, 2019 11:28 am

Just finished mine! Thanks to everyone, reading this thread was very useful!

Does anybody know if the module needs any kind of calibration?
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nosamiam
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Re: Order

Post by nosamiam » Sun Nov 03, 2019 5:05 am

rthorntn wrote:
Has anyone just done say all 114 of the 1K resistors one after the other and then moved on to all of another value?

Any other tips?
.
I haven't looked at the docs yet (I'm at work) so I don't know this particular build but I've done quite a bit of SMD modules.

Like danielanez is doing, the smartest way to go if you have the patience is to solder the power components first. Make sure nothing is smoking or getting too hot. I like to cycle it on for just a second or two and then back off first with good lighting and check for smoke/bad smell. You can sometimes save components if you can catch a fault before something fails. If everything passes the on-off test, check voltages with DMM.

Then solder the SMT and whatever header is required to load the firmware. That way you can make sure the SMT is properly aligned and working properly before you add a bunch of components around it that make it hard to mess around with.

Once that is done you can add other ICs for the same reason: it's hard to realign them if the board has a bunch of other parts. Again, use the DMM to check supply voltages.

Then follow up with all the remaining resistors, caps, diodes, etc. At this point I will sometimes also solder maybe the output jack and a pot or two to try and test basic functionality. Depends on the module; sometimes you can do this, sometimes you can't. But you don't want to load up all the jacks, pots, and LEDs and then find out it doesn't work. It's a lot harder to inspect, troubleshoot, and desolder with all that stuff populated. But sometimes you don't have much choice.

That's my basic order of operations

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Staticcharge
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Re: DIY 4ms SMR

Post by Staticcharge » Mon Feb 10, 2020 12:34 pm

I don't know if this iBOM makes this build any easier for folk:
SMR iBOM.rar
Let us know if it's of use as it may help others decide whether to build it or not. With such a price tag on the parts I would think it's a bit of a gamble for some so I hope the iBOM helps.
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Staticcharge
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Re: DIY 4ms SMR

Post by Staticcharge » Sun Feb 16, 2020 2:33 pm

Well the build was straight forward enough using the iBOM, took a little under 5hrs from start to finish with only one issue along the way....The 12/5v jumper...hmmmm...idiot.

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Staticcharge
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Re: Order

Post by Staticcharge » Mon Feb 17, 2020 9:57 am

rthorntn wrote:
Thu May 02, 2019 11:58 pm

I'm tempted to solder an area at a time (diodes, caps, resistors), sort of soldering in a circle around the IC's, so that I can leave some space for the tip, thoughts?

Has anyone just done say all 114 of the 1K resistors one after the other and then moved on to all of another value?

Any other tips?

It's going to be a very slow build.
How are you getting on with this build, did you manage with the method you used?
I've attached an iBOM and I recommend to anyone, get all of the components you need to complete it. Put all of your resistors and caps in order as shown on the original BOM or in the order on the iBOM so you know where you are and where you have left yourself.
The iBOM will highlight the component placement and give you the number, ie: R1, R2 or C1, C2 and so on. I tend to place all of the horizontally placed and the turn the board 90 degrees and place the rest, then go on to the next value. I soldered mine all in one go on a heat plate set to 200c as the MCU and most other ICs have a temp limit of 260c.
I've also got an auto solder paste applicator (USB/adapter and not pneumatic) so this makes it easier but not worth the investment if your not a regular to SMD but does cut the build time greatly.
The main thing with any SMD build is if you have to walk away from it, leave it in a state of order so you know where to start from at your next visit. Also...and this is the main one for me, relax and enjoy. With the wealth of knowledge on Muffs if you get into a spot of bother, you'll find help within these pages.

steviet
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Re: DIY 4ms SMR

Post by steviet » Mon Feb 17, 2020 9:36 pm

Staticcharge wrote:
Mon Feb 10, 2020 12:34 pm
I don't know if this iBOM makes this build any easier for folk: SMR iBOM.rar
Let us know if it's of use as it may help others decide whether to build it or not. With such a price tag on the parts I would think it's a bit of a gamble for some so I hope the iBOM helps.
This is great! The only other time I've seen this was for the Westlicht Performer, made it waaay easier. This has inspired me to pull the trigger on the Mouser cart and get this thing put together. Thanks for this!

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Staticcharge
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Re: DIY 4ms SMR

Post by Staticcharge » Tue Feb 18, 2020 1:08 pm

It makes the build within reach for so many people, it's a fantastic module but just seeing the 114 1k resistors.....hmmm, so much room for error. The iBOM is the way forward and I'm glad people can make use of it. It was another wiggler that put me on to it when I started building SMD modules.
This is before I swept the components down with an IPA wash to clean up the PCB. The panel is a Pusherman but I found the momentary button holes to be to small, the black 4MS panel is cheap enough though so I may invest at some point.
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