I have very little electronics or soldering knowledge and I had just managed to do all the RepRap style mods to pre-built MakerBot boards and was mounting the boards onto my Mendel when my pliers slipped off the damn nylock nut and half knocked a capacitor off a stepper board. :X There's a scratch on the side, but I think it's ok. One lead totally detached and the other is loose. Here's a picture: [www.flickr.com] Does anyone have some advice on how best to fix it? Also, if I do manage to re-solder the tiny leads (I just ordered a smaller iron tip yesterday, I'll probably need it) how would I go about testing to make sure it's reconnected using a multimeter? Or should I just hook it up and see what happens, could it damage anything? https://reprap.org/forum/read.php?13,48680,48680#msg-48680 Wed, 07 Oct 2026 20:49:17 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?13,48680,49021#msg-49021 https://reprap.org/forum/read.php?13,48680,49021#msg-49021 gr0k Controllers Tue, 15 Jun 2010 00:40:16 -0400 https://reprap.org/forum/read.php?13,48680,48935#msg-48935 https://reprap.org/forum/read.php?13,48680,48935#msg-48935
From looking at the online documentation that these are power filter capacitors. So you should be able to get one with leads and connect it between ground and power. These are placed close to the connector to be effective.

I am not using this board in my setup (a mix of Gen 2 stepper drivers and the Gen 3 Sanguino.) so I can not be absolutely sure. I tend to use smaller caps closer to the chips in my own layouts. Something I notice not done on the v1.2 sanguino board.]]> sheep Controllers Sun, 13 Jun 2010 20:35:50 -0400 https://reprap.org/forum/read.php?13,48680,48790#msg-48790 https://reprap.org/forum/read.php?13,48680,48790#msg-48790 lunchtrayrider Controllers Sat, 12 Jun 2010 02:35:44 -0400 https://reprap.org/forum/read.php?13,48680,48687#msg-48687 https://reprap.org/forum/read.php?13,48680,48687#msg-48687
[www.flickr.com]

[www.flickr.com]

Click on the all sizes link to see a better view... It looks like the one side pulled part of the trace on the board loose?]]> gr0k Controllers Fri, 11 Jun 2010 02:47:53 -0400 https://reprap.org/forum/read.php?13,48680,48684#msg-48684 https://reprap.org/forum/read.php?13,48680,48684#msg-48684
Typically with these I use two irons. Since one side is already off then you can heat the other and remove the cap.

Testing a cap requires an analog volt meter with a needle. Set the volt meter to the resistance scale. This works as there is an internal battery which provides current. When the cap charges the voltage drop changes and the needle swings (Why an analog meter is needed.) It takes some practice to understand the swing. Normally this voltage drop is read as resistance. The cap has to be isolated from the circuit for this to work.

If the pad has not lifted, then one can re attach the cap soldering each pin at a time. Usually there is enough of a lip for hand soldering on most components.

If the pad has lifted, It probably would be easier to replace the SMT cap with a leaded cap. One would have to trace back to the common points. Most likely this is a filter cap which connects across the supply.]]> sheep Controllers Fri, 11 Jun 2010 02:31:48 -0400 https://reprap.org/forum/read.php?13,48680,48680#msg-48680 https://reprap.org/forum/read.php?13,48680,48680#msg-48680 www.flickr.com]

Does anyone have some advice on how best to fix it? Also, if I do manage to re-solder the tiny leads (I just ordered a smaller iron tip yesterday, I'll probably need it) how would I go about testing to make sure it's reconnected using a multimeter? Or should I just hook it up and see what happens, could it damage anything?]]> gr0k Controllers Thu, 10 Jun 2010 22:54:22 -0400