I wish I read this in full before taking mine apart. I definitely completely ripped out my limit switch 
Anyone have a link to the fastest way to ship one A350 LM in the U.S.? Looks like the google results for B&H and 3dPrima are both out of stock. Edwin mentioned some shop in N.Y. when I talked to him. Anyone know who they are?
B&H is based in New York, that’s likely what he was referring to.
If you want a project, you can just buy microswitches. They aren’t particularly exotic. Digikey, Mouser, Newark, Jameco. Don’t know exactly which switch is right, but they are fairly standardized.
Talked about that a bit here : Linear actuator end stop switch broken - #3 by brent113
Great idea! I use Mouser a LOT, and it’s nice that I get cheaper 2-day shipping because they’re only about 200 miles away from me. However, the original installer stripped one of the screws pretty bad, and my ball-end hex key isn’t having it, so I’m going to just opt for a replacement this time 
Cancel that. @brent113 You inspired me to try a different approach. My flat end hex key was juuuust able to grab the very bottom of that hex hole and it came out! I think some crafty needle nose plier bending of the metal part of actuator got me “good enough”. It’s reinstalled and clicking where it looks like it should!
You saved me probably $150+ plus waiting who knows how long on shipping. I owe you a beer sir. Thanks!
Hey while you’re in there, can you grab a part number off the switch or a dimension? Would be nice to finally be able to confirm or deny if that Omron switch would be a replacement for it.
The datasheet for the Omron D2F-01L that I was thinking is here with the full dimensions: http://www.farnell.com/datasheets/2340369.pdf
It’s close. The very slight difference in the width of the actuator makes me think the D2F won’t work. My actuator switch is just barely catching the corner of it; the carriage does not roll over the whole surface of the actuator, just the very edge.
I marked the “Invalid” measurement indicating the distance of my actuator from the body of the switch, which is not valid because I bent it and shaped it back, so my travel will not be what a new switch will look like. The width was right at 3.85mm though.
Oh yeah that def does seem to be the same switch used as the filament runout detection.
Have my A350 since Dec '20.
Used to print fine but lately prints started to show misprints.
Decided to check the machine and to my surprise found the same sort of play shown in the first video in both Z-axis modules.
As machine is still under warranty contacted support.
Just curious if opening the module to adjust will void the warranty.
Technically yes. So if you want to make sure let them tell you to do the adjustment.
Practically, there isn’t a seal or anything that would show that you’ve opened them up.
And they haven’t asked anyone to return parts for warranty repair. (Shipping costs prohibitive)
-S
@sdj544 thanks for your words of caution 
will not tempt the Gods.
Saw your rusty cams and I was wondering how long you have owned this machine and what kind of environment you keep it’s in? I live within 5 miles from the coast in Florida, so it is humid, but don’t get a lot of salt air. I am worried about keeping the machine in the garage for just this reason.
That rusty picture is from the official repair guide here: What should I do when the carriage/slider of the linear module is loose? – Snapmaker
Not getting anywhere with support at this moment.
Has anyone got a link for good quality replacement bearings ?.
They are u-groove bearings, but I don’t know the dimensions. Is there anything from here that matches up? https://www.vxb.com/U-Groove-Bearings-gothic-arch-s/236.htm
Hi, thanks for your reply.
The closest on that website is the SG10UU.
The exact size for the A350 is 4 x 6 x 13 x 6.5mm.
This 6.5mm is the pinch, normally the SG10 is 8.2 mm.
I am located in Europe - do you perhaps know of any supplier that has good quality bearings willing to supply to Europe or is there a Chinese one good enough ?
Hey, I’m missing where the 8.2mm dimension is on VXB’s drawing, which dimension is that? I don’t see a W label. Is that the boss labelled B you think? Or B+C/2?
Regardless, are these closer?
If we can nail the nominal bearing dimensions down it’ll be easier to find a local supplier
Assuming that drawing is mostly to scale, it’s the total width of the bearing. “W” for width is used elsewhere on their side. It looks like W = B + C/2 in that drawing, assuming that the groove is centered in the C dimension. That puts B = 5.2 mm.
Hi was out of town so late reply.
The SG10(UU) bearing has W = 8.2mm which is indeed W = B + C/2.
The W dimension is not shown in the diagram unfortunately.
The Snapmaker bearing has a W=6.5mm.
The SG10UU can probably fit because there is a 1mm washer under the Snapmaker bearing which brings W= 6.5 + 1 = 7.5mm.
The difference of 8.2 - 7.5 = 0.7 mm will mean the slider will be slightly raised which will probably compromise the dust shield.
Both linear module bearings must be replaced by the same bearings or skew will be there.
