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I'm sure I'm not the only one, but still...

The first picture explains the reason why I'm not a fan of using magnetic arms

brent wrote:The first picture explains the reason why I'm not a fan of using magnetic arms

Yeah. I've got a decent number of those too. Steep overhangs that cause curl or poorly generated supports are almost a guaranteed fault.

I've had similar failures, for all of the reasons that Tinyhead mentioned.

To satisfy a hunch, I decided to try to upgrade the magarms and double up on the magnets.
I did have to recreate the end caps with more depth, and cut the arms to a different length. Overall, the arms are the exact same length as before.

I've been running them for about 100 print hours now, and so far the only problem I've had, is that the magnets are strong enough to stop the hot end fan if the magnets on both of the magarms facing the fan are of the same orientation and the effector goes close to the extreme edge of the build plate. I'm still playing with it, and I've minimized the effects a bit, but the fan still slows down in that position.

gestalt73 wrote:I've had similar failures, for all of the reasons that Tinyhead mentioned.

To satisfy a hunch, I decided to try to upgrade the magarms and double up on the magnets.
I did have to recreate the end caps with more depth, and cut the arms to a different length. Overall, the arms are the exact same length as before.

I've been running them for about 100 print hours now, and so far the only problem I've had, is that the magnets are strong enough to stop the hot end fan if the magnets on both of the magarms facing the fan are of the same orientation and the effector goes close to the extreme edge of the build plate. I'm still playing with it, and I've minimized the effects a bit, but the fan still slows down in that position.

Sounds like it's time for some ducting!

gestalt73 wrote:I've had similar failures, for all of the reasons that Tinyhead mentioned.

To satisfy a hunch, I decided to try to upgrade the magarms and double up on the magnets.
I did have to recreate the end caps with more depth, and cut the arms to a different length. Overall, the arms are the exact same length as before.

I've been running them for about 100 print hours now, and so far the only problem I've had, is that the magnets are strong enough to stop the hot end fan if the magnets on both of the magarms facing the fan are of the same orientation and the effector goes close to the extreme edge of the build plate. I'm still playing with it, and I've minimized the effects a bit, but the fan still slows down in that position.

Do you find you get a lot more hold doubling up the magnets like that?

For mid-print filament issues that go away, make sure the plastic isn't wound around itself on the spool. I was shocked at how little drag it takes pulling plastic off the spool to cause very noticeable issue in print quality. It's an every print process for me now to loosen a few layers of spooled material.

@Foshon same here.