Bandsaw hitting a nail. Are there metal detectors that can penetrate deep through logs? It would be a great addition to this machine.
Previously:
Ship Saw - photo and videos
Bandsaw hitting a nail. Are there metal detectors that can penetrate deep through logs? It would be a great addition to this machine.
Previously:
Ship Saw - photo and videos
I don't think this was necessarily the saw hitting something in the log, I think it was a blade tracking issue leading to a crash. That's a twin vertical bandsaw (like this one), used to square off both sides of a log at the same time, and the right-side blade starts tracking to the center around the 3 second mark. I don't know about the first tiny spark, but I think the fireworks are the blade hitting the trough/feed chain under the log.
Here's one working properly:
KustomsbyKent (Jan 15, 2019), Moldyjim (Oct 20, 2021), PJs (Jan 16, 2019)
I think it's probably both of the mentioned scenarios. It looks like it nicked the blade at about 03 sec causing the blade to deflect as a result of the dulling caused by the nail (or whatever it was). The blade, when it tracked off, hit the conveyor chain as evidenced by the sparks come from underneath the log. Also notice the sparks from the left blade as the broken right blade contacts it. It would be easy enough to add metal detectors to the process to stop the conveyor before catastrophic blade damage occurs or a simple limit switch on the blade in case it deflected too far - simple. I would think a few sets of blades would pay for the equipment then you'd be money ahead - Labor + materials + downtime + not getting other things done while someone makes repairs = whole lotta cost!
My luck would be replacing both blades then the very next log having another nail!
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