Why did this happen?
Why Does Wood Cup or Twist After Milling?
A board looked usable, then moved after you milled it.
What to do first · Possible causes · Prevention · Lessons learned
Work through this problem →Learn from the unexpected
A chipped edge, an open joint, a mark you didn’t expect. Understand what might be behind it, what to do next and how to reduce the chance of it happening again.
01
Stop when something is wrong. Get help for immediate danger before looking for a cause.
02
After making safe, compare what you observed with the possible causes. Avoid guessing or repeating a dangerous event.
03
Correct the cause, know when qualified help is needed, and record what should change next time.
8 guides found
Why did this happen?
A board looked usable, then moved after you milled it.
What to do first · Possible causes · Prevention · Lessons learned
Work through this problem →Why did this happen?
The edge fibers lift, chip, or break away instead of leaving a clean cut.
What to do first · Possible causes · Prevention · Lessons learned
Work through this problem →Why did this happen?
The cut edge is dark, hot, or smells scorched.
What to do first · Possible causes · Prevention · Lessons learned
Work through this problem →Why did this happen?
The color absorbs unevenly, with dark patches and pale areas across the same board.
What to do first · Possible causes · Prevention · Lessons learned
Work through this problem →Why did this happen?
A solid-wood tabletop cracks, splits, or pulls against its base as the seasons change.
What to do first · Possible causes · Prevention · Lessons learned
Work through this problem →Why did this happen?
A glued joint opens, separates, or fails under normal use.
What to do first · Possible causes · Prevention · Lessons learned
Work through this problem →Why did this happen?
The collector runs, but chips and dust stay at the machine.
What to do first · Possible causes · Prevention · Lessons learned
Work through this problem →Why did this happen?
Two mitered pieces should close, but the joint opens at the inside, outside, or both.
What to do first · Possible causes · Prevention · Lessons learned
Work through this problem →Explore preparation, kickback, broken bits, laser and dust fires, and safe handling of finish waste. Each situation includes immediate actions, prevention and a lesson to carry forward.
Explore workshop safety →