Machine does not measure length of board

[cwfreitas]

Today my machine has a problem measuring the length of the board it will get half way then it moved back and forth until I stop the machine. Does anyone have any suggestions?

[Digitalwoodshop]

Lots posted about this....

Either the board is jamming against the right side guide...

The Board is loosing contact with the brass roller....
Head Pressure too low
Board Warped
board missing wood at the brass roller
Wood too smooth and hard, brass roller is slipping on the wood
O ring is missing from the brass roller...
Sand paper belt rolled under...

AL

The back and fourth is key.... Loss of contact... Masking tape could help this... place on board at brass roller...