Wood is too dried out
The compact chipper series is designed primarily for chipping freshly cut wood. The FM6DD has been tested thoroughly chipping freshly cut hawthorn wood (slow-grown hardwood).
We recommend that the wood is chipped no longer than three days after cutting. After this date, the wood will begin to dry out, meaning the chipper blades then struggle to dig into the wood. This produces a sawdust-like waste from the exit chute, and the chipper will struggle to self-feed.
If the chipper is producing sawdust - this is a clear sign that the wood is dry. When chipping slow-grown hardwood like fruit trees (such as cherry or apple trees) you must ensure that you chip the material the same day that it is cut to ensure the machine operates at full effectiveness.