Any messages on the "Diagnosis" page ?
- Does it time-out & then give any messages ?
- Are the tapers ( spindle & tools ) clean, dry & free of damage ?
When you have the tool unclamped, & you sit the tool in the spindle
- Does it sit all the way in onto the taper ?
- it should NOT seat on the taper, the "knock out pin" should be hitting the pull-studs
( it may need adjustment - or replacement )