ATC spindle pushes toolholder when the drawbar is released

[dazp1976]

Could this happen if the drawbar is set too low making it come out too far?.
Is that possible?.
Interested to know.
Screwing it loose a bit and adding more springs to compensate it?.

Am I being dumb again?.

[JAZZCNC]

Could this happen if the drawbar is set too low making it come out too far?.
Is that possible?.
Interested to know.
Screwing it loose a bit and adding more springs to compensate it?.

Am I being dumb again?.

Not a dumb question but not how it works.

The Drawbar clamp which grabs the pull stud is pulled against a taper machined into the spindle shaft which then pushes ball bearings or a split collet system against the pull stud to draw it in and clamp. So "screwing it loose" as you call it won't work, it would actually make it worse and would fall off eventually.

The pneumatic piston could be adjusted so it doesn't push the drawbar down as far but that's not possible with these spindles as it's built into the spindle, plus the adjustment is very fine.

Wrong Pull stud length is the most likely cause here me thinks.?