From Renishaw :
Troubleshooting Overload error Possible cause Solution Head lock up holding force exceeded during CMM acceleration Reduce mass of probe combination. Reduce acceleration. Collision with workpiece or CMM Check head for damage. Remove obstruction and repeat move. Obstruct error Possible cause Solution Head / stylus configuration obstructed Check head for damage. Remove obstruction and repeat move. Probe extension combination too long Use a shorter / lighter stylus combination. Internal head fault Contact your Renishaw representative. PH10 PLUS head and non-PLUS PHC10-3 or third party controller Contact your Renishaw representative
From Renishaw :
Troubleshooting Overload error Possible cause Solution Head lock up holding force exceeded during CMM acceleration Reduce mass of probe combination. Reduce acceleration. Collision with workpiece or CMM Check head for damage. Remove obstruction and repeat move. Obstruct error Possible cause Solution Head / stylus configuration obstructed Check head for damage. Remove obstruction and repeat move. Probe extension combination too long Use a shorter / lighter stylus combination. Internal head fault Contact your Renishaw representative. PH10 PLUS head and non-PLUS PHC10-3 or third party controller Contact your Renishaw representative