Originally Posted by
kenmwallace
You say you had the power part of the spindle repaired. I guess you mean the motor speed controller or VFD (variable frequency drive). In machines that must orient the spindle for the tool change, the VFD has a special added feature that receives information from the encoder. This allows the VFD to stop the spindle in the correct position for aligning with the tool holder. It sounds like this system is not working on your Hurco.
It could be the encoder is not sending the index pulse, or the VFD is not configured to use the spindle position feature. There may be a set-up configuration option in the VFD that must be set for this to work. Configuring the VFD can be confusing. I hope you have an operator's manual in French!