To avoid ever seeing "E05 Link" again:
The SPC port has tiny copper fingers. Coolant, oil, or grime can create a conductive bridge, tricking the caliper into thinking an external device is connected when it isn't.
Sometimes, the link is truly broken. Mitutoyo does not sell main boards to the public. They enforce a "replacement only" policy.
You will not fix E05 if:
The "Link" to Mitutoyo Service: In North America, contact Mitutoyo America Corporation (MAC) in Aurora, Illinois. They offer a flat-rate repair service. As of 2025, repairing a 6" caliper with E05 costs approximately $75–$100—often half the price of a new unit. They will replace the entire circuit board and recalibrate the link.
To avoid ever seeing "E05 Link" again:
The SPC port has tiny copper fingers. Coolant, oil, or grime can create a conductive bridge, tricking the caliper into thinking an external device is connected when it isn't.
Sometimes, the link is truly broken. Mitutoyo does not sell main boards to the public. They enforce a "replacement only" policy.
You will not fix E05 if:
The "Link" to Mitutoyo Service: In North America, contact Mitutoyo America Corporation (MAC) in Aurora, Illinois. They offer a flat-rate repair service. As of 2025, repairing a 6" caliper with E05 costs approximately $75–$100—often half the price of a new unit. They will replace the entire circuit board and recalibrate the link.