If the robot starts losing positional accuracy or refuses to boot up the motion system, the axis computer is one of the first units to suspect. 3HAC029157-001, better known as DSQC 668, is the axis computer that handles motion calculations in IRC5 control cabinets. Here I go through what the board does, which specifications are worth knowing, and what you should consider when replacing it.

What DSQC 668 Actually Does

The axis computer receives trajectories from the main computer and converts them into control signals sent to the drive units, while simultaneously reading resolver data for position feedback. This is where the actual motion control happens, cycle after cycle.

Technical Key Points for 3HAC029157-001:

Common Failure Symptoms

A workshop example: A welding cell with two robots started alarming sporadically during the night shift. Troubleshooting pointed to an axis computer that became unstable when the cabinet temperature rose. After replacing it with a tested unit, the alarms disappeared.

Exchange Unit or New?

Refurbished boards are fully viable if they have undergone bench functionality testing. A used, tested sparepart 3HAC029157-001 to ABB-robot comes with a 12-month warranty and can be installed directly into the existing configuration.

An exchange system makes the purchase cheaper: you return your broken board within 30 days and receive a lower price. The requirement is that the board is repairable and complete. Units damaged by failed soldering attempts or missing components are not accepted. If the part is returned unopened, 10 percent of the price is deducted; if the packaging has been opened, 20 percent is deducted.

Before You Order