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Haas engineers have ensured that the capability for a full fourth axis is available on machines as an optional extra.

The fourth-axis capability is said to be quick to set up and is easy enough, in most cases, for an operator to carry out.

According to Haas, many machine shops recognise that a rotary fourth axis is not just for cylindrical parts but can return benefits in terms of cycle time savings, reduced setup times and component quality for those multi-sided parts where more than one setup/operation would otherwise be necessary on a conventional three-axis machine.

Where a Haas machine already has the optional fourth-axis drive installed, connecting a Haas fourth axis can be carried out using Setting 30, where Haas stores all the parameters for all of its rotary models.

Once the rotary is connected using the procedure in the Haas manual, the operator selects his model from the list and the Haas control will automatically retrieve the data and store in the correct parameters.

For programming simplicity, the Haas control needs the bare minimum of code for common operations such as drilling a hole on each face of a six-sided component.

Further features include G107 cylindrical mapping or for milling applications, use Setting 34 to store the fourth-axis diameter, which is important since all programmed feed rates are in mm/min.

This is a linear measurement, however, when the correct diameter is entered into Setting 34 the Haas control will calculate the angular feed rate using the diameter and the linear program rate, then coordinate the fourth axis to move at the correct speed to achieve the required linear feed from the program.

Specific instructions are enclosed within the Haas manual.

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