The process time calculation for Electron Beam Welding uses the following formulas:

Some electron beam welding (EBW) machines have multiple workstations, allowing operators to load and unload parts from one workstation while parts at another workstation are robotically welded. Such machines allow for two parallel streams of activity:

Each of these streams can also include other auxiliary activities. Which other activities are included, if any, depends on the type of EBW machine involved. There are two types of multi-station EBW machines:

The machine properties Is Cycle Machine and Is Load Lock Machine indicate machine type. If both these properties are false for a given machine, the machine is assumed to be a standard machine, with a single station.

With cycle machines, the welding activity stream includes the pumping and venting activities:

With load lock machines, the loading/unloading activity stream also includes pumping and venting:

Therefore, with two-chamber machines, process time for a given batch of parts is the duration of the stream that takes the longest, plus the duration of activities related to moving parts between stations (which cannot be performed in parallel with other activities). These activities include the following:

With single-station machines, all activities are performed in sequence:

Load lock machines use this formula:

Cycle machines use this formula:

Note that these are per-batch process times. Per-part process times are per-batch times divided by the Number of Parts in the Machine per Cycle.

These formulas rely on the following values:

Weld time for a single Weld GCD is given by the formulas below.

Weld time depends on the following:

Default weld speed depends on the following:

The speed is bounded above by the machine property Max Speed.

Users can override the default speed with the setup option Weld Speed.