When you enter the Manufacture environment, the Spindles toolbar will display sub-spindle specific commands. These will be used later in the machining process.
Perform turning instructions on the main spindle as required, using the appropriate turning cycle(s).
Upper turret instructions (clearly shown as being on the main spindle) are displayed in the left-hand column of the Sequence Window. The asterisk indicates the currently selected turret. Click here to view how the Sequence Window displays instructions on different spindles and turrets.
To switch turrets right-click on the lower turret title bar and choose the Select option. The asterisk moves to the lower turret and the upper turret instructions are greyed out.
The Select Spindle (M-Functions menu) command (see details) enables switching between main and sub-spindle. Select the command to automatically select the sub-spindle.
The sub-spindle CPL is displayed (see below):
Perform the required machining instructions on the sub-spindle (see below). Positioning moves are now performed relative to the sub-spindle CPL.
The Sequence Window shows rough and straight turning cycles on the lower turret and on the sub-spindle. In addition, a time line can be displayed. This shows that the upper turret is working on the main spindle while the lower turret is working simultaneously on the sub-spindle. Click here to see how the instructions are displayed in the Sequence Window and the time line.
Select the main spindle and position a finish turn tool to a safe start point.
Use the Synchronise
Turrets 
to tell the lower turret to wait until the
upper turret has finished machining. At the same time the lower turret
will take control of the spindle. See Synchronisation
and Turret Priority.
The synchronisation commands are lined up in the Sequence Window to make it easier to read. Following synchronisation both turrets start again simultaneously until reaching the next synchronisation point.
Perform a Finish Turn cycle.
Next, you need to perform a spindle docking command (see diagram). Prior to performing spindle docking ensure both turrets are returned to a safe position i.e. the tool change position. The main spindle has to be selected before docking can occur (click here to see Sequence Window) The docking command prompts for a z clearance position (relative to main spindle CPL) – the grip position is defined during lathe setup. Also see Spindle Docking.
Next, perform a Parting Off operation. When the part off is complete the sub-spindle is returned to its home position. The display of the sub-spindle at the grip position is turned off. The parting tool can then be sent back to its toolchange position. See Moving the Sub-spindle.
A bar feed can be performed to set up the main spindle stock for the next program run through. To do this, load a bar stop tool and select the Bar Feed (Move menu) cycle. See Bar Feed Cycle.
The instruction list shows a complete sub-spindle machining sequence.
The time line can be used as a validation tool to ensure synchronisation positions are correctly placed. EdgeCAM simulation with the Constant option unchecked also gives a good indication that the synchronisation positions are correctly placed.
Select the Simulate Batch (View menu) command. Bar feed is programmed typically at the beginning or end of the machining sequence. To simulate bar feed you need to run the simulation in batch mode. If bar feed is at the end of the sequence check Initial Stock , this means the main spindle stock defined in EdgeCAM will be displayed as soon as you start Simulator. Specify the number of times you want the simulation to run by specifying the Batch Size. See Sub-Spindle Simulation.
Please note that in sub-spindle turning, two instances of stock can be machined independently. The Features Window is used to assign the stock to the main spindle or the sub-spindle respectively. See Assigning Stock and Fixtures for Sub-Spindle Simulation.