Application Requirement
The process uses a counter spindle to support a workpiece approximately 250 mm long while machining nine 5 mm holes on its cylindrical surface. The proposed sequence machines a turned step and the first three holes at an extension of approximately 80 mm, pulls the part to its full working length with the counter spindle, then supports it while machining the remaining six holes.
| Item | Requirement |
|---|---|
| Workpiece length | Approximately 250 mm |
| Cross holes | Nine holes, 5 mm diameter |
| Initial extension | Approximately 80 mm |
| Initial machining | Turn the step and machine three holes |
| Supported machining | Machine the remaining six holes |
Required Tailstock Configuration
Pulling stock with the counter spindle and using that spindle as a true tailstock are different functions. A true tailstock application requires the machine option that enables the counter spindle to operate as a tailstock and requires a tailstock center.
If the counter spindle must alternate between collet clamping and tailstock support, it also requires an additional mechanism. The center must retract during collet clamping and be integrated with the clamping arrangement.
Programming Decision
The evidence identifies L127 as a proposed command and L128 as the command currently used, but it does not define either command or confirm that L127 activates tailstock operation. Do not substitute L127 for L128 based on the command names alone. First confirm that the machine has the counter-spindle-as-tailstock option and the required mechanical center arrangement.
Configuration and Verification
- Check the machine option list for counter-spindle operation as a tailstock.
- Determine whether the counter spindle must retain collet-clamping capability. If it must, verify that the installed center retracts during collet clamping.
- Ask the machine manufacturer's retrofit department to confirm the required option, auxiliary equipment, and applicable program command for the installed configuration.
- Verify the approved sequence by confirming that the center supports the extended workpiece without interfering with the collet, tooling, or remaining six drilling operations.
FAQ
Can the C100 counter spindle be used as a tailstock?
Yes, but true tailstock operation requires the counter-spindle-as-tailstock machine option and a tailstock center. Stock pulling alone does not confirm that this option is installed.
Can L127 replace L128 for counter-spindle tailstock support?
The available evidence does not define L127 or L128 and does not confirm that L127 enables tailstock operation. Verify the installed option and obtain the correct command sequence from the manufacturer's retrofit department.
Can the counter spindle use both a collet and a tailstock center?
Yes, provided an additional arrangement is installed so the center retracts during collet clamping. The center must be integrated with the clamping configuration.