Key facts
- Machine types
- Internal grinders and internal attachments
- Spindle drive
- Delta VFD, high-speed spindle drives replaced
- Quill feed
- Servo or controlled feed with programmable rates
- Size control
- Bore-size compensation for wheel wear
- Operator interface
- Delta HMI with per-bore settings and recipes
The internal grinding problem
Internal grinding wears the wheel fast, and a worn wheel grinds a smaller bore. On a manual machine the operator compensates by feel and by gauging, which means the first part after a dress and the last part before the next one are not the same size.
Bringing quill feed and compensation under PLC control turns that correction into something the machine applies consistently rather than something the operator remembers to do.
What we fit
- Spindle drive replacement. High-speed internal spindle drives replaced with current Delta VFD hardware, parameterised on the machine.
- Quill feed control. Feed rates programmable, with separate rough and finish rates and a controlled approach so the wheel does not enter the bore under load.
- Bore-size compensation. Wheel wear compensation applied through the cycle so bore size holds between dresses.
- Delta HMI holding settings per bore, so repeat components are recalled rather than re-set.
Internal attachments on universal machines
Where internal grinding is done on an attachment fitted to a universal cylindrical grinder rather than a dedicated machine, the attachment's spindle and feed are brought into the same control and the same HMI, so the operator is not switching between two ways of running the machine.