Key facts
- Machine types
- Through-feed and in-feed centreless grinders
- Regulating wheel
- Delta VFD with repeatable, settable speed
- Cycle
- In-feed sequencing and dwell under PLC control
- Operator interface
- Delta HMI with per-component settings
- Typical gain
- Consistent throughput rate between operators
The centreless grinding problem
On a centreless machine the regulating wheel sets the work speed and, on a through-feed setup, the throughput rate. If that speed is set by a worn potentiometer or a drive nobody can source parts for, the rate you get depends on the day. Putting the regulating wheel on a Delta VFD makes the setting a number that can be recorded, repeated and handed between shifts.
Through-feed machines
The priority is a stable, repeatable regulating wheel speed and a wheel drive that starts predictably. We fit Delta VFDs on both, with the working speeds stored per component so setting up a known job is a recall rather than a trial run.
In-feed machines
In-feed work adds a cycle to sequence — approach, grind, dwell and retract — which goes into the PLC alongside the drive control. Dwell timed by the controller rather than judged by the operator is usually the single biggest change to part-to-part consistency on these machines.
What we fit
- Delta VFD control on regulating wheel and grinding wheel drives
- PLC sequencing for in-feed cycles, including timed dwell
- Delta HMI with per-component speed and cycle settings
- New operator console with a properly wired safety and E-stop chain
- Coolant and hydraulic interlocking brought into the same control
Scope on any given machine is settled at the survey — see how a retrofit runs.