Key facts
- What it is
- Full electrical and control rebuild, mechanics retained
- Machines
- Cylindrical, centreless, surface, internal and special grinders
- Control
- Delta PLC, HMI, VFD and ASDA servo
- Typical duration
- A few weeks from approval, confirmed after survey
- Cost basis
- Quoted only after a machine survey
- Handover
- Unlocked source, schematics, I/O list, operator training
What retrofitting actually means
Grinding machine retrofitting means keeping the mechanical body of the machine — the bed, spindle and slideways — and replacing everything electrical and control related around it. We strip out obsolete relay logic and unsupported drives, then rebuild the machine on modern Delta PLC, HMI, VFD and servo control so it runs accurately again with spares that are still available.
Most grinding machines on Indian shop floors are mechanically sound and electrically obsolete. The bed, spindle and slideways were built to last forty years. The relay panel, the drive and the operator controls were not. That gap is the whole of our business.
What a retrofit gives you back
- The cycle. Auto infeed, spark-out and dwell working again as a repeatable sequence rather than something the operator times by hand.
- The size. Component size held shift after shift, not drifting through the day.
- The spares. Every electrical part on the machine available from a Delta distributor in Gujarat instead of from a supplier who stopped trading.
- The documentation. Schematics, I/O list and PLC source that your own maintenance team can work from.
What we do not touch
A retrofit is not a mechanical rebuild. We do not regrind slideways, rescrape beds or rebuild spindles. If the mechanics are worn past the accuracy you need, new control will not recover it — and we will tell you so at survey stage, even though saying it costs us the order. See how we work for why that matters to us.
Machines we retrofit
We take on the four main grinder families, plus imported or orphan machines where the original supplier no longer offers support — in those cases we reverse-engineer the grinding cycle from the machine itself. Each machine type has its own page:
- Cylindrical grinder retrofitting — plain and universal, servo infeed and digital size readout
- Centreless grinder retrofitting — through-feed and in-feed, regulating wheel VFD control
- Surface grinder retrofitting — table and cross-feed automation, auto down-feed
- Internal grinder retrofitting — quill feed control and bore-size compensation
How a retrofit runs
Six steps, in this order, every time. The sequence matters — most retrofits go wrong because parts were bought before anyone agreed what the machine should actually do.
Machine survey
We come to your plant, run the machine as it is, check the mechanical condition and note the grinding cycle you need back.
Scope & quotation
A written scope, a control philosophy and a transparent Delta BOM. You know what you are buying before you commit.
Design & drawings
Electrical schematics, panel layout, I/O list and console design. Everything documented before we build.
Panel build & wiring
Panel manufactured and wired in our Wadhwan shop to the schedule, with ferrule numbers matching the drawing.
Programming & testing
PLC, HMI, VFD and servo programmed and dry-tested on the bench before the panel goes anywhere near your machine.
Install & prove the size
Installation, commissioning, trial grinding on your own components, operator training, and the full document set including source code.