Ring Frame & Autoconer
283.5 kW Saved
✍ Sanyou Machinery & Technology
⏰ 8 min read
At Mahmood Spinning Mills, a detailed section-by-section energy audit of the Old Ring and Autoconer departments exposed 283.5 kW of avoidable electrical load — and a clear, engineered path to eliminating it. Here is exactly what was found and how it was fixed.
First Section Audited
Second Section Audited
Total kW Saved
Measurable Business Impact
Ring Frame and Autoconer Energy Audit Pakistan: Why Mahmood Spinning Mills Acted
In Pakistan’s spinning industry, profitability is squeezed from both ends — rising electricity tariffs on one side, intense export pricing pressure on the other. The mills that survive and grow treat energy not as a fixed overhead but as a controllable variable.
Mahmood Spinning Mills took exactly that approach. Rather than accepting their utility bills as unavoidable, they invited Sanyou Machinery & Technology to conduct a full section-level ring frame and Autoconer energy audit. The audit covered two of the most power-intensive departments in any spinning facility: the Old Ring Frame section and the Autoconer (winding) section.
The findings were clear and actionable. The gap between installed electrical capacity and actual operational demand was large enough to deliver 283.5 kW in total energy savings — without stopping production, without replacing complete machines, and without compromising yarn quality or throughput.
The Old Ring Frame and Autoconer sections together typically account for 55–70% of a spinning mill’s total electrical load. They run 24 hours a day, 340+ days a year. Even a modest percentage reduction in these sections produces dramatically larger absolute savings than optimising smaller departments. This is where ring frame and Autoconer energy audits in Pakistan deliver the highest return.
What a Ring Frame Energy Audit Reveals: The Old Ring Section
Ring frames are the core of any spinning operation — and also the largest single source of electrical consumption. The Old Ring section at Mahmood Spinning Mills was operating with motors and control systems installed during original commissioning. No load profiling had ever been performed. No variable-speed controls had been retrofitted.
The Four Hidden Losses Found in the Old Ring Section
Ring frame motors are sized for maximum count, maximum speed, and full spindle complement. Mahmood’s Old Ring section regularly ran finer counts at reduced spindle speed. The installed motors were drawing full-load current for a fraction of the mechanical work required — the most common and costly hidden waste in any ring frame energy audit in Pakistan.
Every ring frame has pneumatic waste collection fans running at fixed speed regardless of spindle speed or season. A VFD on a fan motor at 80% speed reduces power consumption to approximately 51% because power in centrifugal loads follows the cube of speed.
The clamp meter survey revealed the Old Ring section’s power factor had degraded below 0.78. At this level, WAPDA’s kVA-based billing was adding a substantial surcharge to every unit consumed. Reactive power correction at the section panel was an immediate, low-cost fix.
The Old Ring section was still using sodium vapour and fluorescent luminaires. LED conversion with motion-sensing controls in non-production zones reduced background consumption with negligible capital cost.
What an Autoconer Energy Audit Reveals: The Winding Section
The Autoconer section is frequently underestimated as an energy consumer. Older Autoconers running without drum-speed optimisation carry a surprisingly large electrical footprint, especially when operated at speeds mismatched to the yarn count being wound.
- ✔Drum motors running at fixed high speed for all counts — fine count yarn requires lower drum speed. Running at maximum speed for fine counts wastes energy and increases end breaks.
- ✔Suction system running at 100% during all shifts — including doff changes, maintenance windows, and partial creel loading. VFD control tied to production state reduces this significantly.
- ✔No sub-metering at machine level — individual Autoconer units had never been measured. Some units were drawing disproportionately high current due to worn bearings and misaligned drive components.
- ✔Power factor below 0.80 — reactive power correction had never been applied to the Autoconer panel specifically.
When each Autoconer unit was individually clamp-metered, two units were drawing 18–22% more current than identical neighbours. Root cause: bearing wear and a partially slipping drive belt — neither visible without unit-level measurement. Fixing these two units alone contributed measurably to the total saving.
The Results: 283.5 kW Saved Across Both Sections
Consolidated before-and-after data for both sections following Sanyou’s energy optimisation at Mahmood Spinning Mills.
283.5 kW was permanently eliminated from the operational load of Mahmood Spinning Mills. No production was halted. No complete machines were replaced. The savings are recurring — every month, every year, for the life of the optimised systems.
The Four-Step Process Behind Every Sanyou Ring Frame and Autoconer Energy Audit in Pakistan
Before any recommendation is made, individual sub-meters and clamp meters are installed at machine group level. This creates the baseline data that every subsequent decision rests on. Mills that have never sub-metered their ring frame or Autoconer sections are almost always surprised by what the data shows.
Consumption is measured during doffing, steady-state running, count changes, and idle periods. This builds a complete picture of the load curve — not just a single snapshot. Many hidden wastes only appear during specific production states.
Solutions are selected based on measured data, not assumptions. VFDs are installed only where the load curve confirms variable-speed benefit. Capacitor banks are sized to the actual reactive power deficit. Motor replacements are recommended only where right-sizing analysis confirms the return justifies the capital.
After implementation, the same metering points are re-measured to confirm and quantify the saving. The mill receives a documented before-and-after report usable for NEECA compliance or bank financing documentation.
Does Your Spinning Mill Show These Warning Signs?
The conditions at Mahmood Spinning Mills — unmetered sections, oversized motors, no VFDs, degraded power factor — are the norm across Pakistan’s spinning industry. If your mill has any of the following, a ring frame and Autoconer energy audit will almost certainly uncover recoverable savings:
- ✔Ring frames more than 8 years old with no VFD retrofits on fan or ancillary motors
- ✔Autoconers running at fixed drum speed regardless of yarn count
- ✔No individual sub-metering at section or machine-group level
- ✔Power factor below 0.90 on your WAPDA or CPPA-G billing statement
- ✔Electricity billed on Connected Load (CL) rather than Maximum Demand (MD)
- ✔No energy audit conducted in the last 3 years
- ✔Lighting in ring frame or winding sections still on fluorescent or sodium vapour
At current industrial electricity rates in Pakistan (PKR 55–70/unit), a 283.5 kW sustained reduction over 20 operating hours per day saves approximately PKR 9.5–12 million per month. The payback period on a full ring frame and Autoconer energy optimisation project typically ranges from 8 to 18 months, after which the savings are pure cost reduction.
Frequently Asked Questions
Sanyou conducts section-level energy audits for ring frame, Autoconer, Drawing, Simplex, and HVAC sections across Pakistan’s textile mills. No obligation. Measured results. Documented savings.
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Energy optimisation, textile machinery & HVAC engineering specialists — Pakistan.