Input Parameters - Mill 1
Output Results
Enter input parameters and click Calculate to see results.
Set your mill openings from TCH, fibre% cane, roll dimensions, and roll speed — and get practical targets for feed, discharge, trash plate, top roll lift, and UFR.
Built for operations: quick calculations, clear definitions, and results you can take to the mill floor.
Get StartedMill performance depends heavily on setting the roll openings and trash plate so the mill runs with the right blanket thickness and juice drainage.
Estimate the operating/work openings needed for your cane rate and fibre content.
Convert to set openings (settings at rest) after allowing for top roll lift (roller rise).
Treat top roll lift as a key operating value. Many evaluation procedures recommend measuring it under real conditions.
Mill setting practice typically calculates work openings (running gaps) first, then converts to set openings (empty mill) that you physically adjust.
Tip: The closer your inputs match real measured mill values (especially RPM and lift), the closer the settings will match actual operation.
What it is: The set opening between the top roll and feed roll when the mill is empty/stopped.
Why it matters: Controls how the blanket enters the mill, affects compaction, and strongly influences stable feeding and extraction.
How to use it: Set the feed opening to this value at rest; during running, the top roll will lift and the work opening will be larger.
What it is: The set opening between the top roll and discharge/delivery roll when the mill is empty/stopped.
Why it matters: Has a direct impact on final compaction, bagasse moisture, and the mill's ability to express juice efficiently.
How to use it: Adjust the discharge opening to the target set value. Monitor bagasse moisture and extraction to fine-tune.
What it is: The target trash plate position/clearance relative to the rolls.
Why it matters: Supports and directs the bagasse blanket through the nip. Correct geometry helps with juice drainage, blanket stability, and consistent loading.
How to use it: Adjust the trash plate to the set value using your mill's standard reference points.
What it is: The estimated vertical rise of the top roll during operation (roller rise).
Why it matters: Your physical setting is done with the mill empty, but the mill runs under hydraulic load. Top roll lift is the bridge between set openings and work openings.
Operational note: If actual lift becomes higher than assumed (overloading, worn components), the blanket runs thicker and extraction may suffer.
What it is: The target setting at the Under-Feed Roller, typically used with pressure feeders and modern feeding arrangements.
Why it matters: Stabilizes feeding, improves compaction before the feed nip, and helps avoid choking/surging.
How to use it: Apply this set value using your site's measurement method (UFR measurement references vary by design).
Convert TCH + fibre% into a fibre flow rate
Use roll size + RPM to estimate roll surface speed
Calculate target work openings (openings while running)
Convert work openings to set openings by allowing for top roll lift
Output the final settings you can physically adjust
Work opening is the gap while the mill is running. Setting is the gap with the mill empty/stopped. Because the top roll lifts under load, the setting must account for lift.
Because it directly affects the conversion from work opening to set opening, and it's an operational value worth monitoring.
UFR commonly refers to the Under-Feed Roller used in mill feeding arrangements; it has its own critical setting.