Nearly every sheeter runs with accurate sheet length when first started up. But after hours of continuous production, sheets start coming out slightly longer or shorter, causing rejections and material waste. This slow drift is easy to miss but becomes very costly over long production runs.
Based on our after-sales team’s field records, the most common causes of sheet length variation are:
1. Encoder signal drift or instability
Small electronic errors in the encoder add up gradually during long-time operation. This leads to consistent sheet length variation that is hard to detect in early stages.
2. Worn or slipping rubber rollers
Worn rollers lose surface friction and grip. Unstable feeding makes length counting unreliable, resulting in inconsistent sheet length even under the same settings.
3. Mechanical thermal expansion
As the machine warms up, key parts expand slightly. This changes the actual cutting position and feeding distance, causing slow but steady length drift over shifts.
Stable cutting accuracy needs more than just initial calibration. It requires a system designed to resist drift.
SMH equips its sheeters with high-precision, anti-drift encoders and thermally stable mechanical structures. We also provide clear periodic verification guidelines to keep sheet length consistent across entire shifts, reduce waste, and maintain stable cutting accuracy.
