Keep it clean. A dirty copier is an inefficient copier. Dirt can get on the rollers and cause “slippage,” which means the paper can’t grip the paper to pull it through the machine to print, copy, or scan. Dirt on the platen (that’s the large piece of glass) can cause speckles on copies and even interfere with OCR if you scan documents.
If you notice that the same machine keeps having the same error, call in your service partner to look the machine over.