VP-540 Assy Linear Encoder Board - 6700989040

6700989040 – Linear encoder board (Assy Linear Encoder Board VP-540) – Roland

The 6700989040 linear encoder board (Assy Linear Encoder Board) is the optical sensor mounted on the printhead carriage of Roland VP-540 and related eco-solvent large-format printers and printer-cutters.

It reads the linear encoder strip stretched along the scan axis (X axis); at each carriage movement, the board transmits the exact head position to the machine electronics in real time. This precision guarantees a micrometric head positioning and a perfect firing of each ink drop, ensuring the print quality and the absence of banding. Supplied as a complete assembly, it installs directly in place of the original sensor without extra electronic adjustment; the flat cable and connector are identical to the factory mounting.

Technical specifications

• OEM reference: 6700989040
• Manufacturer: Roland
• Part type: Linear encoder board
• Equivalent references: W700981120, W700461130, W701407030
• Axis: X axis — printhead carriage
• Associated motor: Carriage servo motor (X / scan axis)
• Shipping: Shipped ready to install

Compatibility & use

• Roland RA
• Roland RF
• Roland RS
• Roland SP
• Roland VP
• Roland VS

Function

• Continuously reads the graduations of the linear encoder strip during the carriage scan
• Transmits the exact head position on the X axis to the control board
• Synchronises the firing of the ink drops with the carriage position
• Ensures the stability of the speed and the regularity of the scan step
• Allows the servo control of the carriage servo motor

Signs of wear

• Encoder error or servo error shown on the control panel
• Vertical banding or position offsets in the printed image
• Carriage hesitating, moving jerkily or stopping mid-pass
• Ink drops fired at the wrong place (blurry text, doubled outlines)
• Untimely machine stops at the start or during printing

Replacing this part restores the machine to proper working order.

♻️ DG Spare Parts – European specialist in spare parts for large-format printers and plotters.