MacDermid ColorSpan 5440 Technical Training Manual - page 22
- Rail height must be properly calibrated to achieve correct head height.
- Stainless-steel strips are flat in the rail across the width. If the strips are too
long, installation of the idler and carriage drive bracket will compress them,
creating slight ripples in the strips that will negatively affect output. If ripples are
detected, remove the idler and flatten the strip. Trim the excess and replace the
idler.
Main Carriage belt
- Tension is crucial for this part. Tension is best judged by examining the idler.
When properly tensioned, the tab on the idler fork will extend approximately 0.40"
from the bracket. If the belt is too tight, the tab will extend more than 0.40" as the
fork/spring is unable to push the pulley far enough to the outside. If the belt is too
loose, the tab will extend less than 0.40", as the spring will push the fork all the
way to the front and push the pulley too far to the outside.
- Belt is secure in trolley/head, cannot slip or move when pulled. Placement of
belt in trolley/head should be all the way in the slot, with bracket securely in
place. Belt slippage after installation is a principal cause of belt tension problems.
- If removing, but not replacing, a belt (e.g., to remove the carriage), it is helpful
to mark the belt
prior
to removal to show how far the belt must be reinserted into
the carriage.
- Belt does not ride high or off of pulleys. This can induce noise and banding.
- Belt cannot be twisted inside the rail.
- Belt should be parallel from pulley to carriage. Installing the belt at an angle into
either side of the carriage will result in unwanted belt travel up and down the pul-
leys.
Carriage Drive Assembly - This assembly consists of a bracket, motor, pulley/shaft,
and timing belt. FRMs for the complete assembly or for the constituent elements are
available.
- The bracket must be securely attached to the rail.
- Motor must be mounted flush to mounting bracket, this to prevent pulley cant-
ing.
- Drive shaft bearings must run true with no noticeable drag or roughness. Must
be held fast to shaft, no slippage.
- The timing belt should have a measured deflection of approximately 1/8".
- Drive shaft pulleys must be in proper alignment with belts, no slippage.
- Noise from the drive assembly may often be traced to the tensioning spring
between the motor and bracket. Attempt adjustment (i.e., repositioning) of this
spring before considering component replacement.
5400 Technical Training Manual
MacDermid ColorSpan Confidential
Page 18 of 39
MacDermid, Inc. 11311 K-Tel Drive, Minnetonka, MN 55343
Phone: 952-944-9457 Fax: 952-944-8507