roland xf-640 not measuring full length

[flyplainsdrifta]

hey guys i really hope someone can help me here. this morning i come in, load up a 38" roll and hit set up. the carriage comes across to measure but is consistently coming up about 2 and a half inches short. its kind of locking me into place unfortunately. does anyone have any ideas as to what could be causing this sort of thing?

 

[Solventinkjet]

I'm not too familiar with that specific model but a lot of Roland machines don't measure the material directly but measure where the pinch rollers are located. If your pinch roller is not on the edge of the material it will measure short. Also, run the environmental match and see if that helps at all.

 

[flyplainsdrifta]

Actually just figured it out after attempting a print and realizing I was getting a bit of skew in the print that it was encoder strip. Ran a 30 roll job last week so it makes sense. Did a lengthy cleaning and we’re pretty much all better

 

[Joe House]

I'm not too familiar with that specific model but a lot of Roland machines don't measure the material directly but measure where the pinch rollers are located. If your pinch roller is not on the edge of the material it will measure short. Also, run the environmental match and see if that helps at all.

Vander, (and others) on Roland print only devices, the pinch wheel setup is similar to, say, a Mutoh- not moveable and relatively a solid row of wheels.
The use am optical sensor on the carriage to measure the actual media. So typical problems with this system are (usually in this order in my experience)
1. Ink buildup on the reflective strip under the media
2. Ink/ dust buildup on the encoder strip
3. Ink/ dust buildup on the paper side sensor

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