Crop Mark problem (Last crop mark)

[Riskok]

Hello guys

My Roland SP-540v cant find the last crop mark on a print i did.
Does any one know why?
I have tried using light etc. so it could find it but it dosent help.

Best Regards Patrik

 

[Slamdunkpro]

Always only the last crop mark or does it randomly have trouble finding marks? Could be that the ribbon cable is going bad, that's what happened on mine.

 

[Mosh]

Try lining up the front crop marks a little ahead where you usually do. Every once in a while ours does not find the crop marks, we just move the media adhead, or back until it finds it. Or yes it might be a bad ribbon cable.

 

[Letterbox Mike]

I don't have a Roland so I may be way off base, but we went through a couple Graphtec plotters that wouldn't read a registration mark for anything unless the room was as dark as possible. Did you try turning the lights off to see if that works? I guess this is assuming the Roland mark sensor is of the reflective type (with a light) like the Graphtec (and Summa and others...).

Dunno that would solve it or if this is an entirely different problem, that just popped into my head.

 

[Mainframe]

Sometimes I run the heavy black roller I got with my speedpress over the crop marks before I feed them back in the machine after I lam them.

 

[heyskull]

My Mutoh plotter won't read reg marks when the sun is shinning through the window in the morning!
I cover it over and it normally works

SC

 

[artray]

Hello guys

My Roland SP-540v cant find the last crop mark on a print i did.
Does any one know why?


I had that problem with my Roland GX 24" a few months ago. There were two solutions to my problem. The first was to much gloss on the crop mark. A very light sanding did the trick and the second solution was the software setting. It was not set for contouring cutting. When I reversed the setting it read the crop mark correctly.

 

[Slamdunkpro]

A couple of more thoughts:
Is it only this one print? Is it Laminated? If so it could be that the print got stretched a little and is now outside the 5 degree skew tolerance.

How large is the print? Have you tried setting the base points manually?

 

[ABCPrinting]

I've had the same problem at times with my Graphtec. Trace over the crop marks with a felt pen. Has worked for me every time.

 

[Riskok]

I never got it to read all the crop marks. But I did set the basepoint deadcenter over the first crop mark and did a base point. This worked like a charm!