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Summacut Measuring / Winding material wrong
Im not sure if the plotter is "measuring" the material but the situation is I have a lot of repeat parts to cut so I have set the shape up and set it to 10 repeats etc. Put the material in the machine , it goes off and winds the material through the rollers then back again , then starts fine. Sometimes mid way through the job , its stops cutting and winds more material through , then back again and continues cutting.
The issue is when it starts again mid job , the cut is 10mm or so out so it ruins the parts as it overcuts the last shape.
Is there anyway to stop it doing this "measuring / Winding " material through
I have 1500 parts to cut on quite expensive material and cant waste any.Thanks for your help – as we are not in the sign industry so not sure who to contact. The software is based on Signlab but its a custom version I think.
Mark
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10 Replies
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We’ve cut long lengths with this machine and Signlab and never had the problem with pre-feed. May be there is a setting to adjust in the software otherwise contact the machine supplier.
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Thanks Peter – We got the machine second hand – any recomendations on who would help ?
I guess I can try Summa Direct !Thanks for your assistance.
Mark
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I have just been reading through the manual for this , it says that when you send a cut it will pre feed the material in stages equal to the width.
Our material is only 200mm wide and it seems to spool out about 50cm at a time.
Something screwy going on !!
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My summa does that too…but generally spools through a few metres at a time…yet starts back exactly where it left off.
Summas are renound for their tracking so I suggest that either the dirty grit roller or worn wheels.
The other alternative is particularly slippery backing on the vinyl. I had issues with ARLON digital media moving around in the plotter when profile cutting.
Keep the speed DOWN and it’ll also help with accuracy…that’s controlled from within signlab – but also set the plotter speeds low by default….400mm/sec is plenty fast enough for general use. I drop it to 300 if doing slippery materials.
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Thanks David , will try slowing it all down. I would take the hit if it was my material , but its customer supplied and they are getting twitchy about wastage.
I will clean the rollers and slow it down to see if that sorts it.
Thanks again.
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I’ve never had a problem with accuracy on my summa, never more than a 0.nano of a mm that is now cured.
Personally I wouldn’t cut a customers vinyl, you just don’t know what cheap tat they’re buying and execting you to put through the cutter. I had an LG vinyl once, three logs.. the black was fine but, the white and red would always somehow run completely out of the cutters wheels, never did figure it out until I binned the remaining 25m rolls, only ever on those 2 LG rolls, wierd.
good vinyl – good results, Cheap vinyl….
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Hugh…I’ve only ever used LG’s reflective red many years back…from memory it had a very slippery coating on the back of the liner…tracked horribly.
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LG say no more
back to post
don’t run a summa (should do though) but check the page length in the software and the plotter settings as a back jump of 10mm sounds like the page feed margin length.
or turn the pre feed off and check the page length is longer that the cut run then make sure that there is enough slack material.welcome anyway
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You can check the cutter calibration in winplot (Summa software) also I’ve had problems with some materials slipping and causing undercutting but this has been only slight and not 10mm.
If the material is tough and you need a lot of pressure plus if your cutting speed is high it could make the problem worse.
Steve
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Thanks Chaps,
The speed was up at 700+ so I put this down to 300mm sec that seemed to help a lot , I think maybe the roll was too big and heavy for the rear rollers so that was causing a bit of friction so it didn’t come back to the same place.
Just ran a few now iand it seemd to work alot better.
Thanks all – a good reposnse on my very first post !!!
😛
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