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a few ‘small’ cutting issues on my Summa D60
Hey all,
this has been a bit of an issue for a while – on small lettering and certain files, to try and rectify… I have recently (2-3 months) put in a new cutting strip, blades are ‘smart knives’ and changed more regular than probably needed – would imagine they’re usually changed due to this issue, rather than not cutting cleanly.
the letters in this instance are no cutting neatly, as you can see, I have another issue where the cut (over about 6-12") is not meeting up correctly at the start finish point.
can you give me any idea on where / what to look at and how to inspect please?
thanks in advance,
Hugh 🙁
ps, the outer box is supposed to be jaggedy (customers – go figure!), the text is around 7-8mm tall, the yellow strip about 20mm wide, so we’re looking at around .5mm out. not an issue on large letters but it auto weeds the little ones when weeding!
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11 Replies
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just checked carriage, no discernable movement in it (other than vertical), blade holder is sound.
grit rollers are clean, pinch rollers clean but … maybe worn? I’ve no idea how thick the rubber part of the wheel should be – or even if it’s making any odds.
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I would check the blade offset.
Check that all grub screws on any gears that the motor drives are tight.
Get new rollers.Clean the bloody thing :lol1:
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it’s only dust!
speed 200mm PS,
offset .48mm – as per smartknife specs.everything else as per factory- except variable blade pressures.
cheers,
Hugh -
hi hugh
were the yellow ones cut across the plotter
on the old summas the grit roller was held in place on the drive bar by a few grub screws and you guessed it they come lose.
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Hugh I know you have the offset set to blade details but have you performed the offset test to see what it’s like?
Cheers
Tim. -
quote Chris Wool:hi hughwere the yellow ones cut across the plotter
on the old summas the grit roller was held in place on the drive bar by a few grub screws and you guessed it they come lose.
Hi Hugh
One way to check would be to try holding the long grit roller still while trying to rotate the other grit rollers If there is any movement then there is a loose set screw (grub screw). I ‘ve attached a photo of the set screw, they are accessible without disassembling anything.
I’ve also attached photos of my pinch rollers for you to compare. I tried to get an angle showing the amount of wear but I think the shadow might show that there is less wear than there actually is. I know that if i leave vinyl in the plotter for a few minutes without cutting something there will be mark in the vinyl where the vinyl was pinched.
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thanks Guys, will check those things but, they do seem ok. Chris, I’m not sure what you mean – ah, yes I do! they are cut in columns of 25 wide so, cut in line with the film – not across it.
grit rollers could do with a clean but I don’t think thats affecting the cut.
I spent a while on the pone to Harry at Edward Mathias last night, from the descriptions he thinks it’s the two smaller X Y belts that need replacing, I’ll try that first. he’s seen these photo’s and think the pinch rollers are fine.
the other possibility is the solenoind (blade carier) has a damping rubber washer for it’s home position, this wears and the blade has further to travel to the material, only talking nano bits and time but could be enough to mess up.
I think everyone agrees that Harry knows his onions on these cutters so I’ll do the belts first, if it still does it i’ll look a bit deeper.
only thing that seems strange to me is the errors (from memory) only happen on the left side of the cutter.
cheers,
Hugh -
Hugh
I had a similar problem with my Roland plotter. It turned out to be the bearing in which the blade turns was worn.
Try that. You might find the blade rocks in its holder. That will be the bearing gone.Having said that I am totally unfamiliar with Summa machines, they might be a totally different setup. Worth a mention though.
Simon.
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I have just read the part where you say you have already checked the blade carrier. My bad!
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no worries Simon!
for reference, it’s a drag knife cutter, using ‘smartknives’ which are a 3rd party blade system, use, blunt, exchange!
regards,
Hugh -
Hi Hugh
On the subject of wonky lettering. Watch the machine and vinyl as it cuts.
I always make sure the edge of the vinyl is passed the cutting grove, as sometimes the vinyl hits that and lifts up alittle/pushes back.
Also by polishing the machine you also make the bit infront alittle more slippy and gets rid of static building up, We have to do this on the mamaki as the static hold the vinyl while printing and can cause problems.
denise x
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