Summa Thru-Cut Not Cutting Correctly

[AfroChild]

Hello.

I have a summa S3-T140.
I do a lot of Thru-Cut on it.
When it was new, the cuts were perfect.
After a few changed Knives, the thru-cut is not that perfect anymore. It has a spos, where the sticker remains stuck.

I changed the strip with a new one (a tehnician did it)
I changed the knife, also did an offset calibration, opos calibration and still not ok.

 

[balstestrat]

Clean the grit rollers.

 

[AfroChild]

Clean the grit rollers.

Already tried this. still the same

 

[FrankW]

knife calibration?

 

[AfroChild]

knife calibration?

The offset calibration? Looks good.

 

[balstestrat]

The offset calibration? Looks good.

 

[AfroChild]

View attachment 178455

I did those calibrations and they look good.

 

[jerry369]

what full pressure did you set? and flex velocity?
if possible try to reduce one of the two or increase the space between the shapes

 

[AfroChild]

Incresed the space between the shapes. still not working

Full presure 320g, and flex velocity 200mm/s.

They are not dropping from the support.

 

[jerry369]

I'll try by reducing the flex velocity, you can also enable multi pass to reduce the pressure or use a different knife (45°)

Unfortunately with flexcut there is no certain rule to get a good cut, the only rule is ...trial and error

 

[AfroChild]

I tried also.

Flex Cut Was perfect when the cutter was brand new.
With the same 36 degree knife.
It looks like im missing something, but I dont know what.

Also I saw summa doesnt have a Technical Support Online.

 

[Graphic Extremes]

Maybe the blade is not out far enough. I have done this and went up on the pressure. 320 seems a bit high to me for full pressure, I have never had mine up that high.

 

[AfroChild]

It is laminated vinyl, 100 + 100 microns

 

[PHILJOHNSON]

I would shorten your gap(full length) and tab(flex length) distances and also ensure that your flex pressure is around 70-80 grams less than your full pressure. The pressure does seem a bit high for a 3 mil vinyl, so you could try increasing your blade depth just a bit(maybe a quarter rotation worth) and tailing off the pressure just a bit(maybe 250 full pressure and 180 flex pressure with the slight increase in blade depth).

Best regards,

Phil Johnson
Airmark Corporation
(800)527-7778, ext. 112
philj@airmark.com

 

[Graphic Extremes]

Blade depth seems right to me, since the problem started with the blade changes