Edward Mathias
& Company

01928 739799

 01928 739191 info@edwardmathias.com

HOW TO SET IT CORRECTLY


Most plotters are delivered with a “standard” blade or Smart Knife
and with cutter offset set accordingly.


Most plotter users will only ever use one type of blade or Smart Knife and these
will usually work at the “default” setting [if it was originally set  correctly]


Sometimes you may need to use a different type of blade to cut thick or unusual materials and for reasons too complex to explain here that blade may be designed

to work at a different offset setting.


Also, for reasons too complex to discuss here the recommended offset settings should be used as guidance rather than be relied upon as absolute settings.


To get the best from your plotter especially when cutting fine detail or small text it is worth knowing how to set Cutter Offset correctly and to “fine tune” it.

AND IT IS SURPRISINGLY EASY TO DO


Many modern plotters have a routine built into their software or firmware to cut a test pattern which allows the user to check and “fine tune” cutter offset.

If you don’t know how to run the test [or if you have an aversion to reading manuals]
You could follow the procedure below.


CUTTER OFFSET COMPENSATION


Is it Important?

If your customers are happy to accept distorted text: NO.

If you want your plotter to cut correctly it is VERY important.

If you have a tangential cutter it simply does not apply.


What is cutter offset ?

The distance from the point at which a blade cuts to the point around which it rotates.


Why does it exist?

Without compensation for blade offset a drag knife cutter cannot cut sharp corners. See:- DRAG KNIFE CUTTERS


How is offset compensation achieved ?

All modern drag knife plotters have a routine, usually built into their firmware, to manoeuvre the blade on a path which compensates for the blade offset.


Is it automatic ?

ALMOST, but you must give the plotter the correct information about the offset of the blade in use. It is usually a distance between 0.25mm and 1.0mm

Graphtec Plotters use a different system,  See:- Setting Cutter Offset on Graphtec Plotters


What is the setting usually called ?

Blade Offset  -  Cutter Offset  -  Knife Tip Offset  -  Cutter Compensation


How is it set ?

On the plotter control panel [usually], may also be controllable in [some] software.


Recommended setting is usually supplied with the blade or Smart Knife.


Instructions for how to set it on your plotter can always be found in the manual !!!


The bottom of this page shows a test you may find helpful.

CHECKING AND SETTING CUTTER OFFSET


USE A MEDIA COLOUR ON WHICH IT WILL BE EASY TO SEE THE CUT


USE AN UNDAMAGED BLADE SET AT THE CORRECT PRESSURE


Do not release the pinch rollers or remove the media until all tests have been completed


USE THE RECOMMENDED OFFSET SETTING FOR THE BLADE IN USE

If you don’t know the recommended setting for the blade type use the default setting.


CUT A SMALL SQUARE -  about 20 - 25mm


CUT THE PATTERN AGAIN

At offset settings one and two steps above the recommended setting.

Do not change any other settings.


AND AGAIN

At offset settings one and two steps below the recommended setting
Do not change any other settings.


EXAMINE WHAT YOU HAVE CUT

Look at the corners - ignore start/finish corners.

Compare with examples illustrated and adjust accordingly.


NOTE

Cutter offset affects the sharpness of corners only.

It does not compensate for other inaccuracies or distortions.

OFFSET

IS

TOO LOW

OFFSET

IS

CORRECT

OFFSET

IS

TOO HIGH

These instructions are for setting the compensation for the offset of the blade in use

Depending on your machine the setting you may need to adjust is usually called

Blade Offset  -  Cutter Offset  -  Knife Tip Offset  -  Cutter Compensation

When trawling through menus you may see settings for offset angle and offset force.

They are not related to cutter offset.

They are for engineers only - do not adjust them.



Cutter Offset

Home Page Technical Info ◄◄◄ Back