GALLERY STRETCHER-240 Manuale di istruzioni - Pagina 16

Sfoglia online o scarica il pdf Manuale di istruzioni per Sistemi di imballaggio estensibile GALLERY STRETCHER-240. GALLERY STRETCHER-240 17.

the artwork flat. Pushing down will tend to force the canvas out of the grasp of the

clamping bar; this would be equivalent to increasing the stretching pressure past 50 psi.

Under normal operating conditions the Stretching Bar will rise a little above the top of

the Clamping Bar as the stretching pressure is increased. The closer the stretching

pressure is to the set point of the clamping bar the more likely it is to rise.

This is not an issue unless the bar remains in this position or there is excessive play. If

this occurs contact us.

Clamping Bar is lifting during stretch

Under normal operating conditions the Clamping Bar will tend to rise a little above the

top of the angle bar as the stretching pressure is increased. When the canvas is clamped

and being stretched there is a strong upward force that tends to pull the clamping bar

upward with the canvas. This is not an issue unless the bar remains in this position or

there is excessive play. If this occurs contact us.

Stretching Bar deflecting, or deflecting unevenly

This is also a normal response during a stretch. This Stretching Bar was purposely

chosen because of the amount of deflection it has, this conforms well to the rubber

extrusion. As for the uneven bar, this is more a matter of placement of the artwork. Try

position the artwork at the center of the machine and work from there, favoring one side

will result in an uneven travel but should not affect the quality of the stretch.

Canvas is not tight

How tight is tight? There have been many arguments regarding what is considered a

tight stretch. Canvas is very dynamic and is susceptible to atmospheric conditions, what

once was tight will soon be loose. Over-stretching a canvas will give the canvas memory