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16 

Stretcher Bar is Hanging Up 

 
In nearly every case this is caused during transit, the cylinders and their mounts are 
“forced” out of alignment.  This is best resolved over the phone.  
 
If you are experiencing this problem please do not hesitate to contact us at 614-861-4582 
and ask for Dave. 
 

The Canvas is slipping during a stretch 

 
The Clamping Bar is preset to 50 psi, located beneath the deck; this regulator 

should not 

be tampered with

 unless you have been instructed by us to do so.  Changing this setting 

may cause severe damage to the Clamping Bar and will void your warranty. Do not 
change this setting. Most stretches are done at no more than 30 psi; this will produce a 
nice tight stretch with giclee canvas.  Heavy canvas and oversized art may require more 
pressure, but it should not exceed 50 psi.  That is why we have preset the clamp to 50 psi 
this will allow for a certain degree of “slip”.  If the clamp is preset to 50 psi and the 
stretching pressure exceeds 50 psi, then there will be slipping. 

 
Stretcher Bar is lifting when stretching 

 
This is by design.  Smaller artwork will tend to rise very easily and large artwork may not 
rise at all, but that is fine.  Typically, the artwork will rise about 3-4”, as shown in the 
photo below.  The operator should not “push down” on the artwork in an effort to keep 
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.  
 
 
 
 
 
 
 
 
 
 
 
 
 

Summary of Contents for 36

Page 1: ...e 95 psi If you are using a pneumatic staple gun please be sure to provide what the manufacturer recommends this may require you to provide a 2 way manifold All of the air cylinders have been thorough...

Page 2: ...pedal on the floor position pedal where it can be easily reached 3 Plug hose with NPT fitting into your supply manifold or air compressor See Safety Precautions 4 Plug the hose with no fitting into th...

Page 3: ...s in a high production workshop In the photo below one company assigns their personnel into Pods which consists of 4 personnel and 2 machines at right angles One person does the starter course 2 perfo...

Page 4: ...so that the outside edge of the top bracket is touching the line Now measure 21 125 to the right of the centerline and install right hand bracket The span between the left and right top brackets shou...

Page 5: ...our stretching machine are as follows Stretcher Plates Slotted Stretching Bar Operated by toggle Switch on far right Clamping Bar Operated By Foot Pedal Pressure Gauge Indicates Stretcher Pressure Air...

Page 6: ...into the slots of the stretcher bar as shown below Setting up Stretcher Plates Video http www youtube com watch v 94rntl0C0rY Position both stretcher plates in the middle of the stretcher bar Favoring...

Page 7: ...me and the plates together in and out until the face of the wooden frame is approximately 5 8 behind the angle bar In other words create a gap so the canvas would waterfall down into the opening when...

Page 8: ...this position the stretcher bar should extend approximately over the front of the angle bar In summary the plates should be behind the angle bar and in front of the bar by approximately in either the...

Page 9: ...and make a second fold along the image 3 Place the assembled stretcher frame on the artwork and slide it against the first crease Then slide the outside rail against the second crease This is the fas...

Page 10: ...parallel to your edge Adjust air pressure of staple gun so that the staples due not penetrate the canvas 6 Place the stretcher frame on top of the stretcher plates with the starter course away from t...

Page 11: ...e rails will result in an uneven stretch a few inches left and right of center Art larger than 30 may require moving the plates farther apart but try to avoid moving the plates toward the outside rail...

Page 12: ...start the stretching process Be sure to maintain control of the stretcher frame with your free hand It should rest on the outside rail applying only light pressure The stretching pressure should be no...

Page 13: ...si 13 When you are satisfied with the tension you can staple the canvas to the frame with a long nosed pneumatic staple gun shown in the photo below The staple gun is operated upside down and the trig...

Page 14: ...etch Removing the excess canvas is the recommended method and provides the best results Cutting Excess Canvas 1 After the first stretch remove the artwork and lay it facedown on your work surface as s...

Page 15: ...r with your machine Clamping Bar Not Closing The Foot Pedal operates like a light switch in this case it is air and not electricity When you first apply air to your machine with the foot pedal connect...

Page 16: ...preset the clamp to 50 psi this will allow for a certain degree of slip If the clamp is preset to 50 psi and the stretching pressure exceeds 50 psi then there will be slipping Stretcher Bar is lifting...

Page 17: ...to it s original condition Our belief is that stretching light giclees at 15 20 psi is more than sufficient and that heavy canvas should be no more than 30 40 psi Stretching Large Art Artwork larger t...

Page 18: ...our machines https www dropbox com sh eldx51ety4j30wv w2P2C mvWS GalleryStretcherManual 36 60 pdf https www dropbox com sh eldx51ety4j30wv UrKPtZtrv2 Key 20Points pdf https www dropbox com sh eldx51e...

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