Press Curve Graphics Software
TT Graph is a signature analysis program that generates tonnage signatures and provides a simple approach for analyzing the signatures. Tonnage signatures provide a graphical picture of what is happening during the press stroke. The signatures can be resolver or time-based, depending on the type of monitor being used.
TT-Graph tonnage signatures help identify press and die problems such as:
- Off center loading
- Loose tie rods
- Gib chatter
- Loss of binder tonnage
- Die timing
- Worn weld beads
- Dull punches
- Bearing problems
- Nitrogen cushion wear
- Lubrication variances
Signatures
Signatures can be stored, recalled and overlaid with new signatures for comparison. Variances in the signature indicate potential mechanical press problems, die problems and subsequently off tolerance parts. When an alarm occurs, signatures are automatically saved when also using PressNet. This eliminates the worry of someone having to save it. Once it is saved, someone can look at it to pinpoint the problem and refer to it in the future if the same problem occurs.
Enveloping
Enveloping puts high and low tonnage limits around the actual tonnage signature throughout the entire press stroke. TT Graph can graphically show this for the N260 Series Production Monitors and SLIM. If the tonnage increases or decreases and either of the high or low limits are violated, an alarm occurs and the press will stop if you are using enveloping with these monitors. The limits are typically used more for die protection and part quality assurance than just press protection. A high enveloping fault may indicate slug buildup, material misfeed, etc. A low enveloping fault may signify a loss of nitrogen cylinder pressure, die wear, not enough shear on a punch, etc.
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