HP Stitch S1000 User Guide - Page 226

Printing issues A spindle latch suddenly opens during printer operation If a spindle latch is not closed before starting the substrate load, or it is opened by someone after the spindle was already moving or while the substrate was under tension, the spindle can move out of place. Closing the latch in those conditions can cause an incomplete latch engagement, and then at some point the latch may spontaneously open completely. The best solution is to eliminate substrate tension, avoid spindle movement, and then close the latch properly. To do this, return to the substrate load/unload menu, ensure that the spindle is properly in place (in case of doubt, extract it a bit and then push it back fully inside again), then close the latch (the blue part should now go down completely). The substrate advances with a loud continuous sound of vibration A loud continuous sound of vibration during the substrate advance can be caused in the following ways: ● The input spindle is not applying tension. ● Wrong tension or vacuum settings result in an incorrect balance of forces on the main roller. If you hear this sound, here are some suggestions: 1. Check that the substrate you are using is the same as the one you have selected in the Internal Print Server. 2. Check that you are using the generic substrate presets for the category. The use of incorrect values may result in incorrect substrate behavior. NOTE: Only substrates with high friction along the platen or substrates that easily wrinkle with temperature need high output tension values. Check that your output tension is recommended for your substrate. 3. Check that there is no telescoping of the input roll. 4. Reload the substrate and try to minimize skew while loading. Check that you using the correct loading procedure. 5. Increase the input tension in steps of +5 N/m from the recommended setting for each category until you eliminate the issue. There is skew or telescoping on the output spindle Extreme skew (approximately 10 mm peak to peak) and telescoping in the output spindle while it winds can be caused in three main ways: ● The substrate has not been correctly loaded and aligned during the loading procedure. ● The roll loaded on the input spindle is skewed, and this skew is transferred to the output spindle. ● The roll loaded on the input spindle has been wound with different tensions at its two ends. Printing on rolls that are not wound accurately during manufacturing may lead to wrinkles and skew problems and, generally, this problem can be identified easily because you can see a loss of tension at one side of the substrate between the input roll and the main roller. In that case, see the relevant information provided in the section There are wrinkles and ink smears on the substrate on page 221. TIP: When suffering from extreme skew that tends to increase (normally with highly temperature-sensitive substrates), try to use a thicker core that is not deformed by the rubber traction grooves on the spindle when inflated. Then follow the guidelines below for reducing skew. 220 Chapter 12 Troubleshoot substrate issues ENWW