CETAC Z-Drive Nylon Cable Installation Guide Manual Part Number 610104 rev2, 2010-14 Teledyne Technologies Inc, Printed in USA
Overview This guide describes how to replace the nylon line which operates the autosampler Z-drive assembly. These instructions apply to many CETAC autosamplers. The appearance of your Z-drive may differ from what is shown in this document. Tools Required You will need the following tools: Small flathead screwdriver. Wire cutters, for trimming the cable. Small needle-nose pliers for removing the old cable. Tape measure. You can remove thumbscrews with tools if necessary, but do not tighten them with anything other than your fingers. CAUTION Do not allow the cable to bend sharply. Avoid pushing up on the probe bracket (zaxis slider) or pushing on the Z-drive cable. Doing so can kink the cable, in which case the cable must be replaced. Replacing the Cable WARNING Ensure the power turned off before proceeding with installation. 1 Place the autosampler on a flat surface and turn the unit off. Figure 1 Front view of ASX-520 autosampler. 2
2 Remove the old PEEK or nylon cable from the rotor by loosening the thumbscrew on the rotor. Figure 2. Removing cable from rotor. 3 Remove new cable from the packaging. 4 On the slider, cut the old cable or peek tubing in the exposed opening. Figure 3. Cutting the old cable. 3
5 Use needle nose pliers to slide the old cable out of the Z-axis drive assembly. Figure 4. Removing the old Z-drive tubing. 6 Slide in the cable and using the tape measure, cut to 43 inches, until it reaches the slider. Push the cable into the slider, guiding it through the second hole until it comes out of the bottom of the slider. Figure 5. Sliding in the new cable. Figure 6. Sliding the cable through completely. 4
7 Use the small flat head screwdriver to wedge between the slider opening and the new cable. Turn the screwdriver 90 degrees to form a bend in the cable. This permanent bend will hold the cable in place on the Z-drive slider. Figure 7. Affixing the cable to the slider. Figure 8. View of bent cable. 8 Cut the excess exposed cable on the bottom of the slider. Figure 9. Removing excess cable. 5
9 Feed the cable through the rear guide block, then tighten the PEEK nut to secure it. Figure 10. Tighten PEEK nut for cable casing adjustment. 10 Turn the rotor clockwise as far as it will go. Rotor Pin Stator Stop Figure 11. View of rotor with rotor pin at stator stop. 6
11 Slide the cable onto the rotor on the back of the autosampler (Error! Reference source not found.4). If needed, loosen the thumbscrew on the rotor to allow the cable to pass through the clamp. Figure 12. Sliding Z-drive cable into rotor groove. 12 Gently move the Z-axis slider until the gap between the slider and cap is approximately 3/32 (~2mm). 3/32 (~2mm) Figure 13. View of gap between probe bracket and cap. 7
13 Center the Y-arm tube in the autosampler X-travel slot in order to properly adjust the drive cable. This step applies to all models of ASX-500 series autosamplers. X-travel slot Figure 14. Arm centered for cable casing adjustment. Figure 15. Proper cable orientation. 8
14 Hold the cable flat against the rotor and secure the cable by tightening thumbscrew on the rotor. Maintain the 3/32 (~2mm) gap while the rotor pin is making contact with the stator stop (full clockwise rotation of rotor). The thumbscrew should be as tight as possible using just your fingers. Figure 16. Securing cable to rotor. 15 Rotate the rotor back and forth to ensure that it moves freely. Ensure that the full width of the cable is under the clamp. Clamp Figure 17. Verifying cable movement and cable clamp. 9