Problems with alignment in Autosampler G1367B

Question

I have a problem with a 1200 hALS that has lost its homing and positioning for the sample locations in the tray. Unit started up fine and then complained about x-axis not moving to right location. Suggested I service the X-Axis motor, encoder and sensor. I checked those were working. I did find hardened grease on the drive and cleaned and re-lubed with Lithium grease #2. Moving fine now. But it has lost it's 0,0 position. if fails after moving the sampling arm around after restart because it lowers into a sample well in the wrong position. I have tried a transport alignment in Agilent Lab Advisor software but it does not make it through the routine and opens the door in failure. Is there a way to do a hard reset so that I can make it through the routine? I found one for the G1367A but not the G1376B. Thank you for your help. Any body else have similar issues in the past. I would like to build a history file on this subject. /cfs-file/__key/communityserver-discussions-components-files/41/HPLC-1200-ALS-Fault-_2D00_-720WebShareName.mov

pungidenis · Accepted Answer

Hello, I guess you have problem with motor for X axis or broken/cracked motor pulley wheel or belt...since this is quite an old instrument I have seen a lot of them with problematic motor pulley wheel and belt. Cold start suggested from kbusch could help you if it is firmware/software issue, but if you have hardware problem then cold start wont help because your transport arm is not moving fast enough because motor pulley is broken or missing teeth. I suggest you try cold start, if this wont help you should take transport assembly out of autosampler, remove black plastic cover at the back and take a look at the motor on the left side of the assembly. Motor can be ordered

pungidenis · Answer

For cold start routine you just turn instrument OFF, set switches and turn instrument back ON. You dont need to start any aligment procedure. If autosampler could not initialize by it self then you have a HW problem and you need to take transport assembly out from autosampler and inspect X axis motor/belt/motor pulley wheel

pungidenis · Answer

install original plate (that has space for 2x54 vial and aditional 10 spaces for vials on the right hand side of tray , remove 54 vial inserts and do a transport aligment. I hope this will fix it

pungidenis · Answer

Hello, the only thing that comes to my mind is...heigh difference in vials and using option ˇˇIgnore missing vesselˇˇ in the method. Take your tray out and take a look at the vials placed in the tray...do you see any heigh difference between them? I once had the same problem with some cheap 2ml vials that were a few milimeters difference in heigh and autosampler was skipping them because it though that there is no vial present at that position and because option ˇˇIgnore missing vesselˇˇ in ALS method was turned ON the sequence did not stopped. Check this heigh and undo this option in the ALS method so you will get an error if vial is not recognized in tray.

Problems with alignment in Autosampler G1367B

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