This post is a compilation of notes that I have on the LS (large sample) intro and specimen stage used on older PHI 5400 and 5600 LS systems.<\/p>\n
To Replace the LS Intro Ribbon:<\/strong> Adjusting the stage to the DOCK, LOAD and Bake-out positions.<\/strong><\/p>\n The Bake-out position is set to values where the stage has minimum load on all of the axis and cannot be changed. It is very important to set the stage to the bake-out position before removing the motors. If you take the motors off when the stage is not set to the bake-out position, serious damage to the stage can occur. Notes on the LS Stage (30-520) Operation<\/strong><\/p>\n Warnings! Great care must be taken during the operation of this stage. Stage Motion The stage may be moved by either adjusting a particular position Each of the stage motion parameters (X, Y, Z, Tilt, and Rotate) The stage may also be moved to one of four preset positions. Preset Positions When moving the stage with obstacles nearby and you are unsure of To reset the “Dock”, “Load” or “Home” positions, simply move to the Transferring the platen 1. To transfer the platen from the intro chamber to the stage: 2. To transfer the platen from the stage to the intro chamber: Operating Cautions and Hints 1. Always watch the platen and stage carefully through the view This post is a compilation of notes that I have on the LS (large sample) intro and specimen stage used on older PHI 5400 and 5600 LS systems. To Replace the LS Intro Ribbon: First remove the 4 screws that … Continue reading
\nFirst remove the 4 screws that hold the ribbon tape to the stage dock slider. These would be the back 4 screws (towards the feed-thru).
\nRemove the LS feed-thru knob.
\nRemove the LS ribbon feed assembly (about 8 7\/16\u201d bolts) and pull it straight back.
\nLoosen the 3 screws that provide tension to the wheel by backing them out all the way.
\nRemove the 4 screws that hold the screw assembly in place and remove the screw assembly.
\nThe old ribbon can be removed (2 screws compress the slot).
\nSpin the wheel in the direction that the tape would go into the system until the wheel stops. This is the Fully In position.
\nPut the new tape into the LS intro slot and attach it to the stage dock slider. Make sure that the slider can move in and out smoothly. Adjust the slider if needed until the motion is as friction free as possible.
\nRemove the 4 screws and pull the tape out of the LS intro.
\nInstall the new tape to the wheel in the Fully In position. Tighten the 2 screws to compress the wheel and hold the tape.
\nRe-install the screw assembly and tighten the 4 screws that hold it in place.
\nTighten the 3 screws by turning them in finger tight until there is a reasonable amount of tension on the wheel. There needs to be enough tension to hold the tape and spin it onto the wheel, but not so much as to make the wheel hard to turn.
\nWind the tape onto the wheel by spinning the wheel backwards. Guide the tape onto the wheel so that it goes on straight. Keep about 6 inches of the tape out.
\nReplace the LS ribbon feed assembly and gently guide the tape into the slot.
\nAttach the LS ribbon feed assembly with 2 bolts just to hold it in place for now.
\nReconnect the 4 screws and attach the tape to the stage dock slider.
\nInsert a screw driver into the feed-thru port and verify that the tape and stage dock slider move smoothly. Adjust if needed.
\nConnect the rest of the 7\/16\u201d bolts to the LS ribbon feed assembly and tighten all of the bolts. The seal is made with a Viton O-ring.
\nUse a new 1.33″ copper gasket and attach the feed-thru knob.
\nVerify that the ribbon moves easily and smoothly. If not, remove and inspect.
\nInstallation Complete!<\/p>\n
\nThe nominal values are listed below for DOCK, LOAD, Home and Bake-out. DOCK and
\nLOAD need to be set to line up with the LS intro ribbon. Home is set to a central location of the stage that it at the focal point of the analyzer.
\nIt is very difficult to line up the stage to the DOCK and LOAD positions when the system is under vacuum due to the limited visibility of the LS chamber.
\nSo, if you cannot get it to line up by making small adjustments to the Y, rotation and Z axis, then you will need to vent so that you can use a mirror and look down the intro into the system. When the system is up to air this is very easy to do.
\nNotes:
\nYou can fine tune the Y axis by removing the motor and manually centering the Y axis of the stage to line up with the LS intro ribbon. Then, set the Y axis motor to zero (0) mm and put the motor back on the Y axis stage micrometer.<\/p>\n
\n*********<\/p>\n
\nCareless operation can easily result in damage to the stage and\/or
\nvacuum system components. If you consider that the stage
\nmechanism is sensitive, common sense dictates that you must observe
\nevery motion carefully, and THINK before clicking a stage control
\nbutton and entering position parameter values. Loading and
\nunloading the platen are especially critical.<\/p>\n
\n************<\/p>\n
\nparameter individually, or selecting one of the preset positions.
\nThe preset position selection will adjust all position parameters
\naccordingly.<\/p>\n
\nmay be adjusted individually in two ways.
\n(1) By selecting the “Adjust” button
\nnext to the parameter, the stage will track the indicated
\nposition as you scroll it with the up\/down arrows. This generally
\nis the safest method for moving the stage when the platen is
\nclose to objects (x-ray source, analyzer nose, etc.) in the
\nchamber. However, it takes much longer to move long distances.
\n(2) By typing in the desired parameter position(s), then clicking
\non “Set” for one particular position parameter, or “Set All” for
\nall position parameters simultaneously. the stage will move
\ndirectly to that position.
\nThis is the fastest method for moving to a custom position, but
\nis also the most dangerous if the typed value(s) was
\ninappropriate considering any obstacles in that motion path.<\/p>\n
\nThree (Dock, Load, and Home)
\nmay be reset by the operator and the fourth (Bake) is set to a
\npredefined position and cannot be reset. They are described
\nas follows:<\/p>\n
\n1. “Dock” – puts the stage in position for sliding the platen on
\nor off of the stage itself from the intro chamber.
\n2. “Load” – raises the stage slightly from the “Dock” position so
\nthat the intro ribbon may be disengaged
\n3. “Home” – a user defined position, usually used to move back to
\na particular area currently under analysis. This
\nposition may be redefined whenever desired.
\n4. “Bakeout” – moves the stage to the position where all tension-
\ning springs are “de-energized”. The stage must be
\nmoved to this position before removing the motors,
\nsuch as just before a bakeout.<\/p>\n
\nthe clearances, watch and be ready to click on the “Stop” button
\nto halt the motion of the stage.<\/p>\n
\ndesired stage position that you wish to reset it to, then click on
\nthe “Reset (position)” button. It would be a very good idea to
\nnote the original settings of “Dock” and “Load” before resetting
\nthem, so that you can return to them if problems arise later with
\nthe new reset position.<\/p>\n
\n***********************<\/p>\n
\na) Set the stage to the “Dock” position.
\nb) Extend the intro ribbon until the platen is docked on
\nthe stage. The proper position can be felt by
\nthe engaging of a detent on the stage. The
\nplaten will extend out both ends of the stage
\nby equal distances.
\nc) Carefully, select the “Load” position. This will
\nincrease the Z axis slightly so that the ribbon
\ncan release.
\nd) Withdraw the intro ribbon.<\/p>\n
\na) Set the stage to the “Dock” position.
\nb) Extend the intro ribbon until it engages the platen.
\nc) Start to withdraw the ribbon. The platen should follow.
\nd) Continue until the platen is in the intro chamber.<\/p>\n
\n****************************<\/p>\n
\nports during transfers.
\n2. If the platen stops moving, or disengages the ribbon during
\nthe withdrawal, before the completion of the transfer,
\nattempt to move the platen back to the original position.
\nThen make a slight adjustment to one of the position
\nparameters (with the Adjust feature) and try again.
\n3. Be very cautious when making adjustments to the position
\nparameters when the ribbon is extended to the platen
\nand\/or the platen is half on\/off the stage. Make only
\nslight adjustments!<\/p>\n","protected":false},"excerpt":{"rendered":"