Bisque Paramount ME Replacement And Troubleshooting Download Page 13 | Manualshive

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make note of the slotted hole (on the top side here) and the pivot point (created by the
bottom mounting screw).

Figure 13: Removing the two screws that mount the speed reducer and motor assembly.

Figure 14: The right ascension homing sensor housing is now accessible for cleaning, removal and

replacement.

When the two sensor housings have been removed assemble the new sensors. Then the
two units can easily be re-installed.

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Summary of Contents for Paramount ME

Page 1: ...e position and will continue slewing until a limit position is reached At that point the control system detects an error condition and begins to beep continuously Failure to locate the home position can be caused by Any physical barrier most commonly excessive grease after lubricating the mount blocking the optical sensor Remove the impediment by cleaning the homing sensor to restore functionality...

Page 2: ... will not interfere with the sensor Declination Motor Cover Removal Figure 2 Remove these five socket head cap screws Using a 5 32 inch hex wrench remove the two 5 32 inch socket head cap screws in Figure 2 Using a 1 8 inch hex wrench remove the three remaining socket head cap screws Removing the declination cover reveals the declination motor At this point we recommend also removing the back port...

Page 3: ...lling inside Figure 3 Cover the cable access hole inside the red circle on the photo with masking tape to prevent screws from falling in Once the motor wire access hole is covered with tape use the 3 32 inch T handle wrench to remove the seven 3 8 inch socket head cap screws as shown in Figure 4 Declination axis motor Declination axis balance knob Access hole ...

Page 4: ...oes not slip When the cover has been completely removed rotate the declination axis in either direction until a hard stop is encountered By doing so the mount s internal homing sensor index that is part of the gear is completely out of the way of the homing sensor The next step is to remove the two 7 64 inch socket head cap screws that mount the speed reducer to the worm block assembly as shown in...

Page 5: ...ucer to be rotated around a pivot point created by the upper screw Rotating the assembly counterclockwise as viewed in Figure 5 allows belt on the reducer s pulley to be easily removed During reassembly be sure to rotate the speed reducer fully clockwise as viewed in Figure 5 about this pivot point to restore the original tension in the larger belt The declination axis motor and speed reducer can ...

Page 6: ... Figure 6 Location of the declination axis homing sensor looking toward the top of the declination axis from the bottom The homing sensor housing holds the optical sensor in place This is the homing sensor itself Wires are attached to the sensor ...

Page 7: ...ndard hex wrench to remove the two socket head cap screws that are located near the flat surface of the declination housing Figure 7 Remove the four socket head cap screws that hold the sensor housing in place Optical sensor ...

Page 8: ...rectly by rotating 90 degrees in either direction when the declination axis rotates the mechanical index on the gear will run into the side of the optical sensor and damage it Use a piece of tape or permanent marker to scribe the correct orientation of the housing with in the axis Here is a close up view of the sensor in the sensor housing Note the orientation of the sensor before removing the mou...

Page 9: ... The assembly fits very snugly and can be difficult to remove Do not pull in the homing sensor wiring to remove the homing sensor housing Insert the end of the needle nose pliers and orient them parallel with the long axis of the oval hole in the homing sensor housing Use outward pressure on the needle nose pliers to capture the homing sensor housing Figure 9 and extract it Mark the orientation of...

Page 10: ...rotate the optical sensor 90 degrees to remove it from the housing Cleaning the Optical Sensor The red arrow in Figure 10 marks the location of the optical path that must be clear of grease and other foreign matter for the sensor to function normally Before removing the homing sensor housing or the speed reducer try using a can of compressed air to clear the optical path Insert the compressed air ...

Page 11: ...ascension axis balance knob to separate the worm from the gear so that the mount swings freely As always use appropriate caution Next see Removing the RA and Dec Side Panels in the Paramount ME User Guide http www bisque com sc media p 28169 aspx for details how to remove the side panel If you wish to check the integrity of homing sensor cables or want to try cleaning out the right ascension axis ...

Page 12: ...d to access and easily remove the speed reducer Figure 12 Remove the lower panel to access and remove the speed reducer Raise the mount s polar axis until the 1 8 inch socket head cap screws in the bottom of the lower side panel are aligned with the holes in the wedge Remove all eight screws and remove the lower side panel Note that passing the socket head cap screws through the holes in the wedge...

Page 13: ...g screw Figure 13 Removing the two screws that mount the speed reducer and motor assembly Figure 14 The right ascension homing sensor housing is now accessible for cleaning removal and replacement When the two sensor housings have been removed assemble the new sensors Then the two units can easily be re installed ...

Page 14: ...eclination axis IMPORTANT ASSEMBLY NOTES Do not over tighten the two button head cap screws that hold the plastic sensor in the housing Over tightening the two screws will deform the optical sensor Also tighten each evenly as opposed to tightening one completely then the other Remember that the sensor orientation is critical The longer teal colored cable is for the declination axis homing sensor B...

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