Kelmar RTV-8900: Difference between revisions

Kelmar RTV-8900 (view source)

Revision as of 21:59, 12 February 2019

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 *When winding backwards off the takeup reel, make sure to set the takeup direction to neutral and rotate the reel backwards with your hand (do NOT pull on the film to rewind it, which will cause cinch scratching). Reversing the motor direction to feed the film back for long distances is not advisable because it gives you less control, and it risk spilling film onto the floor.
 *The guide roller on the automatic rewind arm can sometimes help achieve a smoother wind for film that is spooling unevenly. However, for archival projection it is often better to remove the roller so that it is not an obstacle in the film path. If you do use it, clean it with alcohol before each use.
-*Always remove spindles when not in use. If someone walks into them, they are easily bent.
+*Always remove spindles when not in use. If a white roller is available, it will make dirt more visible (white kelmar guide rollers designed for interlocking are compatible with the auto-shutoff).
+*If someone walks into them, they are easily bent.
 ''Tip: In low humidity or when winding between two plastic reels, static can build up during rewind. While holding the film with your left hand to inspect it, you can ground yourself by placing the finger of your right hand on the edge of the throttle control knob where it meets the metal case. This will dissipate any static build-up and prevent you from getting shocked.''
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 [[File:Kelmar rewind spindles.JPG|right|thumb|300px|Kelmar rewind spindles. From left to right: 5/16" spindle with drive key, 5/16" spindle with drive pin, 1/2" spindle with finger hole drive.]]
 *Interchangeable spindles
-**5/16” with key
+**5/16” with key (standard spindle for reels up to 3,000’)
-**5/16” with extended key for plastic shipping reels
+**5/16” with extended key for plastic shipping reels (reduces wear on plastic keyway; especially beneficial for reels with detachable flanges)
 **5/16” with drive pin (also called a “reel dog”) for large reels
-**5/16” with finger hold drive
+**5/16” with finger hole  drive (large reels)
 **1/2" with drive pin for large 35mm reels (shorter than 70mm shaft)
 **1/2" with finger drive for modular platter reels
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 *Handle for manual rewind
 *Mounting bracket for a [[Neumade Film Measuring Machine]]
-*Screw mount on the front of the table accommodates a bracket to hold a Neumade frame counter. This allows the frame counter to align with the film path.
+**Screw mount on the front of the table accommodates a bracket to hold a Neumade frame counter. This allows the frame counter to align with the film path.
-*Replacement belts: 3L260 V belt - Available at most small engine repair shops.
+*Replacement belt
+**Belt size: 3L260 V belt
+**Available at most small engine repair shops
 ==Calibration==
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 To align the belt, adjust the position of the pulleys. The pulley on the drive shaft is secured by a set screw in the middle of the belt groove, and the pulley on the main shaft is secured by a set screw on the shoulder that extends from the pulley on the non-operator side.
-To align the belt, first make sure the pulley on the main shaft is backed up against the collar that holds the spindle detent, which is always in a fixed position on the shaft. Then adjust the drive pulley to align with the pulley on the main shaft.
+First make sure the pulley on the main shaft is backed up against the collar that holds the spindle detent, which is always in a fixed position on the shaft. Then adjust the drive pulley to align with the pulley on the main shaft.
+Run the motor at a low speed and check the alignment. If the alignment seems adequate, gradually increase the motor speed, visually assessing the alignment, checking for contact between the belt and motor standoffs, and observing for any noises or vibrations that might indicate that something is wrong.
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 ===Friction Clutch===
-Check periodically for dirt and wear. Remove the knurled nut, spring, and pressure plate. The felt pad is retained by a spring pin, which can be difficult to remove if there is significant dirt built-up. A small allen wrench can be used to gently drive the pin out if necessary. Remove the pin to free the felt pad. Clean the pad as necessary and replace it when worn. Clean the spring pin, pressure plate, and clutch plate, and check for wear. If the pressure plate is worn, it can be flipped to use the other side.
+Check periodically for dirt and wear. Remove the knurled nut, spring, and pressure plate. The felt pad is retained by a spring pin, which can be difficult to remove if there is significant dirt built-up. A small allen wrench can be used to gently drive the pin out if necessary. Remove the pin to free the felt pad. Clean the pad as necessary and replace it when worn. The pad can be cleaned with a spray degreaser like 409 or a degreasing dish detergent to keep it clean. Apply the degreaser, rub it in with a cloth to remove any oil, wipe it off and clean it with a paper towel, and rub it dry. Let the pad fully air dry before reinstalling. This should be done once a year if film is run infrequently. Always stock spare felt pads so that a worn pad can be replaced immediately.
+Clean the spring pin, pressure plate, and clutch plate, and check for wear. If the pressure plate is worn, it can be flipped to use the other side. If the clutch plate worn or pitted, super fine steel wool (0000#) can be used to smooth down the plate.
-Do NOT apply oil to the felt pad. This will attract dirt, and will cause the friction level to drift much faster than would occur due to natural wear on the felt pad. This throws the friction clutch out of calibration and requires re-oiling. An overly oiled pad will also spray oil when it rotates, making a mess and possibly leading to  [[print contaminant|print contamination]].
+Do NOT apply oil to the felt pad. This will attract dirt, and will cause the friction level to drift much faster than would occur due to natural wear on the felt pad. This throws the friction clutch out of calibration and requires re-oiling. An overly oiled pad will also spray oil when it rotates, making a mess and possibly leading to [[print contaminant|print contamination]].
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 ==Moving a Kelmar table==
-Kelmar tables are made of relatively weak materials, and are prone to damage if moved when fully assembled. Specifically, the particle board table top is easily stressed and the sheet metal braces are easily bent. When moving a Kelmar table for more than a short distance, it should be disassembled.
+Kelmar tables are made of relatively weak materials, and are prone to damage if moved when fully assembled. Specifically, the particle board table top is easily stressed and the sheet metal braces are easily bent. When moving a Kelmar table for more than a short distance, it should be disassembled. The table should always be moved by two people.
 Disassembly