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Author Topic: Kinoton FP23 Sprocket Hold Down Question Mitchell Dvoskin Phenomenal Film Handler Posts: 1869 From: West Milford, NJ, USA Registered: Jan 2001 posted 05-12-2004 07:50 PM                     Is there any easy way to increase the spring tension on the hold down over the bottom sprocket on an FP23 (same as FP20)? The reason I ask this is I run a lot of older prints, some of which have thick cement splices that probably have been there for decades. These thick overlapping cement splices sometimes jump off the bottom sprocket because the hold down is not holding down tight enough, causing the projector to lose it's lower loop. I have no problem with tape or lab splices. Any suggestions would be appreciated. /Mitchell  |  IP: Logged Gordon Bachlund Jedi Master Film Handler Posts: 696 From: Monrovia, CA, USA Registered: Aug 1999 posted 05-13-2004 08:53 AM                        I have the same problem occasionally on my FP20s with prints that have shrunk. I believe the problem is exascerbated by the relatively large diameter sprocket, which is gentle on film but engages more sprocket holes than the smaller sprockets on most other machines. I will look into this. Let's keep in touch.  |  IP: Logged Larry Shaw Expert Film Handler Posts: 238 From: Boston, MA, USA Registered: Mar 2000 posted 05-14-2004 11:11 PM                        With one hand and either the special steel tool provided with new machines or a screwdriver, apply rotating force to the silver section of the sprocket pad pivot. With the other hand and a metric allen wrench, loosen the screw in the center of the pivot. Rotate the silver section to achieve the correct pressure. Tighten the screw. This procedure is in the FP-23 manual. Actually the correct fix here is to remake the bad splices; overtensioning is treating the symptom, not the disease.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 05-14-2004 11:57 PM                     "Actually the correct fix here is to remake the bad splices" _________________________________________________________________ Really now Larry, do either of those guys faces say to you.... "lets cut out a frame or two of that nice I.B. release print film for sake of a messy splice" I think in reality they'd both rather use rubber bands to hold the pad shut than loose a single frame of film..... Mark  |  IP: Logged Dan Lyons Jedi Master Film Handler Posts: 698 From: Seal Beach, CA Registered: Sep 2002 posted 05-15-2004 02:45 AM                     quote: Mark Gulbrandsen Really now Larry, do either of those guys faces say to you.... "lets cut out a frame or two of that nice I.B. release print film for sake of a messy splice" I'm assuming the problems are coming from shrunken cement splices. Many times i've found you can just peel the splice apart , then do a tape splice over the overlapped film, which will put the sprocket holes back into proper registration, and no frames have to be cut. Just make sure your pad rollers are set so they can handle an overlapped tape splice, which it should since i know all of you have modified your splicers to do overlap cuts. These type of splices run perfectly thru a Century and a Pro 35, I'd think the Kinoton should be able to handle those also. Danny  |  IP: Logged Mitchell Dvoskin Phenomenal Film Handler Posts: 1869 From: West Milford, NJ, USA Registered: Jan 2001 posted 05-17-2004 07:52 AM                     Thank you Larry. I even found my special adjustment tool in my box of Kinoton "I don't know what it is, but I may need it someday" items. One other question, in the manual, it describes setting the correct tension with a little spring scale gizmo. Where does one get one? Years ago, tiny hanging postal scales were sold everywhere, but not any more. Thank you Mark, you understand. /Mitchell  |  IP: Logged Richard Fowler Film God Posts: 2392 From: Ft. Lauderdale, FL, USA Registered: Jun 2001 posted 05-17-2004 09:37 AM                     Amtek-Chatillon guages - model DDP series would be your choice; should be available from any major industrial supply - tool distributor. My 30 year old unit is still doing a fine job  |  IP: Logged Larry Shaw Expert Film Handler Posts: 238 From: Boston, MA, USA Registered: Mar 2000 posted 05-18-2004 12:57 PM                        Sometimes one can find cheap-o scales of this type at fishing supply places.  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 05-18-2004 01:08 PM                        Fish scales (the weighing kind): http://www.bigskyfishing.com/Gear-Technique/spin_fishing/pages/fishing_scales0001.shtm quote: All of the fishing scales and fish measurement devices shown below are available through Cabela's. For pricing or additional information, simply click on any of the links. http://www.tackletour.com/reviewberkleyscale.shtm http://www.amazon.com/gp/browse.html/104-8390627-1917536?node=3409051&no=3408951&me=ATVPDKIKX0DER SMPTE Recommended Practice RP106 specifies Film Tension  |  IP: Logged Richard Fowler Film God Posts: 2392 From: Ft. Lauderdale, FL, USA Registered: Jun 2001 posted 05-18-2004 01:14 PM                     How many times do you have to wrap the barracudda around the reel hub to get an accurate torque measurement The scale I was mentioning allows for torque measurements on one end and pressure measurements ( such as gate pressure ) on the other  |  IP: Logged Dan Lyons Jedi Master Film Handler Posts: 698 From: Seal Beach, CA Registered: Sep 2002 posted 05-18-2004 01:25 PM                     Here is what i use to measure takeup and reel arm tension. spring scales I have the red, 1-20N version. They work great, and you can't beat the price! Danny  |  IP: Logged Richard Fowler Film God Posts: 2392 From: Ft. Lauderdale, FL, USA Registered: Jun 2001 posted 05-18-2004 03:35 PM                     At that price they should be given out to techies like tweakers  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 05-18-2004 04:31 PM                     Danny sent me one of those spring scales and it really does come in handy. Everyone run out and buy a couple!  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 05-18-2004 10:06 PM                     "Danny sent me one of those spring scales and it really does come in handy." _________________________________________________________________ Well yes, now that you mention it, I do quite a few service calls that are near some really nice trophy trout streams in both Wyoming and Montana , simply wonderful . So yes, they might actually come in handy once in a while!! Mark  |  IP: Logged

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