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Author Topic: Cinemeccanicca Tower Motor Question Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 05-12-2003 08:27 PM                     Sad day here in the shops in Salt Lake City for the tower motor. She's a dead. Got the drive pulley off and tore it down only to find that the armature had a short between two sections of the commutators. Couldn't remove the short by cleaning between then either so he gets a new motor.... Mark  |  IP: Logged Daryl C. W. O'Shea Film God Posts: 3977 From: Midland Ontario Canada (where Panavision & IMAX lenses come from) Registered: Jun 2002 posted 05-13-2003 02:29 AM                        How'd you manage to get the drive pulley off Mark?  |  IP: Logged Jean-Michel Grin Expert Film Handler Posts: 222 From: Geneva & Lausanne, Switzerland Registered: Jul 2002 posted 05-13-2003 04:25 PM                        Hi Mark, One time I've experienced on a Cinemeccanica (< Thanks Antonio ) tower a ruined Bearing. No solution was able to replace the bearing. The only alternative for me was to replace the entire Motor unit It was cost a lot ! But few month later the manager of the theater called me to check an irregular noise on the tower: I discovered that the projectionist here; put the motor with the maximum torque on his pulley. He had ruined the bearing one more time.... Some realy bad projectionist should be fired out...  |  IP: Logged Antonio Marcheselli Phenomenal Film Handler Posts: 1260 From: Florence, Italy Registered: Mar 2000 posted 05-13-2003 06:20 PM                        mark You have to call it Cinemeccanica, while you call it cinemeccanicca you will never be able to extract it!  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 05-13-2003 07:08 PM                     It pressed right off with a larger arbor press. The motor would have been easily salvaged had the commutator not been shorted. The bearings are almost identical to those used in the Chrstie AW-3 drive motors. Its common, at least for us, to overhaul platter motors.....cut the commutator, install new bearings, and brushes, run it in at low voltage to seat the new brushes. We typically do around a dozen of all types a month. even the Strong/Potts/Stupid Platter motors are usually repairable! The tower motor lists for only around 400.00 U.S. which is alot less that I had imagined it wold be. Antonio, Sorry I could never spell in Italian very well for what ever reason..... Mark @ CLACO  |  IP: Logged Rick Long Jedi Master Film Handler Posts: 759 From: Toronto, Ontario, Canada Registered: Nov 1999 posted 05-13-2003 10:42 PM                     Thanks for the follow-up on this one, Mark.  |  IP: Logged Philippe Laude Film Handler Posts: 79 From: Longueville, Belgium Registered: Jul 99 posted 05-14-2003 07:34 AM                     Mark, Fabrice is absolutely right, this motor is used to run washing machines, mainly PHILIPS ones. The make of this motor is POLYMOTOR ITALIANA. It is a DC permanent magnet type and runs from 12V to 220V, from 500 to 22000 RPM with high torque even at low speed, that makes it very versatile, that's why it is used by other european manufacturers to run rewind benches, for instance. My tower is runned with such a motor and a friend of mines even built an electric go-kart for his son with the POLYMOTOR. The first pulley I had to remove from a shaft came out very easily, the second one would just not go away, I had to machine it off on a lathe. Here in Belgium it's not rare to find old washing machines that people abandon in front of their homes, for the garbage collectors to take away. I always have a look at old washing machines, each time it's a PHILIPS I take the motor apart(the motor itself is seldom the cause of the failure of the machine). This way I could satisfy several friends building towers like mine. [ 05-16-2003, 07:08 AM: Message edited by: Philippe Laude ]  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 05-14-2003 08:58 AM                     Philippe, How does a company like Phillips goes from making the worlds best film projectors to making washing machines????? Its a bit reminiscent of Strong also making chicken friers and road signs!! Mark  |  IP: Logged Ray Derrick Master Film Handler Posts: 310 From: Sydney, Australia Registered: Sep 2001 posted 05-14-2003 09:56 AM                     Mark, is there anything Philips doesn't make? That company is into more areas of technology than the CIA, and they are more globalised than the entire globalised economy. Antonio, I prefer "Cinemeclunka" , cos' that's exactly what their projectors do if you rip out the three power resistors across the motor start switch. Cinemeclunka is the only projector that needs a two-stage motor switch. Not to mention that their red-LED reverse scan readers underscan the soundtrack. C'mon guys, you can make Ferraris and yet you stuff up on something as simple as a film projector? What gives?  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 05-14-2003 05:25 PM                     Ray said "Cinemeclunka is the only projector that needs a two-stage motor switch." All projectors that have 3 phase motors require a slow start to reduce the start up torque Ernaman 8 and 9's had them The canadian U2 Bauers had them The Prevost had them The Wassman's had them THe better and newer method is they drive them on an inverter and that provides a smoother start up ramp The latest LED kits of theirs I installed had no problems with underscan  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 05-14-2003 07:14 PM                     "All projectors that have 3 phase motors require a slow start to reduce the start up torque" _________________________________________________________________ Better yet on these old machines install a solid state motor controller card to amke them do exactly what you want them to do Mark  |  IP: Logged Ray Derrick Master Film Handler Posts: 310 From: Sydney, Australia Registered: Sep 2001 posted 05-14-2003 07:49 PM                     Gordy you are being so argumentative lately. Ok, I admit there are others, but we don't see too many of the ones you mentioned in this part of the world. In fact, what is a Wassman? Never heard of that one. I thought that was a mountain behind Berchtesgarden. (Ah no, that's Watzmann I think). Also I was referring to Cinemec's reverse scan kit for the Vic 8 that slips into the bracket where the exciter lamp and lens used to go. Maybe they have fixed the problem recently but the ones we have dealt with, you can't get the lens close enough to the film because the bracket gets in the way (or is it far enough away? - I always forget). So you lose the extreme edges of the soundtrack and get peak distortion. The only way to fix it is to machine some metal off the clamp. Mark, some folk down here have been installing motor controllers to speed up the projector so they can squeeze another session in each day. Then they wonder why they start getting problems with digital.  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 05-14-2003 08:20 PM                     Wassman is a Spanish projector builder and they also make a line of THX approved speakers as well  |  IP: Logged Ray Derrick Master Film Handler Posts: 310 From: Sydney, Australia Registered: Sep 2001 posted 05-16-2003 05:01 AM                     Gordy, so why is it that the European manufacturers seem to generally go for 3-phase motors (at least in the past) and the US manufacturers seem to prefer single phase? Something to do with prevailing mains conditions?  |  IP: Logged Pete Naples Phenomenal Film Handler Posts: 1565 From: Dunfermline, Scotland Registered: Feb 2001 posted 05-16-2003 06:24 AM                     I dunno if I agree with that statement Ray, all of the old Westars, Cinemecannicas and Phillips that I service have single phase motors. Around here at any rate, it's the multiplexes with newer Cinemec or Century that have 3 phase motors without invertors. Of course there are plenty of 3 phase & invertors in the art house places.  |  IP: Logged

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