The Secret Society of Lathe Trolls

so..... with the wire connected to the new clock of the motor device I have a 1,2 sec change ... too fast, if I disconnect this wire I have 1,8 sec thats the correct amount. nevertheless I went back to my internal VMS 70 pitch computer, because the ZUMA did strange things: If I callibarte everythin...

Zuma question: My cooling fan has been dead past 4 yrs. do i need to replace etc? If you've been running without the fan for 4 years, I would'nt worry about it now. It should be alright. The early units had memory boards that generated a little heat, but the enclosure should have adequate ventilati...

Ok I check the time change with no wire connected on the weekend .. Should it have the the same rate ? Since I don't know how you're getting 60Hz pulse from motor controller, I want to make sure that you are actually synchronizing with it. If the rate doesn't change when you move it from your 60Hz ...

NO!. It has to be TTL level: a digital pulse 0 to +5 volts. OK, I now put a transformer between my Motor control device and the Sync input of the motherboard to get the TTL level. But what happened now is the the white light don´t change its status every 1.8 sec ( at 33,3rpm) as it was before but e...

You'll find an orange or orange/white striped wire that runs from a terminal strip in the power supply to the underside of the motherboard. Detach the power supply end of this wire and connect to a TTL level 60Hz frequency source. You can Google for crystal derived 60Hz clock circuit to use for thi...

[oh shit, my zuma runs with 110V and was used in the US before so I think my line frequency is wrong ( I'm in Germany) so I have to look for a frequency shifter. Or is it possible to change the line frequency setup with a jumper internally ? The computer is locked to the turntable 'clock'. For lath...

If there is little or no gain by using the Zuma, what is the advantage of using it? Perhaps I am not reading the posts correctly, but why spend extra money on something that has no value? I would love to hear more in general about the advantages of aftermarket pitch and depth. I run my lathe stock ...

so best is to use test tones. when that works fine you can not that much better. some basic test tones we use for pitch98 can be downloaded on their ftp.. but i dont know by heart the adress.. For the basic Zuma calibration, just record some mono 200 Hz 500 mS pulses about 3 or 4 seconds apart. You...

Not all Zumas are alike. Most Zuma's were programmed for a .6 revolution delay, so for 33 rpm it's 60/33.33 *.6 = 1.08 seconds. For 45 rpm it's 60/45 * . 6 =0.8 seconds. However several Zumas were built for .5 revolution delays for cutters that also VMS 80's in house. These of course will require a ...

Price is not the only factor. As you said, the last version of the Zuma was made approximately 14 years ago. What I am working on is a completely new computer integration project. And, I believe the final product will be flexible enough to be usable on many types of lathes, not just VMS systems. Th...

I get several inquiries a year about purchasing a new Zuma Computer, but no one wants to pay the price. Yes, it's true that the price of computer hardware has decreased drastically since 1979 when the first Zuma went into Capitol Records, but the market for disk cutting equipment has done likewise. ...