Obsolete Industrial


Pratt and Whitney Tape-O-Matic

Pratt and Whitney Tape-O-Matic
« on: November 06, 2017, 08:57:PM »
Hello guys,
I know this is an industrial long-shot, but does anyone have technical info or a service manual for any of the old Pratt and Whitney Tape-O-Matic equipment. I have an old tape-o-matic machine with a lot of tapes.

The machine is rock solid and hasn't been used in years. I'm hoping to resurrect this system with any investment right now. I can invest money into a controls upgrade as early as next year, but for now I'm hoping to get the tape portion of the control working again.

The tape reader won't read the tapes, reels turn but the tape just feeds through and the controls don't respond. All the servos on the machine work fine in manual mode.

Any tape-o-matic tech support would be greatly appreciated. Thank You!


Re: Pratt and Whitney Tape-O-Matic
« Reply #1 on: November 14, 2017, 09:04:PM »
Here's a classic NC tape reader:



I have an old tape-o-matic control manual, give me some time and I'll post what I can. It's falling apart, and I don't refer back to it all that often these days.

« Last Edit: November 15, 2017, 06:20:PM by alexrodgers »
Regards,
Alex
(Minnesota maintenance Technician)

Re: Pratt and Whitney Tape-O-Matic
« Reply #2 on: November 15, 2017, 08:43:PM »
Pratt and Whitney Tape-o-Matic Troubleshooting Guide, Faults, and Remedies



PROBLEM: No High Speed in both plus and minus jog, medium and low speed OK CAUSE: fault in Pilot Relay REMEDY: X Axis - Cards A01, D12 and Y Axis - Cards A23, D16

PROBLEM: No High Speed in both plus and minus jog, medium and low speed OK CAUSE: overload tripped REMEDY: X Axis - Reset Overload #1, Overload #2 in Panel #1 or Y Axis -  Reset Overload #3, Overload #4 in Panel #1

PROBLEM: No Hi Speed in Plus Jog Only CAUSE: Fault in Motor Logic REMEDY: X Axis - Cards A01, F03, H16, F06, F07 or Y Axis - Cars A23, F19, F22, F23, H32

PROBLEM: No Hi Speed in Plus Jog Only CAUSE:  Fault in Motor Logic REMEDY:  X Axis - Cards A01, F08, H01, F07, F03 or Y Axis - Cars A23, F19, F23, F24

PROBLEM: No Medium and No Low Speed in Plus and Minus Jog (X and Y Axes) CAUSE: Fault in Oscillator (can be checked with a proboscope) REMEDY: Cards D27, D28, D31

PROBLEM: No Medium and No Low Speed in Plus and Minus Jog (Either X or Y Axes) CAUSE: Bind in Lead Screw Coupling REMEDY: Check alignment of coupling rods to slide (loose huts)  AC motor belt too tight

PROBLEM: Low Torque or Stepping Motor Oscillation CAUSE: Loose Connections in Stepping motor Circuit  REMEDY: Check Field Current Resistor Terminals on #4 Panel or Check the terminal connections of diodes on machine terminal board (rear of machine base)


« Last Edit: November 15, 2017, 09:24:PM by alexrodgers »
Regards,
Alex
(Minnesota maintenance Technician)

Re: Pratt and Whitney Tape-O-Matic
« Reply #3 on: November 15, 2017, 09:23:PM »


PROBLEM: Low Torque or Stepping Motor Oscillation CAUSE: Low +14V Supply REMEDY: Loose generator belt

PROBLEM: Low Torque or Stepping Motor Oscillation CAUSE: X Axis Amplifier REMEDY: Cards A02, A03, A04, A05, A07

PROBLEM: Low Torque or Stepping Motor Oscillation CAUSE: Related Control Logic REMEDY: Cards F04, F08, F09, G02, G04, G05, E01, E02, F05, F06, F10, F11, F12, F13, F14, G07, G10, G12, G14

PROBLEM: Low Torque or Stepping Motor Oscillation CAUSE: Y Axis Amplifier REMEDY: Cards A17, A19, A20, A21, A22

PROBLEM: Low Torque or Stepping Motor Oscillation CAUSE: Related Logic REMEDY: Cards E17, E18, F19, F20, F21, F22, F23, F24, F25, F26, F27, F28, F29, F30, F31, F32, G18, G21, G22, G23, H25

PROBLEM: High Speed Only when Calling for Medium or Low CAUSE: Fault in Motor Logic REMEDY: Cards

PROBLEM: High Speed Hunting CAUSE: No Dynamic Braking REMEDY: X Axis - Check 1 Cap, 2 Cap, and Connections #3 Panel or Y Axis - Check 3 Cap, 4 Cap, and Connections #3 Panel

PROBLEM: High Speed Hunting CAUSE: Fault in Motor Logic REMEDY: (see preceding troubleshooting checks)

PROBLEM: No Set Light when Both X and Y Setup Buttons are depressed CAUSE: Failed Set Lamp or Related Logic REMEDY: Replace Lamp or Cards D08, D12, D14, D15, E30, F01, F17 

PROBLEM: No Set Light when Both X and Y Setup Buttons are depressed CAUSE: Fault in Clock Oscillator (Can be Checked with a Proboscope) REMEDY: Cards B14, B15, B16, B17

PROBLEM: No Set Light when Both X and Y Setup Buttons are depressed CAUSE: Loss of 1 or more clock signals due to 1 or more line drivers REMEDY: Cards A11, A12, A13, A14

PROBLEM: No Set Light when Both X and Y Setup Buttons are depressed CAUSE: Fault in Marker Generator (Can be Checked with a Proboscope) REMEDY: Cards E04, E05, E06, E07, E08, E09, E10, F02, F03, F06, F08, F09, F11, F12, F13, F14, F15, F16, F18, F19, F2, F24, F25, F27, F28, F29, F32

PROBLEM: No Set Light when Both X and Y Setup Buttons are depressed CAUSE: Faults in Recirculation Gate REMEDY: X Axis - Card G07 or Y Axis - Card G23

PROBLEM: No Set Light when Both X and Y Setup Buttons are depressed CAUSE: Fault in Setup Gate REMEDY: X Axis - Cards G08, H10 or Y Axis - G24, H26

PROBLEM: No Set Light when Both X and Y Setup Buttons are depressed CAUSE: Fault in Copy Gate REMEDY: X Axis - Cards G07 or Y Axis - G23

PROBLEM: No Set Light when Both X and Y Setup Buttons are depressed CAUSE: Fault in Special Set Up Gate REMEDY: X Axis - Card H11, H12 or Y Axis - Cards H27, H28


« Last Edit: November 15, 2017, 09:27:PM by alexrodgers »
Regards,
Alex
(Minnesota maintenance Technician)

Re: Pratt and Whitney Tape-O-Matic
« Reply #4 on: November 16, 2017, 05:44:AM »
Thanks for posting the troubleshooting tips, they may come in handy down the road. My problem at the moment all lies within the tape reader. It just ignores the tape and feeds it through.

Re: Pratt and Whitney Tape-O-Matic
« Reply #5 on: November 16, 2017, 06:55:PM »
Thanks for posting the troubleshooting tips, they may come in handy down the road. My problem at the moment all lies within the tape reader. It just ignores the tape and feeds it through.

If your tape reader has the bulb in the reader head, it may just need to be replaced.  If the bulb is burned out, it obviously needs replacing. But I have also seen the bulb get dirty or dim and still light up, yet it doesn't produce enough light to register the tape. The bulbs I'm thinking of looked like an old dome light bulb out of a 1970's Chevy. I think it may have even been a 12V bulb.

Regards,
Alex
(Minnesota maintenance Technician)

Fix it for Less... Search eBay Industrial