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ND 543 MAGTAPE DRIVE 1600-6250 bpi¶

ND 537 MAGTAPE FORMATTER¶

ND 560 MAGTAPE CONTROLLER¶

Introduction¶

The ND 543 - Magnetic tape drive, the ND 537 Magnetic Tape Formatter, and the ND 560 - Magnetic Tape Controller constitute one of the leading minicomputer tape systems in the market. The formatter and drive are delivered by Storage Technology Corporation, a well reputed producer of computer peripherals.

Features¶

Up to four drives on each controller
May be upgraded to 3 densities, 800-1600-6250 bpi
(Upgrade kit for magtape drive: ND 549, upgrade
kit for magtape controller: ND 549)
Speed 125 ips
In a multiple drive system, the formatter can
handle a mixture of densities
Automatic thread/load for both open reels and
easy-load cartridges
Single vacuum assisted capstan
Dual vacuum columns
Dual gap READ/WRITE head and full width ERASE head
Quick release, positive action file reel hub
Vacuum assisted tape cleaner
Microprogram controlled tape unit sequencing
and, diagnostics
Resident maintenance controls
Power window - automatic closing and opening
on load and unload operations
One drive may rewind without blocking the others
on the same controller

Product Description¶

A two-phase digital tachometer in the capstan motor provides precise tape positioning and stop-lock control, at an accuracy of 0.00565 inches.

For speed control, tach pulses are compared to a crystal clock pulse.

In addition to automatic thread/load, extraordinarily accurate tape loading is assured by a minimum length, straightshot, gravity-assisted tape path. Tape acceleration is kept to a minimum by a microsequencer-controlled liner reel servo system.

Tape drag and tape edge damage is minimized by the use of hydrostatic air bearings at all critical points. A hydrostatic rewind foot prevents tape and head wear during high speed rewind. And a unique tape footage counter, in conjunction with the digital tack and microsequencer, smooths tape acceleration and deceleration for faster and gentler rewind.

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Specifications¶

Tape Format¶

ANSI Compatibility.

Read and write as specified by ANSI X3.39-1973 (PE) and ANSI x3.54-1976-(GCR).

Tape Motion Performance¶

Rated velocity: 125 inches per second nominal

Magnetic Tape Media¶

Should conform to ANSI X3.40-1976, i.e. 1.5 milli inch thick tape. 2400' on a 10 1/2" reel.
Velocity variation: +/-4% of the rated tape velocity
Rewind time: 60 seconds to rewind a 2400 foot reel

Drive and Formatter¶

Parameter	Specs
Voltage	120 VAC, 22 Amps
	220 VAC, 12 Amps

Drive¶

Parameter	Specs
Voltage	120 Vac, 15 Amps
	220 Vac, 7.5 Amps

Physical Requirements¶

Height: 1687 mm
Width: 600 mm
Depth: 910 mm
Weight: Approx. 150 kg

Environmental Requirements¶

The following requirements apply to the magnetic tape unit only. The environmental requirements for the magnetic tape media is given in ANSI X3.40-1976.

Temperature¶

Condition	Range
Operating	+16°C to +31°C (+60°F to +90°F)
Storage	+2°C to +50°C (+36°F to +122°F)
Shipping	-40°C to +70°C (-40°F to +158°F)
Optimum	+16°C to +22°C (+60°F to +72°F)

Relative Humidity¶

Condition	Range
Operating	20 to 80%, non-condensing
Storage	10 to 90%, non-condensing
Shipping	Any, non-condensing
Optimum	37 to 42%, non-condensing

Duration¶

Storage: The storage environment must not be outside the limits of the operating environment for a period longer than 6 months
Shipping: The shipping environment must not be outside the limits of the storage environment for a period longer than 72 hours

Thermal Change¶

The magnetic tape unit must not be subject to a temperature change greater than 16°C (27°F) per hour, non-operating or 5°C (9°F) per hour operating.

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