CNC_0016

BUY: Shop Equipment - CNC - Workstation - Servomotor c/w Encoder - Tamagawa TRE

Usage:

Proposed for X-axis

Now, consider using this for the A-axis and use a motor plus planetary gearbox for the X-axis drive.

Information:

Combined Servomotor and Encoder, Purchased on ebay 7549705140

Have hard copy of complete information on this motor and encoder, in [Electrical Devices] binder.

Servomotor:

Tamagawa TRE Servomotor - TS 1978N111E14.

50 VDC - 300W - 3000 RPM - Torque 10KGF-cm

Type TS 1978N _ 11E14

Mounting holes: Measures 82mm square on

Shaft; dia. 12mm, length 50mm, c/w keyway.

Serial No. A1393

Complete with Encoder

It appears that it might have 4 brushes.

The motor is short and wide. Does this indicate large torque and low RPM?

Sold as untested.

Considering for fuse ~ MDL Slow Blow Fuses (6.3 x 30mm) [300W / 50V = 6.0 AMP] 5 Amps, Model MDL-5A-2

Testing:

The power supply outputs 52.6VDC (rated at 48VDC)

I ran the motor at a voltage of 50.7V and no load. The current was 1.07A and the speed was? The resistance in the motor would be 50.7V / 1.07A = 47.4 Ω

A 2.2Ω 10W resistor was added in series with the motor. The voltage across the motor was 48.2V and across the resistor it was 2.2V. The current was 1.02A and the speed was? The power consumed by the resistor would be 2.2V * 1.02A = 2.24W. The resistor was warm.

At the motor's rated current of 7.5A the power consumed by the resistor would be 2.2V * 7.5A = 16.5W, which is too high for the 10W resistor. However the resistor could be replaced by a 1Ω 10W resistor and the voltage to the motor will be acceptable and the power consumption at the resistor will be OK.

Since it is not detrimental to run the motors at up to 5% over rated voltage, do not add any resistor to this motor.

Encoder:

From the specification sheet and the above Type: TS 1978N111E14

1 means 100C/T. What does C/T mean?

Yet the label says 500 C/T

What is the resolution of this encoder? Perhaps I can count the voltage changes per revolution of the motor's shaft.

The specification say: Power Source 5V. I assume that this will apply to the actual encoder.

E11 means:~ +5V +/- 5%, 200mA Max. & TTL compatible output.

Wires inside the Encoder Cover: 6 wires

Red

Black

Yellow

Blue

Orange ?

Brown ? (green)

Blue and brown go to a different location from the other 4 wires.

Wires Colors at the Connector: 6 wires

Red
Black
Heavier Gray/Green
Blue
Orange
Brown

I cannot determine which wire in the cover is the same wire at the connector because the wires are sealed in the encoder.

Decal on Encoder Cover:

	DC +5V	1
	CT GRD	2
	ACH OUT	4
	-ACH OUT
	BCH OUT	3
	-BCH OUT
	CCH OUT
	-CCH OUT
	OP GRD	5

Pinout: 6 wires, Round cable

Pin # on original connector: ⁽¹⁾	Signal:	Color of wires coming out of encoder:	Comments about preceding column	Color of DB-9 & controller wire connected to:	Pin # of DB-9 & controller wire connected to:⁽⁵⁾
1	+5VDC	Red		Red	1
2	Circuit GRD or Output GND	Black		Black	2
3 ⁽²⁾	Count Signal (Lag) Ch B	Brown ?		Green	5
4	Count Signal (Lead) Ch A	Blue		White	3
5 ⁽⁴⁾	?	Orange		Not connected
6 ⁽³⁾	SHIELD (Drain) ?	Grey ?	Thicker	Not connected

This was the pin sequence on the linear connector. The connector had only 6 pins.

This must be 'Lag' because the voltage varies as the motor shaft is turned by hand; same as does wire nbr 3

This wire might be the Circuit Ground' because it is thicker.

The voltage on this wire does not vary as the motor shaft is turned by hand.

These are the Renco wire color and pins, which have been incorporated into this CNC's encoder wiring.

For more information see pages in binder and Web page 1478.html

For color of wires used see; OTHER: CNC Work Station - Controller - Internal Wiring ~ Encoder

This motor/encoder passes the initial Gecko instruction test. ~ Rotating the motor/encoder causes the error light to go on and then 1 second later goes off. It works when the outputs Brown and Blue are pulled high (as per Tamagawa instructions) and when they are not pulled high.

However, the motor/encoder does not run properly.

Include then exclude the pull-ups.

Switch Ch B and Ch B.

Redo 1 with switched channels.

Pull-down the GRD

Additional Material:

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Last Revised: November 11, 2006