Speed Adjustment

This is a 0 to 50k ohm, 10 turn potentiometer.

 

 

Potentiometer

WITH POWER OFF: remove the 3-pin

 

 

 

potentiometer cable plug from the motor control

 

 

 

board. With a digital multimeter, check the ohm

 

 

 

reading across the red lead to the black lead. This

 

 

 

reading should be 50k ohms ±5% as the

 

 

 

potentiometer is rotated through its 10-turn rotation.

 

 

 

Place the meter leads on the red lead and white

 

 

 

lead. Rotating the potentiometer slowly, from low to

 

 

 

high, the meter should show an even transition

 

 

 

from 0 to 50k ohms ±5% through the 10-turn

 

 

 

rotation of the potentiometer. There should be no

 

 

 

dead or open spots through the 10 turns of the

 

 

 

potentiometer. Check all three leads to ground.

 

 

 

There should be no continuity to ground. If any of

 

 

 

the above checks fail, replace the potentiometer.

 

 

Conveyor Motor

NOTE: if the conveyor drive motor becomes

 

 

(Stepper)Control

jammed or begins to run at an uncontrolled speed,

 

 

 

the conveyor motor will stop running. To reset, turn

 

 

 

off the conveyor switch, wait 10 seconds, turn the

 

 

 

conveyor switch on. If the motor does not run after

 

 

 

attempting re-set, check for 2 to 29 VAC across the

 

 

 

motor terminal 1 to 2 and 3 to 5 on the conveyor

 

 

 

motor control. If voltage is not present at both sets

 

 

 

of terminals, replace control.

 

 

Conveyor Drive

Check the drive sprocket on motor output shaft to

 

 

(Stepper)Motor

insure that is tight. Check motor windings;

 

 

 

measurements should be approximately 2 ohms.

 

 

 

Terminal 1-5, 2-6, 3-7, 4-8. WITH POWER OFF:

 

 

 

Turn the motor shaft to check for jammed gear box.

 

 

 

If motor shaft will not turn, replace conveyor

 

Time/Temp Display

 

drive(stepper) motor.

 

12.6 VAC Power Supply

Measure the transformer primary for a nominal 120

 

inoperative

 

VAC input. Measure the secondary voltage output

 

 

 

which will be 12.5 to 15 VAC normally. Recheck

 

 

 

secondary output at rear of Time/Temp Display.

 

 

 

Terminals 1 to 3 should read 12.5 to 15 VAC.

 

 

 

Terminals 1 to 2 and 2 to 3 should be 1/2 of the

 

 

 

reading across 1 to 3. If you do not get the above

 

 

 

secondary readings, replace the transformer. If 120

 

 

 

VAC primary voltage is not available, refer to the

 

 

 

schematic and trace circuit for incoming power

 

 

 

failure. There is a 4-amp fuse in each red

 

 

 

secondary lead. These may be jumpered (for test

 

 

 

only) to determine if they are defective or

 

NOTE

 

intermittent.

 

(Dual Belt Ovens)

Dual belt ovens utilize a double pole double throw

 

 

 

switch, which allows either of the optical encoders

 

 

 

to be read from a single Time/Temp. Display.

 

 

 

Check the switch and replace as needed.

 

Temp Display out or

NOTE: Time/Temp displays

Place your pyrometer thermocouple into the center

 

inaccurate

use two types of temperature

between fingers T2 and T3 in the oven. Disconnect

 

 

sensor, Thermistor Probe - 2

the yellow tipped thermistor leads from the

 

 

yellow wires, Thermocouple

time/temp. terminals 9 and 10. Measure the

 

 

Probe - 1 red wire and 1

resistance of the thermistor probe.

 

 

white wire

 

 

 

Thermistor Probe

See chart on page 72 for proper resistance

 

 

 

readings. Inspect the thermistor bulb for its proper

 

 

 

location in its spring holder. Check for shorts in

 

 

 

leads where they enter the sensor bulb. Also check

 

 

 

each thermistor lead for short to ground.

 

36

 

Impinger I -–1000 Series Service Manual - International

Page 35 Page 37
Page 36
Image 36
Lincoln Series 1000, Series 1200 service manual
Page 35 Page 37

Series 1000, Series 1200 specifications

The Lincoln Series 1200 and Series 1000 are two distinguished models in the range of Lincoln Electric welding machines, epitomizing quality, versatility, and advanced technology for both industrial and residential welding applications.

The Lincoln Series 1200 is renowned for its robust build and high-performance capabilities. One of its main features is the ability to perform both MIG (Metal Inert Gas) and stick welding processes, making it a versatile option for various welding requirements. It incorporates an intuitive control panel that allows for easy settings adjustments, ensuring operators can swiftly adapt to different materials and thicknesses. The Series 1200 is equipped with a powerful drive system to provide smooth wire feeding, minimizing downtime due to jams or misfeeds. Additionally, its high-duty cycle support allows continuous operation, making it an ideal choice for professional welders and fabrication shops.

In terms of technology, the Series 1200 employs advanced inverter technology that enhances energy efficiency while reducing the machine’s overall weight. This results in portability without compromising power, making it a practical choice for on-site tasks. Moreover, the machine features an automatic voltage adjustment that optimizes performance based on the input voltage, ensuring reliable operation even under fluctuating power conditions.

On the other hand, the Lincoln Series 1000 is specifically designed for entry-level users and small projects. It shines with its user-friendly interface, which simplifies the welding process for beginners. This model typically includes pre-set parameters and an easy-to-read display, enabling novice operators to achieve excellent welds with minimal experience. Despite its entry-level focus, the Series 1000 does not skimp on performance, offering dependable results across various materials.

Both the Series 1200 and Series 1000 incorporate safety features, including thermal overload protection, ensuring that users can operate the machines with peace of mind. Their durable construction allows for prolonged use in tough work environments without sacrificing reliability.

In conclusion, the Lincoln Series 1200 and Series 1000 cater to a wide range of welding needs, from professional applications to home projects. Their respective features and technologies present options that can fit various skill levels while delivering exceptional welding performance and longevity. Whether you are a seasoned professional or a hobbyist, Lincoln Electric provides reliable solutions to meet your welding requirements.
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