Speed Control Potentiometer

This is a 0 to 400 ohm or 0 to 500 ohm, 10-turn

 

 

potentiometer. WITH POWER OFF: remove the

 

 

red, white, and black leads from terminals S1, S2,

 

 

S3. With a digital multimeter, check the ohm

 

 

reading across the red to black leads. This ohm

 

 

reading should be a steady 400-ohm, or 500-ohm,

 

 

through the entire 10-turn rotation of the

 

 

potentiometer. Check for shorts or opens or

 

 

unsteady, ohms reading, if potentiometer is

 

 

defective, replace. If the potentiometer checks OK,

 

 

and there is no output at terminals A1 and A2,

 

 

replace the D. C. control board.

 

Reversing Switch

If there is D. C. voltage output from the motor

 

 

control board, but the conveyor drive motor is not

 

 

running, check the D.P.D.T. reversing switch.

 

Conveyor Drive Motor

Check the conveyor drive sprocket for tightness.

 

 

Disconnect the motor, check the red and black

 

 

motor leads for opens, shorts or grounds. Check

 

 

the brushes for excessive or abnormal wear.

 

 

Replace as needed. Reconnect motor. Test for

 

 

operation. If motor does not run, replace.

Conveyor will not

Voltage Supply

Check incoming voltage supply at line 1 to neutral.

run(S/N 4390 to

 

There should be a voltage reading of 120 VAC. If

Q190771000 Series)

 

no present, check breakers. 3 Amp Fuse. This

(S/N 4390-

 

conveyor fuse is located on the front panel.

Q147901200 Series)

 

Replace if defective.

 

Fuseholder

Check and/or Replace.

 

Fan Switch

See procedure for checking on Page 26.

 

Conveyor Switch

Same procedure as for fan switch.

NOTE:

(Dual Belt Ovens)

Dual belt ovens utilize 2 complete independent

 

 

conveyor drive systems. The trouble shooting

 

 

procedures are the same as single belt ovens,

 

 

except that the dual belt ovens use one each of the

 

 

following: one "A" D. C. control board and one "B"

 

 

D. C. control board.

 

Speed Adjustment

This is a 0 to 5 K ohm, 10 turn potentiometer With

 

Potentiometer

power off, remove the red, black and white pot

 

 

leads from the motor control board at terminals P1,

 

 

P2 and P3. With a digital multimeter, check the

 

 

ohm reading across the red lead (P3) to the black

 

 

lead (P1). This reading should be 5 K ohms ± 5%

 

 

as the pot is rotated from low to high. Place the

 

 

meter leads on the red lead (P3) and on the white

 

 

lead (P2) Rotating the pot. slowly, from low to high,

 

 

the meter reading should show an even transition

 

 

from O to 5 K ohms ± 5%. There should be

 

 

no dead or open spots through out the 10 turns of

 

 

the pot. Check all three leads to ground. There

 

 

should be no continuity to ground. If any of the

 

 

above checks fail, replace the pot.

Impinger I -–1000 Series Service Manual - International

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Lincoln Series 1200, Series 1000 service manual
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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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