Lincoln wire-matic 255 feed/speed problem

Ignoramus22591

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Jan 13, 2014, 9:02:19 AM1/13/14

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We have a Lincoln wire-matic 255 mig welder. Lately it has developed a
problem, as follows: when the operator presses a trigger, it starts
feeding the wire way too slowly, for about a second, then it instantly
increases the speed to the proper speed and stays at that speed.

This happens every time and is very consistent. The proper speed
should be attained right away instead of a delay.

I tested the motor alone, it runs fine.

Any idea what may be wrong with it. I have my own ideas, but I do not
want to share them so as not to pre-judge anyone.

thanks

Gunner Asch

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Jan 13, 2014, 10:21:26 AM1/13/14

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Is the wire feeder slipping? If it is..you have a worn set of rollers
set too loose or a rubber link roller is getting hard or worn.

Generally the motors are connected to the actual feeder mechanism..and
are not direct drive.

Gunner

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Ignoramus22591

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Jan 13, 2014, 10:34:06 AM1/13/14

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On 2014-01-13, Gunner Asch <gunne...@gmail.com> wrote:
> On Mon, 13 Jan 2014 08:02:19 -0600, Ignoramus22591
><ignoram...@NOSPAM.22591.invalid> wrote:
>
>>We have a Lincoln wire-matic 255 mig welder. Lately it has developed a
>>problem, as follows: when the operator presses a trigger, it starts
>>feeding the wire way too slowly, for about a second, then it instantly
>>increases the speed to the proper speed and stays at that speed.
>>
>>This happens every time and is very consistent. The proper speed
>>should be attained right away instead of a delay.
>>
>>I tested the motor alone, it runs fine.
>>
>>Any idea what may be wrong with it. I have my own ideas, but I do not
>>want to share them so as not to pre-judge anyone.
>>
>>thanks
>
> Is the wire feeder slipping? If it is..you have a worn set of rollers
> set too loose or a rubber link roller is getting hard or worn.

It is not slipping. It was a board problem.

I had a junk wire-matic 255 (similar model but not identical to this
250).

I took a board out of it, which looked similar enough, replaced the
board, and now our welder runs great again.

i

Gunner Asch

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Jan 13, 2014, 10:34:13 AM1/13/14

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On Mon, 13 Jan 2014 07:21:26 -0800, Gunner Asch <gunne...@gmail.com>
wrote:

>On Mon, 13 Jan 2014 08:02:19 -0600, Ignoramus22591
><ignoram...@NOSPAM.22591.invalid> wrote:
>
>>We have a Lincoln wire-matic 255 mig welder. Lately it has developed a
>>problem, as follows: when the operator presses a trigger, it starts
>>feeding the wire way too slowly, for about a second, then it instantly
>>increases the speed to the proper speed and stays at that speed.
>>
>>This happens every time and is very consistent. The proper speed
>>should be attained right away instead of a delay.
>>
>>I tested the motor alone, it runs fine.
>>
>>Any idea what may be wrong with it. I have my own ideas, but I do not
>>want to share them so as not to pre-judge anyone.
>>
>>thanks
>
>Is the wire feeder slipping? If it is..you have a worn set of rollers
>set too loose or a rubber link roller is getting hard or worn.
>
>Generally the motors are connected to the actual feeder mechanism..and
>are not direct drive.
>
>Gunner

Oh...your liner can be dirty as hell also and it can cause this.

Pull the liner and shoot WD down the liner and see how much spooge
comes out the far end

SteveB

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Jan 15, 2014, 11:09:30 PM1/15/14

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Have you tried an .045" liner on .035 wire? I used to never use
anything but .045, and it takes a long time before it gunks up. Try
one. What have you got to lose? At least you'd have a new liner in
there, even if that was not your problem.

Steve

Ignoramus29535

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Jan 16, 2014, 9:24:25 AM1/16/14

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Steve, it did the same thing even with the wire completely removed. It
was not a liner problem. It was a board problem -- I swapped a board
from a junk Linxoln 255 (similar but not identical) and it works great
now.

i

Dwb1

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Dec 25, 2017, 7:18:04 PM12/25/17

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replying to Ignoramus29535, Dwb1 wrote:
Could someone tell me where i can acquire this board as i have the same
problem with a lincoln wire matic 255

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for full context, visit https://www.polytechforum.com/welding/lincoln-wire-matic-255-feed-speed-problem-52609-.htm

Ignoramus19532

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Dec 30, 2017, 6:48:24 PM12/30/17

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On 2017-12-26, Dwb1 <0f8503901d844703ee...@example.com> wrote:
> replying to Ignoramus29535, Dwb1 wrote:
> Could someone tell me where i can acquire this board as i have the same
> problem with a lincoln wire matic 255
>

Hi. Some smart people told me that tere is nothing wrong with the
board, but it has a very odd way of changing board settings, and they
got messed up.

Haroldharley1962

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Oct 3, 2022, 5:03:43 PM10/3/22

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Turn the welder off hold the trigger on turn the wire speed clear full all the way then to power up it will beep three times that will be fast start instead of slow start

--
For full context, visit https://www.polytechforum.com/welding/lincoln-wire-matic-255-feed-speed-problem-52609-.htm

BigE

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Dec 6, 2022, 1:36:15 AM12/6/22

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Harold you are awesome and right . I just went through the wire start speed sequence and it changed the wire start speed just as you described .

--
For full context, visit https://www.polytechforum.com/welding/lincoln-wire-matic-255-feed-speed-problem-52609-.htm