powerultra 205p pedal

sad, but true, been in n out of hospital pretty much since I bought my powerultra 205p. Anyway, question is, when in pedal mode, amps go from 0 - max based on pedal being pressed all the way, no matter what the knob is set at on the panel? is that the case? I know in panel mode I can set max amps. I thought if I set knob lets say 1/2 way, the pedal would only give 1/2 amps, even if pressed all the way. Do I need to make some kind of adjustable stop for the pedal to limit amps? Thanks for any info, like I said, havent been able to really fully check out the machine since I bought it.

On that model machine, it does not support limiting amps with the foot pedal, it merely substitutes for the amp control on the panel.

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Originally Posted by performance

On that model machine, it does not support limiting amps with the foot pedal, it merely substitutes for the amp control on the panel.

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Darn, kinda what I thought. Will have to fab an adjustable stop for the pedal, and mark approx amps. Oh well, thanks for the quick reply.

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Originally Posted by performance

On that model machine, it does not support limiting amps with the foot pedal, it merely substitutes for the amp control on the panel.

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Other than making an adjustable stop for the pedal, are there any other pedals available that will serve the same purpose?

No. Though it is possible that adding a pot in line with the foot pedal could do it.

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Originally Posted by performance

No. Though it is possible that adding a pot in line with the foot pedal could do it.

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Anybody have any specs/schematics, etc, anybody done this already?

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Originally Posted by ljdm1956

Anybody have any specs/schematics, etc, anybody done this already?

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Need to know value of pot, and whether linear or audio taper, etc. Any ideas out there?

Everlast had a pedal with that kind of limit pot for their early machines. There should be some schematics and values to get you started on this forum if you search back on pedals. For starters measure the existing pot in your pedal and use the same for your second pot. As it is being used as a voltage divider, you probably want linear, but that is personal preference. Audio might give you more granularity in the area you weld in. There are a lot of pedal mods listed here, everything from simple mechanical fixes, to arduino based controls to add features.

Here is a basic idea of what will get you going. Original on the left and the second pot added on the right.

Attachment 13487

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Originally Posted by Rambozo

Everlast had a pedal with that kind of limit pot for their early machines. There should be some schematics and values to get you started on this forum if you search back on pedals. For starters measure the existing pot in your pedal and use the same for your second pot. As it is being used as a voltage divider, you probably want linear, but that is personal preference. Audio might give you more granularity in the area you weld in. There are a lot of pedal mods listed here, everything from simple mechanical fixes, to arduino based controls to add features.

Here is a basic idea of what will get you going. Original on the left and the second pot added on the right.

Attachment 13487

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Thanks for the info! Will do a search for more details. Too bad they dont sell the pedal I need.

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Originally Posted by ljdm1956

Thanks for the info! Will do a search for more details. Too bad they dont sell the pedal I need.

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You can call Everlast. They might have some NOS in the warehouse. You might just have to change the plug if it's an older type. Probably easier to just add a pot to the pedal you have now, though.

Since your machine is dual voltage, the real easy way to cut max power about in half is to just run it on 120 volt when you do light work. No mods required.