INITIAL BURST

[J.HENRY]

HI THER PEOPLE , IN NEED OF ASSISTANCE .
I AM USING A MILLER SYNCROWAVE 300 TIG MACHINE , I HAVE PLAYED AROUND WITH SETTINGS AND CHANGED FOOT PEDALS OVER BUT I CANT SEEM TO STOP THE INITIAL BURST OF ARC .
I AM WEILDING 1MM THICK ALLY TOGETHER AND THE INITIAL BURST DESTROYS THE ALLY BEFORE I GET CHANCE TO START WEILD. IS THERE ANYONE FAMILIER WITH THE MILLER MACHINES THAT CAN HELP .
MUCH APPRECIATED

 

[chrismac]

Hello and welcome,
If you can get a picture on of the panel and settings, it might be of help to get you sorted.

 

[Barking Mat]

HELLO AND WELCOME !

 

[J.HENRY]

 

[J.HENRY]

APOLOGIES , IM NOT SO TECH SAVY . HOPE THIS IS OK

 

[hotponyshoes]

The digital display on the front shows the actual welding current.
Get someone else to watch this or set up your phone to record a video and see what is happening when you start the weld.

 

[addjunkie]

Are the leads the right way round?.

 

[Barking Mat]

Are the leads the right way round?.

Doing AC alu ?

 

[BrokenBiker]

Doing AC alu ?

could be an issue if the AC balance assumes torch is negative but its actually positive? i dont know whether that would give the issue at hand but was told to never swap tig leads for this reason on AC

 

[addjunkie]

Another observation from the text…foot pedal …burst destroys the metal. Im thinking perhaps full pedal is full amps, when for 1 mm ali maybe 40 amps is more appropriate.

If tig leads are reversed not uncommon for someone with no instructions, or doesn't read them coz he knows best in the example I saw, the electrode get very hot, hot enough to blow throw 1 mm perhaps.

 

[Barking Mat]

Another observation from the text…foot pedal …burst destroys the metal. Im thinking perhaps full pedal is full amps, when for 1 mm ali maybe 40 amps is more appropriate.

Aren't there limiting ampage knobs on foot pedals ? Or does it need dialing in on the machine ?

 

[BrokenBiker]

APOLOGIES , IM NOT SO TECH SAVY . HOPE THIS IS OK

turn it on, take the ground clamp off and then put your foot on the pedal all the way down and take a photo of the display. this will show the amps you are welding at. as above, you only want about 40 amps max, very possibly less as it get hot

 

[BrokenBiker]

Aren't there limiting ampage knobs on foot pedals ? Or does it need dialing in on the machine ?

with a miller i would imagine its done on the machine...the cheaper machines like mine have a knob on the pedal that needs adjusting with the pedal pressed down fully.

 

[hotponyshoes]

On that machine the pedal max is controlled by whatever is set on the machine.
Nice way of doing it as you can still use the full pedal range.
There are also a couple of options enabled via the sd card slot that allow for progressive pedal control which might be causing the issue if the op happens to have an sd card inserted? (Presuming it's the same as the dynasty ones I've got?)

Looking at the photo I'd say the torch is wired up correctly?
Even if the torch was connected wrong it wouldn't explain why there is only a burst of power at the start.

There are a couple of options in the menu settings which might be causing it, a video or explanation of what exactly is happening with the power during the weld would help work it out..

 

[hotponyshoes]

He does mention trying a couple of pedals,
There are 14 pins on the socket, 5 wires for the pedal.

2 power outputs in the socket, 15v and 10v.
I think it's the 10v that feeds back from the pedal so if it's wired upto a 15v pin that might provide too much power?

Should still limit to whatever is set on the front panel though?

There is slope adjust. Its possible the initial start may be set way higher than the run current.
But slope should be disabled with a pedal connected. Maybe not if the pedal is not wired correctly though...

 

[Turbo]

Can't help with the welder but please don't type in CAPITAL LETTERS. It is the equivalent to shouting at somebody and is quite rude.

 

[fizzy]

Try without a pedal and adjust the slope up and down - I assume it has them?

 

[hotponyshoes]

Try without a pedal and adjust the slope up and down - I assume it has them?

It has about 30 settings for slope operation.

If the op is not tech savvy it's probably simpler to connect the pedal and override all of them

 

[chrismac]

There is slope adjust. Its possible the initial start may be set way higher than the run current.
But slope should be disabled with a pedal connected. Maybe not if the pedal is not wired correctly though...

I have certainly seen this before where the start up amps is higher that that amps actually needed. confusing for the less familiar users,

I did not realise it was the new style of syncowave machine, very little info from a photo, I guessed wrongly it was the older machine with all the adjustment knobs visible and easily identifiable, like this https://eu.ironplanet.com/for-sale/Welding-Machines-and-Equipment-MILLER-SYNCROWAVE-300-ARC/TIG-WELDER-Virginia/4917259?iprefoh=www.ironplanet.com