SIP wire feed problems: a small suggestion

[Agroshield]

The trials and tribulations of the SIP wire feed are well-documented. But I've not yet seen mention of something that caught me out today, and which contributes to the weak feed roll package.

The reel of wire is held on by a knurled screw and a spring, used to adjust the resistance of the roll so it doesn't unwind and tangle. As the manual suggests, the wire should come off the reel from the bottom, hence it rotates clockwise.

This clockwise rotation can lead to self-tightening of the knurled screw, increasing the resistance of the roll and causing wire-feed problems. This manifests itself at the tip as burn back, leading to the wire welding itself to the tip if you are not careful.

So. what I'm saying, is check not only your feed-rolls but also the reel if you are experiencing problems. I am going to try a couple of things to overcome this: install a thrust bearing between spring and reel or try a softer spring for the smaller reel.

 

[malcolm]

Normally, or at least on other welders, there is a plastic washer with a notch on it that locates in a flat in the spindle to stop it from rotating. It fits between the reel and the tensioning spring.

Doesn't the SIP have one? If not must be easy to make something with an angle grinder and a big washer with a spot of weld on it.

 

[andrewg1323]

i've found mine works a million times better if i take that off altogether and let the wire free-wheel

 

[weldequip]

Trouble is then you get wire over-run when you stop welding & end up with a bird's nest of tangled wire!
weldequip

 

[originalracingsnake]

I fitted a washer that fits over the knurled tensioner knob and stops the spring from pressing on the knob itelf. A blob of copper grease on it, and voila, no more binding of the spring on the tension knob.

Top tip, thanks for that.