Mission SP1-L6H Expression Pedal Issue

[hxchaz]

I've had an issue with Mission SP1-L6H Expression Pedals, specifically in regard to volume blocks.  

When assigned as a volume pedal (in my case, it's connected with a single TS cable to EXP1 on Helix Rack), A 100% parameter value will drop to 0% randomly without the pedal being touched.  This, of course, results in a complete loss of output, which has made for some pretty awkward moments on stage.  

 

To troubleshoot, I used multiple brand new cables as well as a few different Helix Rack units.  After determining my first Mission pedal was the issue, I got a replacement from Sweetwater.  To my surprise, the new unit had the same issue.  I reached out to Mission, but they said there weren't any other reports of this happening.  At this point, it's too late to get a refund, so my Mission pedal is just collecting dust now.

 

I recently purchased a Dunlop DVP3 Volume (X) and I'm using it (Polarity reversed) with my Helix and I've had no issues whatsoever.

 

It's very possible that I just received two faulty Mission units, but I have a feeling it's just an inherent issue with the pedals.  I'm hoping someone could help shed some light on the issue.

[Joepeggio]

Maybe an L6 expert can chime in. In regards to the volume pot in the pedal is Vol down full resistance and vol up no resistance?

 

It seems if volume up is no resistance (full contact) in the pot, there must be a loose contact somewhere. Maybe mission got a bad set of 1/4 jacks or pots.

[DarthHollis]

Make sure when save the patch that you save it with the volume pedal toe down and that it says 100%.  The Helix actually remembers where it's supposed to be.  

 

For Whammy stuff, I always save at 0%, or heel down, so that I can turn it on with a switch and I don't have to start using it right away.

 

If it's just glitchy you may need to tighten the pedal or something so that it doesn't randomly move.