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philipjoyce

Expression pedal issue goes 0%-100%-0%

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hi guys, i just got a pair of morley M2 passive expression pedals that i plan to use with my Helix. 
Problem is when i try to assign one to the volume pedal block for example and i use the learn controller function. the pedal goes from 0 to 100 and back to 0. 
i saw on a previous post someone rewired their volume pedal to work, but the Morley doesnt have a traditional pot but rather a slider inside, now it still has 3 poles, I've tried jumping the ring and sleeve together but that didn't work.
i've tried it with a standard mono patch cable and also a stereo cable, all produce the same result. 
0-100-0 . 

Anyone any ideas what i can do to get them working ? 
 

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sorted it. just had to disconnect one lug of the slider and connect it to the sleeve connection. so its all good. 

2 minute job. 

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Great! Expression pedals are all over the map, and some simply aren't compatible with Helix at all. Glad you got it sussed out.  :)

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sorted it. just had to disconnect one lug of the slider and connect it to the sleeve connection. so its all good. 

 

2 minute job. 

 

Thanks for this! A picture would be great if you can manage.

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Great! Expression pedals are all over the map, and some simply aren't compatible with Helix at all. Glad you got it sussed out.  :)

 Thanks, I've definitely voided the warranty on the pedals but id rather they work with Helix then worry about the warranty 

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heres a pic of the inside of the Morley M2. I've circled on the slider where you need to remove the connection on lug 3 and connect it to lug 1 which i marked with an arrow...

post-2038152-0-39885000-1461019228_thumb.jpg

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Just wanna share this, its the Helix Tricks compilation from the massive TGP thread and somewhere in it, there are diagrams on how to modify different expression pedals to work with Helix. Credit goes to Flyingscool from TGP.

 

https://www.dropbox.com/s/1ixrfz0lb8oiw6t/Helix%20Tricks%20160319.docx?dl=0

Thats a great resource, thanks.

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I notice the same behavior, except that it goes to 58% and then back to zero. It never reaches 100%. Anyone else has noticed it?

 

I'm trying to get some reassurance before I do the mod myself as well. :-)

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heres a pic of the inside of the Morley M2. I've circled on the slider where you need to remove the connection on lug 3 and connect it to lug 1 which i marked with an arrow...

 

After you did the mod, did you just run a regular cable or a trs cable? Also one other question, do you use this for wah? I really want one for wah. I have the all in one unit and I don't like the sweep of the built-in pedal. It feels food foe volume and whammy but not wah. If this works, I'm ordering one like in 10 minutes!! LOL! Thanks for the help in advance!!

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this needs to be pinned I have to repost it every month or so......

Here is something I posted before for anyone who wants to mod your EXP of what ever brand.


Posted 18 January 2016 - 03:22 AM


From:


 Wiring.

Most potentiometers have three connectors; Clockwise, Counter-clockwise, and Wiper. Amazingly, there are multiple different ways these can be wired, all achieving largely the same result, which means yet more variations for expression pedals. The most common expression pedal wiring is to connect the pot to a 1/4″ stereo (TRS) instrument jack as follows:

CW —— Sleeve

Wiper — Tip

CCW —– Ring

An alternative is with the tip and the ring reversed as follows:

CW —— Sleeve

Wiper — Ring

CCW —– Tip

Yet a third way is as follows:

CW —— Sleeve

Wiper — Tip

CCW —– Tip


In this last one, the wiper and CCW are bonded together and connected to the tip and the ring is unused. This requires the use of a mono (TS) cable such as a regular guitar cable, in place of the stereo (TRS) cable used in the other two. These three are the most common that we see in expression pedals, but we keep finding more. Sometimes a dual gang potentiometer is wired in parallel to create a single pot with half the resistance. For example you may see a dual 20K Ohm potentiometer bridged into a single 10K. In this case the pedal will function the same as if it were a native 10K Ohm single pot.

.....................................


OK so now we know we can do this:


The third way is the Line 6 way. (after some google searches I found this out)


This also alleviated the backwards operation problem and the 0 - 100 - 0 problem...


which means after the conversion you don't need to use TRS cables anymore you can use TS cables. Also now with either the 12k ohm pot in the one and the 10k ohm pot in the other I get full 0% to 100% on the Helix control.

here is what I did to make mine compatible so there would be no need for re configuring. the Potenteiometer on this 1 is 10k

gcmission1.jpg

Here is before

gcmission2.jpg

here is after... so just moving 1 wire (the green/ring) and put it together with the (red/Tip) and the (black/sleeve) stays the same.

also I jumped out the back on the side pot that is for changing the "throw" of it to disable it and not doing it made it have issues when you adjusted it it would not go back to full throw. (If that makes any scents to you)

gcmission.jpg

My other one

missionEPEV1.jpg

here is after... so just moving 1 wire (the green/ring) and put it together with the (red/Tip) and the (black/sleeve) stays the same.

missionEPEV.jpg


this model had a duel 24k pot and I soldered each connection 1,2 and 3 to 1,2 and 3 (you see it better in the picture above) making it a single 12k pot

missionEPEV2.jpg


This can be done with a soldering iron with no extra solder. just heat up the green wire pull it off and put it on with the red and heat it up to connect it.


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After you did the mod, did you just run a regular cable or a trs cable? Also one other question, do you use this for wah? I really want one for wah. I have the all in one unit and I don't like the sweep of the built-in pedal. It feels food foe volume and whammy but not wah. If this works, I'm ordering one like in 10 minutes!! LOL! Thanks for the help in advance!!

 

i had made up TRS patch cables before i got the Morleys so i used those i believe that a regular mono TS cable would work fine

 

i like the travel on the morley pedals, i have a bad horsie and and little alligator so was familiar with the feel and travel

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