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Post subject: EXP-1 calibration problem
Posted: Wed Apr 11, 2012 3:06 pm
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I received my EXP-1 from Sweetwater yesterday and noticed very soon that the response of the pedal was much quicker than it should be, it reaches max volume and effect of the selected box just before half way of the travel from heel to toe. I tried calibrating with and without the 4-button footswitch attached and with the pedal at both extremes during calibration with no change.

I'm an electronic tech and since there are no stickers that say I'm voiding the warranty I couldn't resist opening it up to see if there was something that I could fix easily without having to ship it back. It uses an IR LED/photocell that reflects off a tapered white strip that is attached to the pedal, as you move the pedal the taper widens reflecting more IR thus increasing volume/effect. The problem is that the angle of the taper is too wide.

The good news: I was able to fix mine by covering the edges of the white strip with electrical tape to make the angle slightly more acute, plugged it in, calibrated it and it worked perfectly on the second attempt. The first time I overdid it and it wouldn't reach full volume/effect.

I'm interested if anyone else has noticed this.


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Post subject: Re: EXP-1 calibration problem
Posted: Fri Apr 13, 2012 9:39 am
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Hey lnowlin,

Are you sure you followed the calibration steps properly? Press and hold Utility while powering up. Make sure the Utility LED lights up for 1 second.
Then move the pedal between min and max a few times.

Also do you have firmware version 1.9 installed on the amp?

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Post subject: Re: EXP-1 calibration problem
Posted: Fri Apr 13, 2012 2:40 pm
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Hey Loren,

Thanks for the reply.

I do have v 1.9 installed, verified in the utilities.

I followed the cal instructions in the Fuse manual, it doesn't mention moving the pedal during calibration, so I removed my fix and tried the cal moving the pedal between min and max as you suggested, still doesn't work correctly on volume or effect. This is confirmed graphically on the LCD and in Fuse when I put it into expression mode and watch the frequency knob on the pedal wah, it reaches max just short of half way between heel and toe. I can't confirm the volume graphically but it's easy enough to tell that max volume is reached just short of half travel. I put some more electrical tape on the strip and calibrated and now it works as expected.

I've attached photos for comparison, the fix doesn't look very good but it works much better than it did out of the box.

Image
Image


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Post subject: Re: EXP-1 calibration problem
Posted: Fri Apr 13, 2012 8:38 pm
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Mine also reaches max at just slightly past halfway. i followed the calibration steps from the manual. There is no mention of moving the pedal to min or Max during calibration.

Also how can I switch to volume mode from expression mode without maxing out the expression parameter?


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Post subject: Re: EXP-1 calibration problem
Posted: Sat Apr 14, 2012 5:34 am
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OK the manual says hold down the Util button while turning on and when the light goes out the pedal is calibrated. You said:

Are you sure you followed the calibration steps properly? Press and hold Utility while powering up. Make sure the Utility LED lights up for 1 second.
Then move the pedal between min and max a few times.

Here from the manual
To calibrate the EXP-1:
1. Plug the EXP-1 pedal into the "4 BUTTON" FOOTSWITCH
jack on the back of your Mustang amplifier using the
included cable.
2. Turn the amplifier OFF.
3. Press and hold the UTIL button on the amplifier, then turn
the amplifier ON. Continue holding the UTIL button down
until it is no longer illuminated.
4. The EXP-1 expression pedal has been calibrated!



So you move the pedal AFTER the light has gone out? Do you still hold the button down while doing so? Or let go move the pedal and then press the exit button?


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Post subject: Re: EXP-1 calibration problem
Posted: Sat Apr 14, 2012 7:42 am
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Quote:
GodinSession: Also how can I switch to volume mode from expression mode without maxing out the expression parameter?

Page 12 of the Fuse manual explains the options, see H and I. H selects whether or not to turn off the expression parameter and I selects whether to reset to preset value.


Quote:
Stinger22: So you move the pedal AFTER the light has gone out? Do you still hold the button down while doing so? Or let go move the pedal and then press the exit button?

It make sense that you would move the pedal through the travel to calibrate it but I don't think that is how it's setup in the firmware. If it were the util light would stay on until after it sees both ends of travel of the pedal plus the manual doesn't mention it.

All I know for certain is that out of the box mine maxes out just short of half travel and with the fix I reach max volume/effect just short of the toe stop and min just short of the heel stop.


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Post subject: Re: EXP-1 calibration problem
Posted: Sat Apr 14, 2012 6:14 pm
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Well I tried to calibrate by turning on while holding the util button down, waiting for it to go out and then still holding it down, moving the pedal through it's range.

And

Waiting for the light to go out then releasing the util button and moving it through it's travel.

Either way the pedal maxes out about 70% down. Heel seems to be close but what the gain on the overdrive or the freq on the wah the knob and tone maxes out before it toes out.


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Post subject: Re: EXP-1 calibration problem
Posted: Mon Apr 16, 2012 10:00 am
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I've spent some time with mine now:

The volume works great, I don't have the 1/2 pedal max problem with mine.

As for the expression side:

When you switch to it, you lose the volume pedal and are at max volume, (Guess I should have known this)

As a wah-wah pedal it works good, if that's all you want.

I haven't found any real use for any of the other settings. I tried most of them briefly.
I can use tap to change rates, not sure where I would use it to change tone...

My summary is;

What I was wanting was a good volume pedal, any thing added to that would be great, but not a necessity or a deal breaker.

I'm happy with the exp-1, I got a good volume pedal and somethings I can just play around with it. In practicality, its a reasonably priced volume pedal.

L.A.


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Post subject: Re: EXP-1 calibration problem
Posted: Wed Apr 18, 2012 6:37 am
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No response from Fender?


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Post subject: Re: EXP-1 calibration problem
Posted: Wed Apr 18, 2012 1:10 pm
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I called Fender this afternoon and discussed our calibration issue with Alan Willey. He understands the issue we are having and is going to test it in-house and see if he can reproduce it. He said he will update this thread after he does so.


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Post subject: Re: EXP-1 calibration problem
Posted: Wed Apr 18, 2012 5:23 pm
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Hey GodinSession,

Thanks for taking the time to call Fender about this problem. I'll be checking back often to see the reply from Alan.

I think it would be fairly easy for Fender to make a fix with the correct angle of the white part with an attachment that clips or tapes onto the existing white arrow. Then they could just send them out to people who have the problem and request one.


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Post subject: Re: EXP-1 calibration problem
Posted: Fri Apr 20, 2012 7:42 am
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Hmmm no responses yet??


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Post subject: Re: EXP-1 calibration problem
Posted: Fri Apr 20, 2012 8:35 am
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Hey Guys,

Were still doing some testing here. We'll let you know as soon as we have something. Thanks so much for your patience.

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Post subject: Re: EXP-1 calibration problem
Posted: Sat Apr 21, 2012 11:06 am
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Hey Loren,

Maybe Fender received a misconfigured batch of the pieces with the white arrow on it from a vendor. On mine it is obvious that the white part reaches maximum width well before the pedal reaches end of travel which is definitely the cause of the problem with mine (see earlier photos).

If you find that there are differences in these pieces just mail me one that is made correctly and I'll replace it myself free of charge. Meanwhile, the electrical tape mask still works.

Thanks,
Larry


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Post subject: Re: EXP-1 calibration problem
Posted: Mon Apr 23, 2012 2:45 pm
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Hello everybody,
Just want to say I'm having the same problem with my pedal. The parameters you are influencing are reaching maximum before the pedal does.

I want to add a new problem too. When you switch between volume and expression, you always have instant maximum of the parameter you're influencing.

The manual suggests that you can use capture or live, but it doesn't seem to be much of a difference. Maybe I'm doing something wrong or just don't understand how to use this option.?

Thanks in advance for any suggestions.
kind regards,
Chris


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