Installed a new data wheel encoder

Yeah, scooby is right.

I'm so sorry - didn't know about this. Never owned the older mpc1000.

Got a PM from a guy with the same problems.
(CW and CCW reversed - and skips two increments per encoder tic. if installed on older mpc)

I downloaded of the service manual for the original mpc, and the specs for the encoder does not match. Does anyone know when specs changed? What model no.?

I'll update the first post.

Have you tried searching the farnell site for the right encoder? Is it not manufactured anymore? There HAS to be a way of finding a part that fits the specs. I will look into it.

And just a note: If I voided my warranty, or if this mod is difficult or not, is beside the point. I still hope this info is useful for someone. Saves you the hassle of finding the right part.

And... Please be aware of voiding your warranty - Modify your equpment at your own risk.

U.

DOUBLE EDIT: The plastic encoder is:

Mitsumi SIM-026MT

http://mpc-forums.com/viewtopic.php?f=21&t=113912

All useful information found in there and thanks to oLsen.

Ok, I'm not an electronics head by any means but having read the Mitsumi data sheet, and having compared it to the Farnell part I ordered that didn't work to replace my plastic encoder I can see the crucial specs that seem to differ are these:

Mitsumi...

Detents: 24
Pulses: 6 per rotation 360°
Output: 2 (I think this is the same as Channels)

ALPS...

Detents: 24
Pulses: 24 per rotation 360° (this would explain why this encoder jumps)
Output: 2

I've checked at Farnell and Mouser and the only thing I can find that seems to fit the specs of the original Mitsumi product is this:

http://uk.mouser.com/ProductDetail/CTS-Electronic-Components/291C6022F624AB/?qs=sGAEpiMZZMvy8cVzszrmR9QuVxywjd27aN8qn8jEvA0%3d

But as you can see the pins aren't correct. The hunt continues!

wait, regarding the wrong rotary encoder
does this have anything to do with the option 1/2 encoder style paramter in jjos?
i think he coded that in there in case people had this issue.
correct if wrong.

Nym wrote:wait, regarding the wrong rotary encoder
does this have anything to do with the option 1/2 encoder style paramter in jjos?
i think he coded that in there in case people had this issue.
correct if wrong.

I was just wondering the same thing. I bought a used MPC 1000, loaded it with JJOS and the data wheel jumped in exactly the same way the OP described. I found the 1/2 encoder parameter in JJOS settings, changed it, and it worked like a charm.

Nym wrote:wait, regarding the wrong rotary encoder
does this have anything to do with the option 1/2 encoder style paramter in jjos?
i think he coded that in there in case people had this issue.
correct if wrong.

Thanks for this Nym, in anticipation I actually jumped straight up and had a go. Unfortunately I can confirm that for me at least having upgraded from the plastic Mitsumi encoder, this has still not worked.

@ MeSo, can I ask if your 1000 has a metal-bodied rotary encoder in it? Don't take her apart if you don't have to, but if you know it will help us clarify which work arounds will be successful for the future.

My fear is that a lot of the problems lie with this plastic bodied encoder and its PCB, which is why Akai have clearly upgraded the part later. Although, it could also be down to obsolete components as I've scoured the internet and not been able to find anything else with correct specifications.

scoobylol wrote:

Nym wrote:wait, regarding the wrong rotary encoder
does this have anything to do with the option 1/2 encoder style paramter in jjos?
i think he coded that in there in case people had this issue.
correct if wrong.

Thanks for this Nym, in anticipation I actually jumped straight up and had a go. Unfortunately I can confirm that for me at least having upgraded from the plastic Mitsumi encoder, this has still not worked.

@ MeSo, can I ask if your 1000 has a metal-bodied rotary encoder in it? Don't take her apart if you don't have to, but if you know it will help us clarify which work arounds will be successful for the future.

My fear is that a lot of the problems lie with this plastic bodied encoder and its PCB, which is why Akai have clearly upgraded the part later. Although, it could also be down to obsolete components as I've scoured the internet and not been able to find anything else with correct specifications.

I dont know Scooby. However, I've taken mine apart many times, so I'll take a quick look this weekend.

just an idea..

this one
alps EC12E2424407
seems exactly the same as the one as the original post - except its got 2 extra pins and has an additional switch action (i think - those datasheets are pretty retro).. which im thinking of bending the pins (so it will still fit in the pcb) and soldering 2 wires to them to clone like the window button (still thinking about which button would make the most sense).

so the encoder would function the same but then it doubles as a spare button for a switch that gets a lot of use.

just for thought but i might give it a go next time the mpc is in bits.

scoobylol wrote:It's worth mentioning the part that is listed by Uno in the original post is not suitable for every 1000 PCB.

http://www.vstservice.com/p-706-akai-mpc-1000-rotary-encoder.aspx

This link explains why, and I can confirm the same thing happens with this part on my 1000. I ordered a handful myself from Farnell and have had the exact same bug that is described via the link above.

It does say there is no way to check on the board, but I believe the difference is in the original rotary encoder. I notice that the part Uno took out was actually metal-bodied already, whereas mine was completely plastic.

From talking to Mike at MPC Stuff as I'm looking to replace that PCB in its entirity due to lots of other components failing, I know that the two boards contain different rotary pots... which is confirmed by me and Uno having different parts.

So I can only assume that if you have an earlier PCB with a completely plastic encoder, the search will still have to continue. IF however you have a board that has the later upgrade and a metal bodied encoder, then this part should be ideal!

Ok, I was about to buy encoder from mpc-stuff when I read on their site it's not suitable for older units (metal vs plastic body) and there is need to exchange PCB.

My question is:

on the jjos you can choose between type 1 and type2 of jogwheel.. is't that resolving a problem?
On my old 1000 I have to set type1 to work, coz if I choose type2 it does not seem to work at all (skipping very much)

I also found ALPS EC12E2420401 which has metal body, 12mm, 24pulses. Looks the same (3pins) just 25mmheigh, almost like in original post (EC12E2420404).

Anyone? Is there another more relevant topic?

I myself have never had issues with the plastic to metal encoder change.

To make this mod work on the old type (blue 1000) you need to:

• file down encoder shaft so it is not only shorter, but also has the flat notch on one side (0.2 mm above metal base ring is perfect)

• invert the first and third pin on the encoder, as a straight plug in will be reversed (meaning left = right). This can be done by bending the pins up to prevent them from entering the thru holes and then soldering wire extensions to the opposite solder point (1 to 3, 3 to 1) another method is to solder in as normal, then cut tracks to pin 1 & 3 to then run inverted cables to next solder points (1-3, 3-1)

The encoder will skip a value between clicks but with wear and familiarity it is more than easy to access values between clicks.

Beatdiggerjazzcat wrote: The encoder will skip a value between clicks but with wear and familiarity it is more than easy to access values between clicks.

i have that problem on my newer MPC where i changed immediatedly the encoder to get rid of that problem.
wasn´t working out ( a alps ) i hate that behave

if somebody would sell a "ra-ta-ta-ta encoder", please pm me !!!!
i LOVE the ratatata
i have two 1Ks side by side, would like to get similar feel and behave of the encoder.

please sell me somebody that ole ratata- shit

Does anybody know, if only the Akai "MPC 1000 BK-N" has the new encoder/PCB-Board??
Does everybody who did this mod succesfully have an MPC1000 BK-N?
Ever since i read this thread i was trying to find a BK-N, but havn't been successfull at all, everybody just sells MPC 1000 BK's...
as i have heard the 'N'-version was just sold in japan, which would explain why i cant find any, but wouldnt explain how some people were still able to do this mod....

any help would be very much appreciated.
Lutz

Well, i just answered my own question

just bought a different mpc yesterday night, opened it up... and it was a meta encoder.

however it is a mpc 1000 bk... not a mpc 1000bk-n

so obviously there are mpc 1000 bk units with the new pcb-board out there..
maybe the product-number could give a hint about the insides...

http://www.ebay.com/itm/400304529878

metal encoder with the right height, $10 + shipping

Looks like this is an older thread but I'm having similar problems. I just installed a new right side board and the wheel is skipping two moves for one click.

Has anyone found a way to remedy this without swapping back the Rotary Encoder for the original older model? I really was hoping to avoid soldering....

thanks.

I'm running Akai OS