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Need Help replacing missing upgrade part.  

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Allen8355
(@allen8355)
Trusted Member
Need Help replacing missing upgrade part.

I'm upgrading my MK2.5 to a MK2.5S as part of the upgrade kit to add a MMU2S.

My problem is a cable that should have been included was missing. Yes I wrote to Prusa Support two days ago but haven't heard a peep back.

Part of the upgrade is disassembling the extruder, and replacing the filament sensor. The NEW filament sensor has THREE pins, the old one has FOUR pins. The instructions say to discard the old 4 wire cable, and install a new 3 wire cable, but the new cable is MISSING.

Can anyone help me convert the OLD cable into a NEW cable. The old cable had red, white, blue and black wires. The new cable I don't have has red, white and blue wires. I'm guessing they both plug into the motherboard the same place.

So can anyone help me hook the old filament sensor cable to the new filament sensor?

Posted : 26/03/2019 9:26 pm
james.w11
(@james-w11)
Active Member
Re: Need Help replacing missing upgrade part.

I ran into this as well, I think you are missing the new red, white, and black wire IR sensor cable which has a narrow 3 pin connector on one end. I'm not enough of an electrician to help you with making a cable. When it happened to me, I got on the chat box with Prusa and they mailed a replacement IR sensor cable to me. When it arrived, it worked correctly with IR sensor which is different from the old optical sensor that the old cable went to.

Posted : 28/03/2019 11:10 pm
maxx78
(@maxx78)
Estimable Member
Re: Need Help replacing missing upgrade part.


I'Yes I wrote to Prusa Support two days ago but haven't heard a peep back.

Always use chat, mail takes forever.

Posted : 29/03/2019 11:33 am
cwbullet
(@cwbullet)
Member
Re: Need Help replacing missing upgrade part.



I'Yes I wrote to Prusa Support two days ago but haven't heard a peep back.

Always use chat, mail takes forever.

Concur with this. Get an answer now by using chat.

--------------------
Chuck H
3D Printer Review Blog

Posted : 29/03/2019 11:56 am
EddyMI3D
(@eddymi3d)
Eminent Member
Re: Need Help replacing missing upgrade part.


I ran into this as well, I think you are missing the new red, white, and black wire IR sensor cable which has a narrow 3 pin connector on one end. I'm not enough of an electrician to help you with making a cable. When it happened to me, I got on the chat box with Prusa and they mailed a replacement IR sensor cable to me. When it arrived, it worked correctly with IR sensor which is different from the old optical sensor that the old cable went to.

The black/white/red one is for MK3 -> MK3S
The blue/white/red one is for MK2.5 -> MK2.5S

Posted : 30/03/2019 8:56 pm
rj1307
(@rj1307)
New Member
Re: Need Help replacing missing upgrade part.

I also had this problem, but I made an old cable. Pull out all the wires from the 4-pin plug with the latch (you have to unlock them), take a sharp knife and cut off one segment from the plug and make a 3-pin from it. Also cut the latches. Insert the wires back as in the picture.



Posted : 01/04/2019 6:09 pm
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