Mk2.5 upgrade issues
I have just upgraded my mk2s to the mk2.5 but am unable to complete either the self test or xyz calibration. It continually fails the selftest on the left hotend fan although l can get it to work if l go through the settings ->temperature->fan speed so l'm stumped on what could be wrong here.
And with the xyz calibration it detects the x and y endstops but when l run it to the top of the z and agree both are level it drops a little and says calibration failed and to check the axis. I've also upgraded to the mk2 mm if that makes a difference. If l can't get it to work seriously considering downgrading back to my mk2s which worked perfectly.
Re: Mk2.5 upgrade issues
Dumb question, you did install the MK2.5 firmware, and made sure to install the correct version for your RAMBo board?
The changes are more than just skin deep, the printer won’t just know it’s a 2.5 without the new firmware.
Re: Mk2.5 upgrade issues
Dumb question, you did install the MK2.5 firmware, and made sure to install the correct version for your RAMBo board?
The changes are more than just skin deep, the printer won’t just know it’s a 2.5 without the new firmware.
I made sure it was the correct firmware but l'm not sure whether the 2.5 to the mk2.5mm would affect it. l might try just installing the 2.5 firmare alone without the new 2.0 mm and see if that works.
UPDATE
Have tried this but still having the same problems :/
Re: Mk2.5 upgrade issues
Same problem ?? I get a fan error on my newly received Mk2.5S kit which was originally working fine. I was about to calibrate the nozzle height when I came to preheat the for PLA I got an error about a fan. So I re-ran the selftest.
The error say please check left hand hotend fan wiring error BUT this fan is powering up OK ???. It clearly stops the test before it tests the front cooling fan ??
Re: Mk2.5 upgrade issues
Same problem ?? I get a fan error on my newly received Mk2.5S kit which was originally working fine. I was about to calibrate the nozzle height when I came to preheat the for PLA I got an error about a fan. So I re-ran the selftest.
The error say please check left hand hotend fan wiring error BUT this fan is powering up OK ???. It clearly stops the test before it tests the front cooling fan ??
Prusa have told me it might be a faulty signal wire may be worth asking if they think you’ve got the same problem. I’ll tell you if this solves my problem when it arrives.
RE:
G'day Nathanab98,
I know it's a few years later... but do you recall ever resolving this issue? I have just performed the upgrade and have ran into the EXACT same problem.
Hope to hear from you!
Kind Regards,
The_Lamb
RE: Mk2.5 upgrade issues
An update for anyone else coming across this.
Troubleshooting the Z stop issue: I found that a pin connecting the new V splitter cable to the pinda probe had bent inside. Straightened up with a flat blade and reconnected.
Then I found that giving the blower fan a little 'flick start' boost at the precise time the print fan test begins, allows a menu to pop up asking if the fan is spinning or not. Click yes.
Managed to get the XYZ calibrated properly, but have now run into a thermal runaway issue 🙄 time to swap this finicky blower fan I think.
RE: Mk2.5 upgrade issues
When I upgraded to my Mk2.5S I found the new extruder geometry resulted in the print cooling fan to cool the heat block. My solution was to put a silicon sock on the heat block to protect it. Another solution is to reduce the part cooling.
Cheers
-Bob
Prusa I3 Mk2 kit upgraded to Mk2.5s, Ender3 with many mods, Prusa Mini kit with Bondtech heat break, Prusa I3 Mk3s+ kit