Has anybody upgraded just the heated bed to MK52?  

MK2 steel sheet

Could you explain how you did that? I am trying to use a new steel sheet on top of the existing one but the calibration does not line up because it cannot catch all the points on the bed. I have not been able to find a 3.9.3 firmware upgrade so I can only assume there could be a different firmware but am not sure how to make the modifications. Thanks.

Posted by: @danielkrah

I am using 3.9.0 on my MK2. I switched to 24v and now use a mk52.

But i have to mod the firmware now again.

RE: Has anybody upgraded just the heated bed to MK52?

i am using this fork and configured it to match my needs.

https://github.com/cimoalpacino/Prusa-Firmware/tree/MK2S_3.9.0_RAMPS

haven't watched the source code for some time but maybe it is only enabling 1 variable.

MK2 steel sheet

Could you explain how you did that? I am trying to use a new steel sheet on top of the existing one but the calibration does not line up because it cannot catch all the points on the bed. I have not been able to find a 3.9.3 firmware upgrade so I can only assume there could be a different firmware but am not sure how to make the modifications. Thanks.

Posted by: @danielkrah

I am using 3.9.0 on my MK2. I switched to 24v and now use a mk52.

But i have to mod the firmware now again.

MK3 steel sheet for MK52 heatbed base

I do not know if this makes a big difference but I am back in my lab using the printer and the priner itself is a 1_75mm MK2 with a MK52 heatbed base and I am using a new magnetic heatbed steel sheet MK3 onto the original heatbed.

Posted by: @danielkrah

i am using this fork and configured it to match my needs.

https://github.com/cimoalpacino/Prusa-Firmware/tree/MK2S_3.9.0_RAMPS

haven't watched the source code for some time but maybe it is only enabling 1 variable.

RE:

Where would you able to get 3.9.0 for an MK2 printer? The best I could get was the MK2.5 3.10.0 on the MK52 bed but the selftest fails.

Posted by: @danielkrah

I am using 3.9.0 on my MK2. I switched to 24v and now use a mk52.

But i have to mod the firmware now again.

RE:

Hey, 

Where do you pull up this firmware to change it? Is it done through the prusaslicer, pronterface, or elsewhere?

Posted by: @mrcin

@jacada

I had the same problem. Solved it with the latest firmware (3.9.3) with some changes (you need to compile the firmware though)

1. Use the Mk2 config (1_75-MK2-..... definitions header)

2. change

#define MANUAL_Z_HOME_POS 0.2

3. add

#define HEATBED_V2
#define STEEL_SHEET
#define NEW_XYZCAL  
#define SHEET_PRINT_ZERO_REF_X 0.f
#define SHEET_PRINT_ZERO_REF_Y 0.f

I also changed mesh definitions to those of mk2.5, but not sure if it is necessary. 

#define MESH_MIN_X 24
#define MESH_MAX_X 228
#define MESH_MIN_Y 6
#define MESH_MAX_Y 210

compile firmware:

How to compile the firmware is described here: https://github.com/prusa3d/Prusa-Firmware

wbr,

Karl

MK2 will NOT work with any official FW for MK3 or MK2.5

shono51, yes, as you can see, some people modified their printers, modified their firmwares. But as I told you, you can not use the original firmware for MK3 or MK2.5 on your MK2 unless you strongly rewrite it and/or replace couple of HW pieces for new one. 

You wrote you are new to Prusa. So I expect you have no idea, what are the changes between the models in FW or HW. There for you should stop experimenting with loading different firmwares and making random changes in HW and FW. 

Heated bed MK52 exists in two version, one is for MK2.5 and another one is for MK3. It works on different voltage, so it is not interchangeble. Be carefull. Do not try to load MK3 FW, it is far to different. If you really want to destroy your working MK2, experiment better with FW for MK2.5. Your calibration will not pass, simply because new heated bed and firmware for MK2.5 or even MK3 also comes with different calibration probe (PINDA). So old PINDA with new heated bed will probably not work. Also calibration points are on different places. Not sure what else makes a difference, maybe bondtech gears load filament a bit different way than old gears, maybe noctua fan is controlled different way then old fan. 

You should have written, why you want to load new firmware. Now we can see, that you want to use a magnetic steel plates. Yes, this is a great thing. So unless you want to rewrite firmware yourself, you can use anything provided by community. Maybe the one from danielkrah is fine, do not know. But for sure you will need to adapt your HW accordingly.

MK2 uncompatibility

Thank you for the detailed reply. So not only will the firmware be different, but the entire printers hardware would have to change to be compatible with the MK52 heated bed as well as the MK2.5 firmware. I would just like to confirm that the MK2 will not be compatible with the MK52 or MK2.5 firmware unless there are modifications in firmware as well as getting the proper PINDA probe and other hardware items to become compatible? If this is the case, would it be easier to invest in a whole new MK2.5 or MK3 printer or is there anything I can do without having to purchase a whole new printer. I am working in a lab for a professor at my university and he gave me this task of figuring this out. I want to make sure I have all the facts so I can report to him with all the available options. I appreciate you taking the time to give me a thorough explanation. 

Posted by: @milos-v

shono51, yes, as you can see, some people modified their printers, modified their firmwares. But as I told you, you can not use the original firmware for MK3 or MK2.5 on your MK2 unless you strongly rewrite it and/or replace couple of HW pieces for new one. 

You wrote you are new to Prusa. So I expect you have no idea, what are the changes between the models in FW or HW. There for you should stop experimenting with loading different firmwares and making random changes in HW and FW. 

Heated bed MK52 exists in two version, one is for MK2.5 and another one is for MK3. It works on different voltage, so it is not interchangeble. Be carefull. Do not try to load MK3 FW, it is far to different. If you really want to destroy your working MK2, experiment better with FW for MK2.5. Your calibration will not pass, simply because new heated bed and firmware for MK2.5 or even MK3 also comes with different calibration probe (PINDA). So old PINDA with new heated bed will probably not work. Also calibration points are on different places. Not sure what else makes a difference, maybe bondtech gears load filament a bit different way than old gears, maybe noctua fan is controlled different way then old fan. 

You should have written, why you want to load new firmware. Now we can see, that you want to use a magnetic steel plates. Yes, this is a great thing. So unless you want to rewrite firmware yourself, you can use anything provided by community. Maybe the one from danielkrah is fine, do not know. But for sure you will need to adapt your HW accordingly.

guide

If you need just to use the MK52 heated bed, first make sure it is for MK2.5 (12V version), second you might need as well the MK2.5 PINDA. And then you would need MK2 firmware with modified calibration part. The firmware, I hope, you can get here from the guys who did this change. Just do not try to use original firmwares, it is not the way.

So it would be good, is the guys who really did this, could give you some nice step by step guide, what to do.

RE: guide

I will look into that. I am not sure how to go about making modifications and do not want to mess anything up so I will collaborate with my superior. Thank you. 

Posted by: @milos-v

If you need just to use the MK52 heated bed, first make sure it is for MK2.5 (12V version), second you might need as well the MK2.5 PINDA. And then you would need MK2 firmware with modified calibration part. The firmware, I hope, you can get here from the guys who did this change. Just do not try to use original firmwares, it is not the way.

So it would be good, is the guys who really did this, could give you some nice step by step guide, what to do.

RE:

Using MK2 printer with 12V Mk52 bed and sheet steel, I have been able to modify and compile FW through the Arduino IDE. The FW flashes through PrusaSlicer and the printer functions EXCEPT for the display. It just shows FWRJFWFWJFWJFW.......

I am able to hold the scroll wheel and twist to manually move the Z axis so I know the printer is "operational" except for the display. 

I deleted the LiquidCrystal library from the ProgramFilesX86/arduino. I also added LiquidCrystal_I2C library since one of the FW headers includes it. 

Could only get the FW to flash successfully and printer to move Z axis when I selected ATMEGA 2560 as the board.

Any ideas to try to fix the display? 

RE: Has anybody upgraded just the heated bed to MK52?

When compiling do nit select ACR Mega 2560 as Board, but select RAMBo from RAMBo AVR Boards. But first add

https://raw.githubusercontent.com/ultimachine/ArduinoAddons/master/package_ultimachine_index.json

to preferences in the arduino ide.

See also: https://reprap.org/wiki/Rambo_firmware

Then the LCD will work.

RE: Has anybody upgraded just the heated bed to MK52?

@mrcin:  Thank you for sharing your github.  I am looking to upgrade to the MK52 bed without touching anything else on the MK2S printer, so your firmware version will help a ton!  BTW, do you use the original PINDA probe that came with your MK2S or did you upgrade it to PINDA v2?  Do you also happen to know what would be the advantage of going to PINDA v2 or the disadvantages of staying with the original PINDA?  I am interested in making sure the XYZ calibration works, hence why I intend to use your firmware 🙂  Thank you!

RE: Has anybody upgraded just the heated bed to MK52?

Posted by: @jc-4

@mrcin:  Thank you for sharing your github.  I am looking to upgrade to the MK52 bed without touching anything else on the MK2S printer, so your firmware version will help a ton!  BTW, do you use the original PINDA probe that came with your MK2S or did you upgrade it to PINDA v2?  Do you also happen to know what would be the advantage of going to PINDA v2 or the disadvantages of staying with the original PINDA?  I am interested in making sure the XYZ calibration works, hence why I intend to use your firmware 🙂  Thank you!

Hi. PINDA V2 differs from V1 with the addition of the temp sensor. I have not noticed any accuracy difference with V2. Go with V1 or V2 if you have one. It does not really matter.

RE: Has anybody upgraded just the heated bed to MK52?

Thank you! I have ordered the MK52 bed.  I will post back here with my experience in upgrading to that using your firmware tweaks.

RE: Has anybody upgraded just the heated bed to MK52?

was there ever a reply on this? I had done the same with a mk52 bed on a mk2s, no other upgrade (so no PINDA V2), and was printing fine until recently. For context, I have had a G28 loop whenever I try to print that I need to fix by reflashing the firmware (some kind of corruption), only issue is I don't remember what I did to the firmware originally. I went to check out mrcin's git link but his readme erroneously refers to "PINDA_TEMP_SENSOR" in the "config" but such a variable does not exist. 

RE: Has anybody upgraded just the heated bed to MK52?

Sorry, I changed my mind and decided to do the full upgrade.  Bought all the parts from aliexpress... The kit worked well except it did not include enough 10mm screws so I had to buy some of those elsewhere.

RE: Has anybody upgraded just the heated bed to MK52?

Posted by: @cool_fox

was there ever a reply on this? I had done the same with a mk52 bed on a mk2s, no other upgrade (so no PINDA V2), and was printing fine until recently. For context, I have had a G28 loop whenever I try to print that I need to fix by reflashing the firmware (some kind of corruption), only issue is I don't remember what I did to the firmware originally. I went to check out mrcin's git link but his readme erroneously refers to "PINDA_TEMP_SENSOR" in the "config" but such a variable does not exist. 

Hej. It is a little bit of ancient history to me as I moved to another board, but the entry you mention is in Firmware/variants/1_75mm_MK2...... header file. 1_75mm_MK22-RAMBo13a-E3Dv6full.h in my fork. Then you copy this header file onto the config file one level down IIRC 

RE: Has anybody upgraded just the heated bed to MK52?

Kinda late in the game as I missed all the upgrades ever since I bought an MK2 7 years ago.  I just successfully upgraded to MK2.5S+ running the latest firmware 3.13.2.  Started out with MK52 bed then got such much involved and decided to go full blown.  The process is straight forward thanks to all good documentations and Amazon 🙂 It was not as convoluted as initially thought.  This thread really gives me inspiration to go a long way.