With the new 64bit firmware, there seems to be an increase in stepper motor speed. This is not a change in esteps as the parts are correct

Thank you very much David. I've downloaded the the Raspian Desktop, but haven't imaged an SD Card yet.

I have Putty installed, so I can use SSH, but I do not know Linux. I'm capable of following instructions I see here and there, but that's it.

Thanks again.

windows does not show the sdcard linux file partion by default. I have an old chromebook which I hacked to run ubuntu and I was able to access the files that way. You could download a "live" linux distro which you can load on an sd card and boot your computer from ( it does not install anything on your computer unless you ask it to) but gives you a linux desktop os unitil you reboot the computer. One option would be to download Rasperian with desktop onto a second sdcard and boot the rasperry pi from that and use a usb sdcard reader to mount the Panada pi sdcard. This will give you a linux desktop that you can view and edit the files. The other option would be to install the desktop one your raspberry pi and use a hdmi monitor , keyboard and mouse. Of course if you know linux command line, you can edit the files via ssh ( not for everyone). The 32 bit os ran fine so no editting should really be needed. I only had the increase in speed when I went to the 64 bit image.

I am missing something (understanding). I only see three editable files when logged into my Pi' IP address; pins_PANDA_PI.h, Configuration_adv.h, and Configuration.h.

Using the example from Yue Mark in his post above, I did a search for "PANDAPI" marlincore.cpp, and I get no results, so it is not looking for the search phrase, or the fact that the image I am using is the latest 32 bit version. (Even with the documentation, I have no idea how to integrate components. It is well beyond my understanding) Editing Marlin is simple in the Arduino IDE, but the file structure isn't exposed even when I take the SD Card out of the Pi and attempt to edit it on the computer.

To test the Search capabilities, I did a search from Configuation.h, looking for "Servos" pins_PANDA_PI.h. I did not find it, and it does not find anything in another file using the example format.

What am I missing?

search "PANDAPI" marlincore.cpp as the following, you can change the value for calibrate the speed. e.g. increase the 42 to higher value will slow down the speed.

 //  PANDAPI
  int pi_n=read_version();// 
  if(pi_n==-4)//pi4b
  	step_motor_init(stepper.isr,42); // 
  else if(pi_n==3)//pi3+
  	step_motor_init(stepper.isr,12); // 
  else //if(pi_n==-3)//pi3b
  	step_motor_init(stepper.isr,12); //