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Re: Prusa i3 Aluminium unexpected motion problem

Posted: Wed Jan 06, 2016 5:49 pm
by balearic.dynamics
I am supposing the same. Or a problem related to the wrong management of long / integers during compilation, wrong casting or similar. Now I am doing a counter-test:

Set the slicer feed rates to almost absurd values, like 1 and 2 Then the result in the generated gcode is between acceptable ranges. If this work, I will try to modify the firmware feedrate calculation simplifying the formula and splitting it in more parts.

As I have finished the test cycles I will post an update anyway.

Enrico

Re: Prusa i3 Aluminium unexpected motion problem

Posted: Fri Jan 08, 2016 6:21 pm
by balearic.dynamics
Mark,

Now setting these low values the printer moves. Not fine because the values are too low in some cases but the problem on the z-axis occurs only when there is normal feedrates set in the slic3r with the Repetier host (take in account that I have saved the various kind of slic3r settings.

Exploring the firmware Medel_main.cpp it seems that for some strange reason the feedrate forumla

Code: Select all

feedrate/60 
does not do the float division correctly. And this has not so much sense for me.

Hope you can suggest something else...

Thank you. Enrico

Re: Prusa i3 Aluminium unexpected motion problem

Posted: Sat Jan 09, 2016 3:43 pm
by Mark
sorry don't quite familiar with the firmware and formula...guess the mainboard is faulty somewhere...

Re: Prusa i3 Aluminium unexpected motion problem

Posted: Sat Apr 08, 2017 4:43 pm
by 3dtech
M502 loads the configuration settings that are preset defaults.

M500 then saves the current settings to eeprom which are then loaded at power-up or reset. 3d printing service visakhapatnam kochi india



I had a problem once when my printer started doing strange things after firmware update and this fixed it. It was because the new firmware stored config settings in different locations in eeprom.