Hello there,
Im a prusai3 user and just updated my ramps to the smoothie board. It seems that I got some luck to hook up everything correctly and made it work.
However, I have two questions regarding the extruder calibration and speed.
For the extruder part, when I calibrated the stepper motor for my extruder, I found that the movement was very slow. I checked the marlin setting for the extruder and found this
#define DEFAULT_AXIS_STEPS_PER_UNIT {80,80,400,750} // default steps per unit for Ultimaker
#define DEFAULT_MAX_FEEDRATE {500, 500, 2, 25} // (mm/sec)
In comparison with the default setting in Smoothie board, it shows:
extruder.hotend.steps_per_mm 140 # Steps per mm for extruder stepper
extruder.hotend.default_feed_rate 600 # Default rate ( mm/minute ) for moves where only the extruder moves
Marlin shows the feedrate is mm/sec and smoothie board shows mm/minute. I wonder if this is the case caused the slow movement of the motor? Also, the default motor setting in smoothie board for XYZ seems quite similar to marlin, but the extruder one is very differet ( 750 vs 140 ) I wonder if this is also something to do with the feedrate as it’s calculated mm/ minute?
Second question, I was told that Smoothie board makes the marchine print much faster than the ramps, I wonder in what sense it can be much faster? Is it simply just becasue the processor is better?
I assume that we all know that there is speed setting in any gcode generation program, for instance, slicer ( under the speed setting ), is it just by tuning the speed with higher value, then my machine will move faster? If this is the case, I can do this with my old machine and smoothie board doesnt give me any advantage. If I should change any setting in the config file to make it move faster, what is it?
Im printing the same object in the printer with ramps, it took me 10 mins, but the one with smoothie board took 12 mins…. I wonder how this would happen. Please help me with providing some technical details.
Many thanks.
Best,
Nicholas
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