#Hemera e steps drivers#
We have a guide on the VREF values for the most common stepper drivers on the market currently that can be found here:.In order for Hemera to operate effectively at the correct torque level. The Hemera stepper motor in all likelihood has a different current rating than the previous motor your printer was using.
Check you have adjusted your VREF/ configured the correct amount of current the motor is being provided. Also, make sure before you do the E steps Calibration that you have activated relative mode.ģ.If you are entering the E step value via Gcode make sure you are following up with an M500 command in order to ensure the new settings are being saved to the Eprom.In order to get an ideal step per mm value, you will need to fine-tune these settings, a 100mm extrusion test is the best method of doing this.Whilst we state an E-steps parameter of 409 steps per mm, be advised that this is based on a microstepping value of 1/16, if you are using a different microstepping value your E-steps value will be different.If you are not familiar with which settings you need to change please see: Firmware modification is not an optional step, in order for your Hemera unit to work effectively you must make the outlined firmware modifications.Set e-step per mm in script to 409, the firmware is set to 394.87.Here are a few quick troubleshooting steps before contacting support in regards to issues you may be having with Hemera. Using 394.87 step/mm (as set in firmware) the pattern width is 2.57mm. Left: incorrect vref at 0.7v, Right: 0.96v This octagon was printed at 20,30,40,60,80 mm/s (bottom to top). I’m still not sure if my Hemera has something wrong, or it is just the result of this particular combination with the Ender 3’s stock board.
#Hemera e steps skin#
A slanting salmon skin can also be produced when setting the extruder step per mm slightly different from the firmware’s setting.Ĭorrecting the vref to 0.96v helps a little. I can produce a perfect vertical salmon skin when setting the extruder step per mm equal to the setting in the printer’s firmware.
#Hemera e steps full#
The result confirms that the pattern aligns with the E-stepper’s full step. I created a single wall octagon that each side has n * (mm per full step) long. To verify this observation, I wrote a script to generate G-code that will align the extruder’s full step on every layer. It seems like the extruder only moves on full or half steps. I tried to print even slower, and noticed that the extruder pulled the filament in not smoothly. What!! I always think that print slower = better result. The salmon skin pattern stays the same, but it’s much stronger when printed slower. I printed a cube in vase mode and got salmon skin on all sides. Increased vref to 0.7v, calibrated e-steps, etc. Background story: I bought E3D Hemera and wrongly set vref to 0.5v on the stock Ender 3 board.
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