Sunday, 31 May 2020

XYZ Davinci Pro and Prusaslicer

Introduction

The XYZ Davinci Pro slicer is not particularly configurable, and if you have replaced elements such as the hot end and nozzle size and the extruder, it doesn't provide sufficient access to create effective g-code.

The Prusaslicer comes with a number of pre-configured machines and filaments, but the XYZ Davinci Pro isn't included amongst them.

PrusaSlicer Configured for the Davinci 1.0 Pro

Configuring the Printer

Once the software is installed, you should select the settings gears icon next to the printer drop-down.

General Settings


Max Height: 200
Z-Offset: 0
Number Extruders: 1
Print Upload: section is not applicable, you must use the XYZ or minimover software for upload.
G-code flavour: Marlin
Relative E-Distances: No
Firmware Retractions: No
Volumetric E: No
Variable Layer Height: Yes

Bed Shape: 200 x 200
Origin: 0, 0
Texture: Useful so you can remind yourself where the door is - note that the image is effectively upside-down - Save a copy of this image if it helps ... it is recommended that you save the file in the .PrusaSlicer folder so that all of the configurartion files are together.

Davinci Pro Bed Texture Image

Custom G-Code


The Custom G-Code us used to configure the printer at the start and end of the prints.  It also allows code to be inserted between layers, which is particularly useful with more advanced configurations.
The Custom G-Code accepts variables such as layer height and temperatures, and also accepts conditional statements.

The XYZ software is slow to start up, and only does one thing at a time - raise the bed, start the head heating, then start the bed heating.  It also lowers the bed after you press a button at the end of the print.  This G-Code attempts to speed these things up.

Note that the LCD panel on the printer is disabled until the monitor M108 command is seen in the G-Code, so it is essential that this is included as a minimum if you ever want to get to the Cancel menu option (for example) during a print.

The G-Code files can be found in the zipfile at the bottom of this blog.

Machine Limits

At the moment, I've left this section unedited as I've not experimented to identify what the actual limits are, so these can be left at their default.

Extruder 1



Nozzle Diameter: 0.4 for the stock extruder
Layer Height Min: 0.1
Layer Height Max: 75% of your nozzle diameter
Retraction: 2mm
Retraction Speed: 60mm/s
Wipe While Retracting: Yes
Retract Before Wipe: 10%

Note: As this is a bowden style printer (the drive is remote from the head), the control of the actual filament at the head is subject to inaccuracies due to the properties of the filament (e.g. elasticity).  Wiping while retracting can compensate somewhat for this.

Note on Retraction: If this is too far, or too fast, it can pull molten filament up into the heatsink part of the head, which can then cool and never melt again, causing a blockage.  Keep the retraction under 3mm.

Saving

Save the printer settings - if you have a head that allows you to change the nozzle size, make sure the nozzle size is part of the save name.

Now return back to the 'platter' tab / page.  You should now see that the print bed is using your texture.

Configuring the Filament


Select the settings gear icon next to the filament and create a new filament.

Unfortunately here, you don't seem to be able to copy / use the stock filaments database with your custom printer, but you can look at them at least.



Filament settings are normally specific to manufacturers and not printers. however, if you have replaced the extruder with one that passes filament at a different rate, you will need to compensate for that here, as the firmware on the printer assumes you are always using the default XYZ extruder.

If you have modified / replaced the extruder, you will have to compensate with the extrusion multiplier - start by setting the extrusion multiplier to 100 / actual amount of filament fed when 100mm requested - seem my blog on replacing the extruder for more information on measuring this.

It is important that you also set the maximum flow rate for the filament in the Advanced settings.  Now this will depend on whether you are using the stock hot end or have upgraded.  The maximum flow rate figures also need adjusting to compensate in the event that you have modified / replaced the extruder.

My settings are as follows:


Files Download

Settings Bundle: prusaslicer-davincipro-settings.zip


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