Hotend Mount for Davinci CoreXY by applesan

Last crawled date: 3 years, 2 months ago

This is a hotend mount for the CoreXY carriage. It was made for ZombiRon's "XYZ DaVinci CoreXY Mod".
I used m3 and m4 screws from a pack of assorted screws. See below for examples of the parts used for this project. If anyone wants exact measurements of all the screws I used, then let me know. I printed everything on an sla printer because they are the most accurate. I also used long LM8UU bearings for now to ensure alignment. If everything is lined up then I'll switch to the igus bearings. Igus bearings lock/bind up if not perfectly aligned in my experience.
I've Included two different mounting options. One has the BLTouch perpendicular to the hotend and the other one has the BLTouch parallel to the hotend. I originally designed it parallel to the hotend. I then realized I could save some space if I rotated the BLTouch.
The perpendicular mount saves some space but the parallel mount looks nicer because the wires are facing the back of the machine.
This uses TMC sensorless homing for the X and Y. I have mine set to 80 for the X and 85 for the Y. The setting is in Configuration_adv.h
//#define X_STALL_SENSITIVITY 80
//#define Y_STALL_SENSITIVITY 85
I recommend printing the Perpendicular because it saves space.
I've already took out the control board and am using Marlin on an Skr 1.4.
The probe offset for the perpendicular is:
//#define NOZZLE_TO_PROBE_OFFSET {-24, -2.75, -1 } //Please verify this when mounted.
The probe offset for the perpendicular is:
//#define NOZZLE_TO_PROBE_OFFSET {-27, 0, -1 } //Please verify this when mounted.
I also needed a different stepper mount for my Da Vinci Pro. That stepper motor mount is located in on the other page.
I had to invert the X and Y motors. You may not have to because I did a lot of rewiring.
//#define INVERT_X_DIR true
//#define INVERT_Y_DIR true
Here are my settings for the print bed dimensions.
//#define X_HOME_DIR 1
//#define Y_HOME_DIR 1
//#define Z_HOME_DIR -1
// The size of the print bed
//#define X_BED_SIZE 209
//#define Y_BED_SIZE 200
// Travel limits (mm) after homing, corresponding to endstop positions.
//#define X_MIN_POS -57
//#define Y_MIN_POS -2
//#define Z_MIN_POS 0
//#define X_MAX_POS 227
//#define Y_MAX_POS Y_BED_SIZE
//#define Z_MAX_POS 190
For the coreXY Kinematics, all you have to enable is the following:
//#define COREXY
I also made a stepper motor mount for the right side that lets the mod work with my Davinci Pro. Check it out here https://www.thingiverse.com/thing:4789354
Parts used in the build
Assorted screws: https://www.amazon.com/SZHKM-Stainless-Socket-Screws-Assortment/dp/B07M7756TH/ref=sr_1_1_sspa?dchild=1&keywords=m3+m2+m4+screws+assorted&qid=1615340158&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzSzM4TkYyRDJEVjc2JmVuY3J5cHRlZElkPUEwNTExODY4M0lSMDJGWjVTOEdHNSZlbmNyeXB0ZWRBZElkPUEwODAzMzI1NjNPUERJTjFMUVBGJndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==
Bearings: https://www.amazon.com/uxcell-Groove-Bearings-Double-Shielded/dp/B08198NQ7Y/ref=sr_1_1?dchild=1&keywords=685ZZ&qid=1615340492&sr=8-1
Extra wide GT2 Idlers: https://www.aliexpress.com/item/4000183519445.html?spm=a2g0s.9042311.0.0.56ee4c4dCSOyuC
Lock Collars: https://www.aliexpress.com/item/32826054805.html?spm=a2g0s.9042311.0.0.27424c4dxCRjsr
Extra stiff GT2 Belt: https://www.amazon.com/gp/product/B07KXRR9T7/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Long LM8UU Bearings: https://www.amazon.com/uxcell-LM8UU-Linear-Bearings-Length/dp/B07H94L2NR/ref=sr_1_13?dchild=1&keywords=lm8uu+bearing&qid=1615340853&s=industrial&sr=1-13
8mm igus bearings: https://www.amazon.com/Igus-RJ4JP-01-08-Printer-Bearing-replacement/dp/B07B3PZ7JH/ref=sr_1_1?dchild=1&keywords=8mm+igus&qid=1615341981&s=industrial&sr=1-1