Changelist

The following changes were made with respect to the original 2.5 DXL version by AndrewBCN:

ADDS

1. [Initial commit] Two spool holder brackets added with their respective fixing holes;

2. [Initial commit] Four elements added to block Y-axis rods (with their respective fixing holes);

3. [Initial commit] Two elements added to block Z-axis rods (with their respective fixing holes);

4. [Initial commit] Two elements added to reinforce the frame base (with their respective fixing holes);

5. [19/09/2017] There are now two variants of the Y idler: one with a 3mm hole diameter and one with a 5mm hole diameter;

6. [05/11/2017] Two holes added in the center of the print bed: now it's possible to fix the "Y idler" printed part to the print bed in both directions, forwards or backwards;

DELETIONS

1. [Initial commit] Both fixing holes for NEMA17 motors in the lateral panels were eliminated (they both were in rather uncomfortable positions, moreover one of them turned out to be useless because of the mounting position of the power supply which covers it almost completely);

2. [Initial commit] Some holes in the front and back base panel were eliminated because of them being too close to the fixing holes previously added (see 4) );

3. [02/11/2017] I've deleted the big hole behind the Arduino Mega 2560 fixing zone, that was first made by AndrewBCN in his 2.5 version of the frame. I've left both versions available for the download in the blocks directory. Choose the one you prefer;

4. [10/01/2018] I've deleted the print_bed_bearing_clamp block since it turned out not to be a good solution in practice. It's way better to 3Dprint one of the bearing clamp designs inside printed_parts folder;

5. [26/02/2018] I've deleted one useless hole from the Arduino Mega lateral frame.

MODIFICATIONS

1. [Initial commit] I've modified the Y-idler element. I've enlarged it a little just to be able to move the bearing fixing hole. The hole was moved down and forward (just like toolson did with his printed parts), then its diameter was reduced to 3.2mm. This way, to assemble the mechanical parts of the printer, only M3 screws are needed. It's recommended to use a 20 teeth GT2 pulley with a 3mm bore bearing to avoid micro-vibrations caused by the non-flat side of the belt running around the flat surface of a normal bearing. Otherwise you can also use the 5mm bore version of the 20 teeth bearing, having firstly drilled the hole up to that diameter;

2. [21/05/2017] I've fixed the Arduino MEGA 2560 fixing holes (this should avoid the need of printing this offset adapter from toolson). Now it's possible to screw in the correct position an Arduino MEGA 2560 to the Arduino Mega lateral frame;

3. [02/11/2017] I've made two distinct versions of Y_axis_base block: one is in the front (with fixing holes for the two reinforcement blocks and fixing holes for a LCD case), while the other is in the rear (with fixing holes for Y endstop mount);

4. [02/11/2017] I've enlarged the width (from 15mm to 25mm) and the height (from 8mm to 12mm) of the holes behind the two Z axis stepper motors: they did not permit the 4pin Dupont connector of the steppers to pass through them;

5. [11/11/2017] I've enlarged a bit two of the holes in the print bed: now they're symmetrical and the bed is a little less heavy.