Reworked OB1.4 open beam printer

pinshape

I just swapped out my old printer for the new 2020 profile, which I had to amend and resize from the original 1515 design. It's now up and running and I'll be posting updates as I fine-tune its performance. I've also made some changes to the printer's size, increasing it to a 300x300x400 print area with a maximum height of around 500mm if possible. The internal frame dimensions are 360x500, while the external dimensions with protrusions come out to be about 500x600mm and will be approximately 600mm tall. I'm still double-checking my calculations and finishing up the last pieces of the main frame. If you start printing before the frame is fully assembled, you might end up reprinting some parts due to minor issues like one or two edges not having the same level of refinement as the original design. This is mainly because of my limited knowledge and use of TinkerCAD for the conversion process. As for the color choice, I had a couple of kilograms of PLA sitting around with no plans, so I decided to load purple into my Wanhao i3 and tangerine into my XYZ Da Vinci 2.0a. It could have been tri-colored if I had built up the delta printer I have in a box while waiting for the last few parts from China. The cost of the 2020 profile was around 5 meters, which I got from two 3-meter lengths at £19.80 each (£6.60 per meter delivered next day). I also bought some nuts and bolts, most of which I already had, along with 2 kilograms of PLA for £21.58 from eBay UK. The T-nuts were printed using the M4 T Slot nut design by daGHIZmo. The majority of the frame is now assembled, but I found one flaw in my design - the 500mm uprights need to be shortened by 50-75mm before I can create a cutting list for the profile. Here's the 2020 profile cutting list: * 4 x 360mm crossmembers (2 front and 2 rear) * 2 x 500mm side horizontals * 2 x 425mm side verticals * 2 x 400mm side braces * 1 x 450mm top crossmember The left and right top pieces are being reworked to give more print height. I've also repaired weaknesses in the XMotor and Xidler pieces. I'm now waiting on delivery of all metalwork and electronics, so there's a short break on this project. The required parts include: * 4 x 500mm 8mm linear rods * 10 x 8x15x24 linear bearings * 10 x 8mm bearing mounts (6 for the carriage Y axis and 4 for the extruder X axis) I've also turned the Y access drive belt from vertical to horizontal for easier access and fitting. The bed construction is mostly complete, allowing me to print cases for the iPad Air instead of just phone cases. I changed out the bearing mounts as they were over-specified, showing me how much friction was possible with slight misalignment. I re-designed simpler and more flexible carriers, saving filament and making printing easier. I deliberately left no holes for the bed base to make assembly easier. The Y belt attachment didn't adhere well when printed and lifted both ends, but this doesn't matter as long as the center is mounted securely. The X carriage was also amended and printed in one fixing with cable ties, allowing quick changes for future mods like a laser or Dremel. I replaced the original X carriage on 21/11 due to an error - I had uploaded a file that was 2.75mm too long as I had to use a delta printer that was printing short on the Y axis and forgot to delete that file. The first print was a 20mm cube to check calibration, but it needs some tuning. I also sorted out a Repetier firmware problem caused by an Arduino issue hanging onto original values in the Eprom. I should have known better than to configure and print for the first time on Friday the 13th! I'm currently using a temporary heated bed until my 300mm one arrives, so I popped in a 220mm one for testing. I've also changed the bed carriage and Y belt attachment to give more height and improved flexibility. Print settings: * Rafts: Doesn't matter * Supports: Doesn't matter * Resolution: 0.2 * Infill: 40%