Y-Axis Back Plate Assembly for MakerFarm 8", 10" or 12" Prusa i3v

thingiverse

Update 10/4/2019 See https://www.thingiverse.com/thing:3897503 for an update of this design using 2020 V-Slot for the Front Plate instead of plastic. Updated Dimension Image I updated the image showing the dimensions for the different i3v sizes. The dimension variables are in blue & the differences between the different sizes are shown. This is an assembly of parts to replace all the wooden parts on the back of Y-axis of Makerfarm i3v printers. I made this to replace the wooden Y-Axis back plate on my 10" i3v, but made versions for the 8" & 12" also. The 10" version are from measurements I took with a digital caliper. The dimensions for the 8" I received from Colin Farrer & the 12" dimensions came from the dxf file located here: https://github.com/DonKahones/MakerFarm-Prusa-i3v-12-Inch These parts consist of a left side back plate, a right side back plate, an oblong bracket, and a curved bracket. The left side back plate has 2 peg holes on the top. The right side back plate has 2 peg holes on the bottom. The oblong bracket has a f cut on each side. The curved bracket has a small hole for the allen wrench to line up the M3 hole in the V-Slot. To assemble these parts, first attach the left and right back plates together with the oblong and curved brackets before detaching your wooden plate. Then install the motor on the plastic part before attaching it to the frame. After you take off your back wooden plate, install the peg hole inserts in the bottom peg holes on left & right side vertical wood frame. When installing this assembly, I would assemble the Left, Right Back Plates with the oblong & curved brackets before detaching your wooden plate. You might also want to install the motor on the plastic part before attaching it to the frame. After you take off your back wooden plate, install the peg hole inserts in the bottom peg holes on left & right side vertical wood frame. The longest print will be the right side, which took me 9 hours to print for the 10" i3v. The total print time I had for all the parts was 16:56:43 & 6.53oz of PETG plastic. I printed these with 50% 3d honeycomb infill. For the top & bottom I used Octagram Spiral which makes the part look kind of cool. I used DXF files in conjunction with the openscad files. There is one DXF for each i3v version & you can change some of the cutouts there if you do not like the cutouts I used. The printer does have a more muted sound when the Y-axis is moving now. That is probably more to do with changing the wood to plastic than the hole patterns. The variables to change in the Y-AxisBackPlate_Rev.scad file for your specific machine are: i3v = 10; i3v_Width = 297; //10" i3v i3v_Vslot_Width = 189.58; //10" i3v i3v_Vslot_Offset = 62.9; //10" i3v i3v_MotorOffset = 141.0; //10" i3v In case you need to change the Heat bed Slot dimensions for an 8" i3v. These numbers seem to be the same for the 10" & 12", but maybe different for the 8". These dimensions are measured from the center of the V-Slot to the Left side of the rectangle slot cut: HB_Slot_Left = -36.2; //This is the Negative Number HB_Slot_Right = 24; //This is the Positive Number HB_Slot_Ht = 6; //Usually 6, but useful to change if printing Test bracket tops The peghole fill stl file I made with several tolerances from 0 to .3mm clearance. I then used the peg hole fill parts that fit the best in the 6x10mm peg holes. I initially made 3 holes on each side, but it seemed that 2 bolts were enough to hold it in place. In the openscad file for Oblong & Curved part, you only need to change the i3v variable to the version you are using. When installing this assembly, I would assemble the Left, Right Back Plates with the oblong & curved brackets before detaching your wooden plate. You might also want to install the motor on the plastic part before attaching it to the frame. After you take off your back wooden plate, install the peg hole inserts in the bottom peg holes on left & right side vertical wood frame. It was a little bit of effort to make this for all 3 versions. I have verified this as best I can, but I could have missed something. Let me know if you have any problems with these parts.