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"GinaRep Giant Mk 4" 3D Printer



I'm starting this Blog as I have decided to resurrect my Giant 3D Printer project sometime in the relatively near future.  From building other printers I have gained extra knowledge and may have a plan.  This will be based on both the Mk.2 and Mk.3 Giant printer designs plus my Concorde 3D Printer for the Z drive system.  The main casing has yet to be decided.  The print bed will be moving to provide the Z axis, having thought long and hard about a moving XY frame as in the Mk.2 and rejected it.  The Z drive will move the print bed as in Concorde printer with trapezoidal form threaded rods and C-Beam Linear Rail – Cut To Size with C-Beam Double Gantry Plates.


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Posted (edited)

The print bed will be from previous Giant printers - 500mm x 500mm x 5mm aluminium plate with mains voltage silicone heater pad underneath.  I want to make this latest version of the printer capable of covering the whole of the print bed if possible.  The bed will be supported by a plywood sheet itself supported by an aluminium extrusion frame attached to the C-Beam double gantry plates.  Between bed and plywood I plan to have 12mm thick PU foam for insulation and to ensure the heater pad is touching the aluminium plate (the glue has given up in the central region).  The C-Beam will be 1000mm giving a printing height of just over 800mm.  NEMA23 stepper motors will provide the drive.

Amazingly, I have found a PEI sheet big enough for my Giant print bed :-  PrimaFil PEI Ultem sheet 500x500mm-0.2 mm  and with the pound dropping fast against the Euro I've decided to get it now.  It can go on the aluminium print bed to provide a better printing surface than plain aluminium while cutting out the glass plate will greatly reduce the weight.

Edited by Gina

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I look forward to seeing how this goes. I have a Sidewinder X1 and the AC bed is reall good.

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