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| PeterE builds a 3d Printer |
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| Pete W.:
Hi there, Please forgive me if you know this but a wire finger guard has much less flow resistance than a panel of sheet metal with lots of holes, even if the unobstructed areas are the same. |
| PeterE:
Hi Pete W, No need to forgive, even if I did know. :beer: The effect comes from the wire profile itself. I am going to use chipenters idea and move the finger guard to the outside of the fram and at the same time secure the PSU to the frame wuth the guard screws. Will look neat and tidy. BR /Peter |
| PeterE:
Some work done to make a largish hole in one of the side triangles. I decided that the best side would be right under where I put the graphic display which means the left side seen from the front of the machine. A 120mm hole becomes quite big :zap: but we do want as good path for the air stream as possible. I added a strip of the same ply using both screws and glue to avoid geopardizing the structural stability of the diagonal side. Now I am at it to clean up the mess after making the hole. It also turned out that the screws that hold the finger guard also holds the fan itself in place so i decided to use only the two lower screws to secure the PSU to the fram. That should be good enough. Then one more little bit must be done before starting to clutter the machine up with cabling. A small bracket for the PTFE filament guide tube on top of the extruder. The base design is not made for such a thing, but I found a way to include it. Then there will be some days with sanding and painting to hide the worst mess-ups from hole making. /Peter |
| PeterE:
Since it is weekend I got some more done to the printer. The filler had dried nicely so on with the first coat of paint to hide the worst blemishes :-) The PSU is placed a bit from the board as the paint is wet. Now on to the smallish bracket for the holder for the PTFE-tube that willguide the filament to the feeder on the extruder. It looks like below when placed on its "back". Two tabs with M4 holes wil hold the bracket in place by using the long screws/threaded rod that will hold the pressure springs for the feeder. The tabs are pushed down into the nut pockets and then the bracket is placed flat and securely in place. Finally, the mount for the PTFE tube is screwed in place into the larger (1/8" NPT) hole and the filament is nicely guided straight into the feeder. Weekend job done! /Peter |
| PeterE:
Getting closer to the end of the mechanical and woodwork. The PSU is in its final place and secured with two stainless sheet metal screws 4.8x20mm through the side triangle and into the finger protection on the fan. Before fitting the PSU I added the cables I will need and for now leave the cable tail until the rest of the electronics is in place. The central unit - the Arduino - will get its place between the top of the PSU and the top of the portal. The picture shows more cables on their way. The set from the extruder and the ones from the stepper motors. I cannot do very much more before the Arduino is properly loaded and all applicable drivers installed which is the next step in the build. Well, apart from assembling the heated bed of course. /Peter |
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