This is going to look the wrong way around as this first Blog entry documents some initial printing success with my home-made RepStrap printer (a Repstrap is a lashed together 3D printer with the aim to print enough parts to make a real Reprap printer) - See - http://www.reprap.org/wiki/Main_Page
So here we go -
Very late on Sunday I got my Repstrap to print. Here are some photos from its very first go.
I had the nozzle/bed clearance calibrated with sheets of paper as I don’t have easy adjustment yet and in my excitement I didn’t do a test-run so I was slightly alarmed when the nozzle moved down at the start into my Polycarbonate build surface, I should have remembered that Mendel has it’s zero position just off to the side of the build-bed!
I then thought it was not working after waiting a long time at the dump position, by that point I was very tired and about to turn it all off… then movement!
Here is what I ended up with about 10mins later –
I think some of the discoloration is due to excess material from where one wall snapped off (removed that bit), but after a while the spare material started making a bit of a mess so I stopped it and went to bed.
It also seems quite fused to the PC bed, so maybe the bottom layer was a bit to close, maybe melted into the PC?
Registration looks ok, no missed steps?
Microscope close-up looks like the walls are well fused?
Do you think enough material is being extruded? Or too much?
Reprap Host Software - http://www.reprap.org/wiki/Installing_RepRap_on_your_computer
Extruder hot-end - Hybrid PEEK/PTFE from Brian (http://forums.reprap.org/read.php?1,36084) ,really glad I bought this bit, works well.
Extruder drive – Not geared, loosely based on a basic 8mm direct-pinch drive grip – NEMA17.
Accelerations - OFF
Natural ABS – set to 243 Deg C.
3mm Polycarb bed and 18mm MDF.
OK, If you are not very impressed with the above effort, this is what it should have looked like -
I’m going to try to refine and calibrate it now, so any suggestions welcome, I then need to print a Geared extruder!