Makerbot says it's on their internal Wiki at the moment so who knows?by richrap - Next Wave Electronics Working Group
Just a quick update as I re-started this print (By hacking 27 layers out of the GCode) and it all worked ! even with a bit of warp! So I now have a cool 3D Bearing - See my blue line - And it rotated 180 degrees - I tried printing one 50% smaller, but that was a failure, I expect 200% would work great!by richrap - General
The new Makerbot Thing-o-matic has the Gen4 Electronics, so we may find out more about them shortly. But from what was posted by Makerbot they sound very similar to the Gen6 done by Mendel-parts -by richrap - Next Wave Electronics Working Group
I was just asked this question, so - I should have provided a few links to these - I got mine from Zapp Automation - I may try this company next time I need some - And this one on Ebay is 20mm - They are known as 'round rail mounts' or as the ebay one 'spindle motor mount' Let me know if you use one or find another use for one - I am thinking about using one as the start of a hot-end Hby richrap - Plastic Extruder Working Group
I Just thought I would put up a few photos showing my first basic extruder, it's working very well and I have used off-the shelf Aluminium 16mm clamps, this method may be of some use to you if you are thinking about making a Repstrap or if you think you need a bit more cooling on your hot-end! You can get these from many places for just a few pounds each (£1.50, $2, 2Euro). These both hold itby richrap - Plastic Extruder Working Group
That's a mean bit of kit. Very nice design, just what I was looking for, thanks.by richrap - General
Has anyone tried multiple toothed driven wheels? say from a number of gears or a long worm screw for the main transmission? I did wonder if you could use both ends of a dual output stepper motor to drive the filament at two points to increase force? You don't want one driving and one slipping, that would get messy. I know BFB uses a threaded rod for the feed, but I can't imagine that's much betby richrap - General
Thanks again Bob, I'm going to give it a try. The GCode page was also a great help, it even helped me solve another issue/question I had with my Repstrap - (pause time before print - in the Firmware) Cheers, RichRapby richrap - General
So maybe a bit over ambitious for a Repstrap with no Heated bed but I had a go anyway. I really like the UP! Bearing - get it here - http://www.thingiverse.com/thing:3981 Not a bad start - Poor choice of infill size - too many start-stop operations Starting to warp on the front edge - Note my use of double sided tape! in an attempt to counter the warp. At this point the warp was going to desby richrap - General
Thanks Bob. And I just spotted a bug-update from Adrian on the Reprap Release notes for rev 3792 - Author: adrian-bowyer Date: Tue Sep 14 17:30:13 2010 UTC (5 days, 21 hours ago) Changed paths: 1 Log Message: Interlayer cooling and re-zeroing bugs fixed (I hope...) So maybe it was a real re-zeroing bug, and maybe fixed in the next release. I'm still going to learn about Gcode now, it'by richrap - RepRap Host
I have a half printed object and I would really like to be able to carry on from where it stopped printing. Can I edit the GCODE file to remove say the first 27 layers and carry on printing the rest? I know exactly where it stopped and it was at the end of a complete layer. I'm using Reprap Host (Yes I know). Do I need to have a call to make my Z axis get to the correct level, what would thisby richrap - General
Hi Bob I expected that! I am trying to follow (for better or worse) the official Reprap wiki route just to see how hard it is for someone new to get up-to-speed using the tools Adrian and (some of) the official developer team uses, it's a bit harder then I expected but all going remarkably well really. So far it's not been easy for a my Repstrap to conform to looking like a Mendel, but I am geby richrap - RepRap Host
Quick update - I'm starting to understand Reprap Host, but it's still not doing what I expect from the settings, maybe some bugs? Or I just don't fully know what I'm doing yet! I have printed some test cubes - And a few frogs today, it's getting better every print now I have turned the wiper shield back on, see the difference with "compare the frog" on my blog - I'm going to try printinby richrap - Reprappers
Hi Viktor Thanks for the update, My Repstrap is running now and getting encouraging results, I have started switching over to my own makeshift electronics, The original Gen3 Extruder board is now completely designed out of my system, I hope to get some more details of alternative electronics posted shortly. I hope you have all your electronics working now. RichRapby richrap - Controllers
I have been working hard getting Reprap Host working with my Repstrap, it's getting easier but I have one problem I just can't seem to resolve - I have disabled all settings (like interlayer cooling etc.) that make Reprap Host reset back to the 0,0,0 point after each layer, but it still does this every time. Does anyone know how to make it not do this, and just do each layer one after anotherby richrap - RepRap Host
I personally liked the earlier design - motor vertically and using the worm gear, nice slim tall package. What was wrong with the worm gear?by richrap - Plastic Extruder Working Group
Hi Thorp If eventually you made this a single extruder unit but with the ability to bolt 2 or 3 together I would be very interesting in buying some if you can get the price down to a resonable level.by richrap - Plastic Extruder Working Group
Traumflug, t3kboi - I'm no expert yet but at the start of Calibrating my Repstrap was fine when just jogging 10mm, but when I tried to Home it, then it started to use Acceleration and was not at all happy. So for my setup (and I expect many Repstraps/Junkstraps) I would recomend setting this to constant speed in the main Firmware, then you can tune it to your setup in Reprap host - You need tby richrap - RepRap Host
Just a quick update on this - I just spotted comments in Reprap DEV about Analogue Ground not being connected, this was exactly the problem I had with the above. The GRRF Extruder board WILL work without Analogue ground connected, but will give very odd (but still consistent) ADC measurements. Driving the onboard stepper will not work as it totally messes up the POT reading. Spent a good fewby richrap - Controllers
You may also need to turn off Accelerations, many repstraps don't like it enabledby richrap - RepRap Host
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 positionby richrap - Reprappers
Just spotted Makerbot now have a automatic build platform - http://www.thingiverse.com/thing:4056by richrap - Kartik M. Gada Humanitarian Innovation Prize
I will give it a try, but I may just end up with low accuracy at the high temperatures end. I'll mess about with it and try to just focus the table on being accurate at around 240 Deg C.by richrap - Controllers
Hi Nophead, thanks for checking my problem. it's bonkers ! I just can't see what else could be wrong? I have tested and downloaded a few different tables and can see them making a difference to the readings and also added bits of debug code to check It's downloading correctly so I can only imagine the ADC has some sort of internal problem? I have also checked that it's a nice 5V supply so theby richrap - Controllers
So I think I have just one more thing to resolve then I can start to try printing with my repstrap - I'm using the Gen3 electronics (5D Firmware) and have an issue getting the correct temperature reading in Reprap host from the Extruder board. I'm using an EPOCS B57560G104F -Thermistor I tried this thermistor lookup on the Wiki, but it didn't read correctly after about 140 deg C and higher -by richrap - Controllers
Hello Peter, I expect It's one or more of these three problems - 1 ) - Make sure you have the POT turned to about half way for testing. 2) - You need to have the Opto MIN board connected, or that tells the mainboard not to move the motor as it thinks you are at the end of travel. 3) - Or (More likely) - The GRRF stepper boards have a problem with component C2, a 1000nF capacitor has been fiby richrap - Controllers
For what it’s worth from a newcomer I may as well chip-in. If you only want to print things without hastle then maybe buying something in a kit or completed is what you need. But after you have printed some things with your off-the-shelf printer what are you going to do with it? Probably feel annoyed when the next model comes out. I think the Reprap Wiki does a very good job of showing just whatby richrap - General
The Gen6 looks similar to a Gen3 respin I have in the works designed for beginners to get started with Repstraps and Raphacks easily. The Gen6 YouTube video shows a nice setup, minimal wiring, single board. it looks similar to a combined Gen3 setup having 4 x stepper drivers integrated, and it looks like they have also integrated the extruder functions into the main Micro which is sensible. Theby richrap - Reprappers
OK, Just found a mention about "serialpassthrough" driver for 'GCode Interpreter' but the link takes me to the Generation 2 hardware? Will this work with Gen3 and 5D FW? Am I getting closer... or barking up the wrong tree? I won't be able to test it again until later.by richrap - General
So after a bit of debugging I have my Electronics and motors all working well with Reprap host software and 5D firmwares. But I can't get ReplicatorG Version 0018 to work with the same 5D firmware as Reprap Host? Is this just not possible?, I don't need to run it but I would like know before I start attaching everything to my Repstrap, can anyone point me in the right direction. Also does anyonby richrap - General