Show all posts by user
I posted a resonse while I was at work from my phone so it didn't get posted.
Yeah, I realized when I started speaking that it should have gone into the beginning.
My camera is not the greatest, not much I can do about that but suggest you turn up the volume.
The Y axis will stay as is in its orientation because of the single rod, and that if I did flip it, it would cause endless headaches, a
by
Grogyan
-
General
Here you are.
Part 1
Part 2
I hope I got everything, if not, just ask, I know its hard to understand my accent.
Too late tonight, but i'll publish this on my blog tomorrow
by
Grogyan
-
General
What I can do is do a little video tour explaining all the aspects of the project.
That will be tonights job when I get home from work.
by
Grogyan
-
General
My RepStrap is using two old flatbed scanners fot he x and Y axes, though i've ripped out the drive electronics as they weren't going to be compatible.
One opto endstop is used the other one was on the drive trian and have since removed it in place of a microswitch on the body of the scanner.
Custom Z axis mostly made using slide rails used for drawers, using an M6 threaded rod for moving up and
by
Grogyan
-
General
Thanks, thats what I did wrong, no end stops.
I knew it was something so simple.
by
Grogyan
-
Controllers
I am having a serious problem with my Gen 3 electronics.
All my steppers will only drive forwards when jogged in the RepRap host.
When I reverse the direction and jog a stepper driver backwards (any number above zero), nothing happens.
I have tested the Dir pin, and it is being held low to indicate backwards movement, and high when driven forwards.
I have also used simple G-Code that just drive
by
Grogyan
-
Controllers
To get belts and pulleys here in New Zealand, your best chance is to actually as a local transmission specialist, eg Saeco Bearings, they will import them in for you.
Though not really a good idea to buy bearings in this country, as I asked Saeco, and they were going to be hideously expensive, this site VXB bearings should have all the bearings you would need, just choose a non express method, a
by
Grogyan
-
New Zealand RepRap User Group
115200 IS too fast, drop it to 19200 if you can. I had the same problem, but with windows.
following the method in the first post got it working for me, first time, under Ubuntu 9.10
No mention of the setup was on the wiki, that has now been fixed.
by
Grogyan
-
RepRap Host
Try asking a local CNC company where they get their drill bits from.
by
Grogyan
-
General
Belts in New Zealand are imported upon request, and very little is held in stock in the country. This is what I have found with asking around.
Electronics from MindKits for a RepRap is something I got to ask last night at the Arduino group meeting. Essentially it will be all the parts that are supplied by either SparkFun and Arduino.
More will be shown come mid April
by
Grogyan
-
New Zealand RepRap User Group
Just use typical 0.1" (2.54mm) header pins, some of these are designed for wire wrapping, if you can get them, otherwise regular header pins will work fine.
Downside of this tech is that everything will most likely be through hole instead of SMT.
Wire wrapping just uses a stripped end of #32 AWG Kynar sheathed wire, that is then threaded into a wire wrapping tool, place the tool over the header
by
Grogyan
-
Wire and Thread Embedded Extrusion
Will look into that.
Still i'm interested in hearing from everyone the pros and cons for such a system as a consideration for integrating replicatable electronics into the RepRap, which is based on the old technology of autonomous wire wrapping
I'm relatively new to these forums, though i've have known about RepRap since late 2007 (newspaper article)
by
Grogyan
-
Wire and Thread Embedded Extrusion
No one has mentioned an age old technique of autonomous wire wrapping.
This was a favored method of early prototyping circuits.
Same method can be applied here.
Pcb you would use is veroboard/stripboard or perfboard, all these options are really, really easy to get a hold of.
Debate and discuss?
by
Grogyan
-
Wire and Thread Embedded Extrusion
I'm building a RepStrap, even though Vik and Tim don't live too far from where I live. Building the robot chassis as a personal robotics project.
When its idle, it will be producing parts to help Tim out, as well as parts for my Mendel
by
Grogyan
-
New Zealand RepRap User Group
Before there was MakerBot, there was McWire and the ReRap host, and lots of people are still using a McWire with the RepRap host, so it shouldn't be difficult.
Even though my RepStrap uses belts, i'm using the RepRap host for controlling the electronics
by
Grogyan
-
RepRap Host
RC servos are not very good at absolute positioning, that and the fact that you would need to constantly give them a pulse train of 50/50 PWm for them to stay still is also another thing to consider.
There are however proper closed circuit servos used in robotics, these may be of use, but RC servos are definitely not useful.
by
Grogyan
-
Mechanics
i had the same problem with the makerbot electronics.
There are two further wires to connect from the extruder board to the motherboard.
On the motherboard its two wires that would be used for I2C but are instead are simple step and dir for the extruder board
by
Grogyan
-
Reprappers
Thanks to Giles, it works for me somewhat in Linux.
This isn't my main OS, and i've got running right now
Ubuntu 9.1 64bit.
Just wondering if I have to down grade the Java version on this OS to 5.21, and how to go about that?
The error message I have is
DEBUG: The distribution preferences file contains:
Extruder0_Purge(ms)
Extruder0_ExtrusionPWM(0..1)
Extruder2_Purge(ms)
Extruder1_Extru
by
Grogyan
-
RepRap Host
update.
Using the lynxmotion terminal program, found the right baud, and managed to change it to 9600.
HyperTerminal was able to communicate after changing the baud, though I still cannot change the baud using the "configure" button, the only way to do that is in the control panel.
Serial comms is now working with the host, will have to double check that tonight when I get home from work.
Now
by
Grogyan
-
RepRap Host
Just read the Arduino forums, looks like none has posted a problem like I have.
Thanks Nophead, but I think its still possible to have a bluetooth connection/
Its late and i'm not getting anywhere, so if anyone else has an idea why I cannot get the thing to even say "ok" in HyperTerminal please let me know. In HyperTerminal I cannot set the baud of the device.
by
Grogyan
-
RepRap Host
I talked once with Vik, and there was a time, long a go, where Bluetooth was an optional communication medium.
i've spent the day, and still searching, and I think I have tracked the problem down to HyperTerminal, just trying to do simple commands, not dealing RepRap host at the moment.
Cause in the documentation, when the bluetooth device is setup, HyperTerminal should say "OK" to say it has b
by
Grogyan
-
RepRap Host
In short, I can only do debugging with a cable as it hangs over an access way, and i'll be needing the RepRap that i'm building to run over a wireless communication device.
I have chosen and bought, and correctly wired up a BlueSMiRF
I'm trying to get the BlueSMiRF to communicate properly with the latest release RepRap host software (2009 08 04).
So far I have not been able to get any comms ov
by
Grogyan
-
RepRap Host
I modified the motherboard, by using a wire from the 5VSB on the ICSP to the VCC pin on the header connector.
I alo made up a cable as the pinout of the BlueSMiRF is a little different to the Arduino.
Once it was all hooked up, it worked perfectly.
Definitely a mode of communication for anyone to consider for distances further than 2m.
I have not tested the comms yet with a steppers attached.
by
Grogyan
-
Controllers
I'm going to try and start using the Blue SMiRF for the comms channel, as I have had problems with USB comms and the fact that the USB cable dangles across an access way .
Just wondering if anyone else here have tried using this device?
by
Grogyan
-
Controllers
Do not plug in the power supply if you are programming the bootloader, or you may blow up the chip.
Out of curiosity, what are you using for your USB programmer?
I am using a sparkfun RS232RL breakout board, and its not causing any problems.
by
Grogyan
-
Controllers
Short answer is yes.
The new Gen4 electronics coming to makerbot uses the Atmega 1280.
You can also use an ordinary arduino for everything, firmware in under darwin I believe in SVN
by
Grogyan
-
Controllers
I had thought of having a jig printed that you give out with the rest of the parts, whereby you just use a simple drill press to drill each of the pieces.
A lathe is hard to come by, harder to find one that you are allowed to use, but a drill press is very easy to come by and use.
The tough part is acquiring a 0.5mm or smaller drill bit for the nozzle, and centre
by
Grogyan
-
Kartik M. Gada Humanitarian Innovation Prize
Airsoft balls are available in New Zealand, however I don't trust that they will be robust enough to last.
It may be an idea to come up with a design that doesn't need bearings at all.
From the demo videos that Ed posted, it tends to make the printer a lot more noisy
by
Grogyan
-
Kartik M. Gada Humanitarian Innovation Prize
Has anyone tried making a polybot, or prepared to make a polybot?
I saw this, and looking at the pictures of the plastic bits, it should be possible to print them out on a RepRap.
by
Grogyan
-
Robots!
