Arduino Setup and Belts

[KH-Xavier]

Hello!

I am from the University of Alberta and we are excited to be building not only one, but several of these machines for research if the first one works. However, I am having some difficulty...

1. After much fiddling, Processor now will talk the Arduino (I believe), however, whenever I try to "Convert Model" I receive the error "ArrayIndexOutOfBoundsException:521216"

Also, after selecting the right COM, I receive "SD Initialization Failed." Does the SD card need to be hard-wired in before the program will work? I am trying to program the Arduino while I wait for parts to come in the mail...

1. Any suggestions on where to get the small belts for the gears? I can't find much smaller than 60 mm and some require 40-50 mm on the carriages.

Thanks!

[Pwdr]

Hi there,

Great to hear there is a lot of interest in the Pwdr project for
educational purposes! I'm pretty confident that together, we'll be able to
fix your problems.

1. Normally, it shouldn't bee too much of a hustle to get the serial
   communication. Maybe you can give me some details what you had to fiddle
   with? But back to your question. This error pops up more often, I'm still
   not sure what is the root cause, but it has to too with the STL file. Some
   files just don't work. This teapot (https://www.thingiverse.com/thing:852078)
   should work.
2. Yep, the SD card should be connected to the Arduino, at least to print
   something. You can still jog the axes when the SD Initialisation Failed
   pops up (well, I think so, have to check the source code)
3. I got my belts and pulleys from SPD-SI (http://www.sdp-si.com), as shown
   in the BOM, but there should be plenty of similar options around, for
   example McCaster-Carr (http://www.mcmaster.com/). You mention some measures
   (40-50mm and 60mm), but I'm not really sure what you mean, can you explain?

On Thu, Jun 25, 2015 at 9:52 PM, KH-Xavier notifications@github.com wrote:

Hello!

I am from the University of Alberta and we are excited to be building not
only one, but several of these machines for research if the first one
works. However, I am having some difficulty...

1. After much fiddling, Processor now will talk the Arduino (I
   believe), however, whenever I try to "Convert Model" I receive the error
   "ArrayIndexOutOfBoundsException:521216"

[image: image]
https://cloud.githubusercontent.com/assets/13054695/8364153/3eb2531e-1b41-11e5-9408-7ab0f89948aa.png

Also, after selecting the right COM, I receive "SD Initialization Failed."
Does the SD card need to be hard-wired in before the program will work? I
am trying to program the Arduino while I wait for parts to come in the
mail...

1. Any suggestions on where to get the small belts for the gears? I
   can't find much smaller than 60 mm and some require 40-50 mm on the
   carriages.

Thanks!

—
Reply to this email directly or view it on GitHub
#35.

[KH-Xavier]

Thanks for the quick response.

1. I changed the serial communication to the correct COM port (next time I am in the lab I can provide which lines I changed), but the Processing window allowed me to select Serial Any Idea behind the 1500W Power Supply?  #2 (COM6) with ease. However, I then received an "RXTX version mismatch" error, so a quick Google led me to

http://forum.processing.org/one/topic/how-do-i-install-rxtx-2-2pre1-jar-on-windows-7.html#25080000000981023.html

I followed the instructions and the error disappeared.

I will try to convert the teapot file when I'm in the lab and let you know if it works.

1. Great. Once the hardware arrives I will try to jog the axes without printing. I see an Eagle schematic, but is there an Eagle .brd file that is successful? I am trying to make my own PCB board for elegance, but I'm worried something will cross incorrectly and cause hours of frustration...
2. I ordered the belts from SDP-SI as per the BOM in the documentation, but I see that there is a huge belt that looks too large for the printer (2218mm)? In terms of the small belts, here's a screen shot of what I mean by the small belts.

I looked again and found small belts that will work.. guess I didn't look hard enough. I will order the correct sizes as I build the printer.

[Pwdr]

COM port behavior on windows is a bit quirky. I'll add some information
about the RXTX upgrade.

There is no .brd available. Currently there is a error in the schematics,
I'll update is asap. Could you share the design of the PCB when it's
finished?

The huge belt isn't used as such, it has to be cut to length and tensioned
using the clamping parts. The smallest belt should fit. The chassis has
slotted holes to make it fit.

On Friday, June 26, 2015, KH-Xavier notifications@github.com wrote:

Thanks for the quick response.

1. I changed the serial communication to the correct COM port (next
   time I am in the lab I can provide which lines I changed), but the
   Processing window allowed me to select Serial Any Idea behind the 1500W Power Supply?  #2
   Any Idea behind the 1500W Power Supply?  #2 (COM6) with ease.
   However, I then received an "RXTX version mismatch" error, so a quick
   Google led me to

http://forum.processing.org/one/topic/how-do-i-install-rxtx-2-2pre1-jar-on-windows-7.html#25080000000981023.html

I followed the instructions and the error disappeared.

I will try to convert the teapot file when I'm in the lab and let you know
if it works.

Great. Once the hardware arrives I will try to jog the axes without
printing. I see an Eagle schematic, but is there an Eagle .brd file that is
successful? I am trying to make my own PCB board for elegance, but I'm
worried something will cross incorrectly and cause hours of frustration...
2.

I ordered the belts from SDP-SI as per the BOM in the documentation,
but I see that there is a huge belt that looks too large for the printer
(2218mm)? In terms of the small belts, here's a screen shot of what I mean
by the small belts.

[image: image]
https://cloud.githubusercontent.com/assets/13054695/8382341/64ffac3e-1bef-11e5-9db4-5adb85e2b054.png

I looked again and found small belts that will work.. guess I didn't look
hard enough. I will order the correct sizes as I build the printer.

—
Reply to this email directly or view it on GitHub
#35 (comment).

[Pwdr]

The diagram has been updated!

On Sat, Jun 27, 2015 at 12:53 PM, Alex Budding alex.budding@gmail.com
wrote:

COM port behavior on windows is a bit quirky. I'll add some information
about the RXTX upgrade.

There is no .brd available. Currently there is a error in the schematics,
I'll update is asap. Could you share the design of the PCB when it's
finished?

The huge belt isn't used as such, it has to be cut to length and tensioned
using the clamping parts. The smallest belt should fit. The chassis has
slotted holes to make it fit.

On Friday, June 26, 2015, KH-Xavier notifications@github.com wrote:

Thanks for the quick response.

1. I changed the serial communication to the correct COM port (next
   time I am in the lab I can provide which lines I changed), but the
   Processing window allowed me to select Serial Any Idea behind the 1500W Power Supply?  #2
   Any Idea behind the 1500W Power Supply?  #2 (COM6) with ease.
   However, I then received an "RXTX version mismatch" error, so a quick
   Google led me to

http://forum.processing.org/one/topic/how-do-i-install-rxtx-2-2pre1-jar-on-windows-7.html#25080000000981023.html

I followed the instructions and the error disappeared.

I will try to convert the teapot file when I'm in the lab and let you
know if it works.

Great. Once the hardware arrives I will try to jog the axes without
printing. I see an Eagle schematic, but is there an Eagle .brd file that is
successful? I am trying to make my own PCB board for elegance, but I'm
worried something will cross incorrectly and cause hours of frustration...
2.

I ordered the belts from SDP-SI as per the BOM in the documentation,
but I see that there is a huge belt that looks too large for the printer
(2218mm)? In terms of the small belts, here's a screen shot of what I mean
by the small belts.

[image: image]
https://cloud.githubusercontent.com/assets/13054695/8382341/64ffac3e-1bef-11e5-9db4-5adb85e2b054.png

I looked again and found small belts that will work.. guess I didn't look
hard enough. I will order the correct sizes as I build the printer.

—
Reply to this email directly or view it on GitHub
#35 (comment)
.

[KH-Xavier]

Thanks for that.

It looks like the only change is the HP connector? Can you confirm that Output 5 of U6 is disconnected?

Also, as an aside, I understand the reset button, but what is the A0(RX) button for..?

[Pwdr]

No, that's not correct, thanks for checking out the complete diagram. This
is how the wiring should be. I've commited the update.

[image: Inline image 1]

The only change (prior this hickup) was in this area:

[image: Inline image 2]

On Sat, Jun 27, 2015 at 7:10 PM, Kevin notifications@github.com wrote:

Thanks for that.

It looks like the only change is the HP connector? Can you confirm that
Output 5 of U6 is disconnected?

[image: image]
https://cloud.githubusercontent.com/assets/13054695/8393098/2024fffa-1cbd-11e5-8ce8-7259dc13086d.png

—
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#35 (comment).

[KH-Xavier]

For some reason your images aren't showing. I'll work on a .brd from your new .sch file.

[KH-Xavier]

I made it to the lab today and as promised, this is what I changed in the code...

Under PWDR_GUI_V0_3.pde > Serial

String[] comList;
int selectPort;
boolean serialSet = false;
Serial arduinoSerial;

String serialString = "Choose the correct Arduino COM port...";

void startSerial(){
arduinoSerial = new Serial(this, "COM6", 9600);
arduinoSerial.bufferUntil(10);
serialSet = true;
serialString = "Serial port #"+selectPort+" connected";

The only thing I changed was to hard code "COM6", rather than selecting it.

I tried converting the Utah Teapot and it worked flawlessly.... I didn't bother trying to send the data because there are no electronics yet.

I will be uploading the .brd shortly.

[KH-Xavier]

Also, Boreaz published a different schematic for the HP Connector in Issue #22. What's the difference between that and the one you published a few days ago?

Which end of the connector is labelled 16? On my cable, two pins on the end are connected as below, which pin does this correspond to? Are they labelled 1 to 16 or 16 to 1?

[KH-Xavier]

Hi there,

I've been working on Pwdr again and the PCB has been hooked up, along with the motor drivers.

When I use the Processor program, it won't let me select the correct COM. I see the available COM ports, but when I click the box nothing happens. Even after I changed the code above, it still says Arduino not connected. This is with or without the PCB...

EDIT:

I noticed that selecting the wrong COM worked (processing would let me select COM 3, followed by crashing), so I disabled COM3 in the device manager. I'm not even sure what it was for. After I did that, I was able to select COM6 with a Serial Connection established.

[KH-Xavier]

Could I please get an update?

[Pwdr]

Sorry, I returned from vacation this week, your message was quite down the
large pile of to-do's.

Here is an image of the numbering on the ribbon, print head and catridge
holder:

I'm quite puzzled now about the schematics. Currently, I don't have
physical access to my Pwdr machine in order to check it. Maybe Boraz can
confirm his design works? Or maybe it might even be safer to check on the
old layout (
https://github.com/Pwdr/Pwdr-Model-0.1/blob/6084e1437b6733d2ed041ac12901771d7d181411/Electronics/Pwdr-Circuit-0.1.pdf
)

Concerning the COM issue: can you connect to the Arduino using a simple
Processing sketch? On what platform are you? Have you installed the RTRX
update?

Alex

​

On Thu, Aug 6, 2015 at 6:22 PM, Kevin notifications@github.com wrote:

Could I please get an update?

—
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#35 (comment).

[KH-Xavier]

No worries.. you're just my only savior at this point!

For some reason the image won't show.. can you hotlink it?

The COM issue has been sorted out. I can connect now... but now the Utah Teapot is giving me the Array Index Out of Bounds error... I'm going to try and get some coding colleagues to look at it if possible. I haven't touched the code and it was working before.

[Pwdr]

I fixed the image in my previous post.

I'm not 100% sure the teapot I linked does work, here is a link to the teapot I always use: http://wetterhorn.nl/teapot.stl

[Pwdr]

My schematics was based on this:

Coming from DYI Inkjet Printer (http://www.thingiverse.com/thing:8542)

But that doesn't match with the numbering of the ribbon cable. Vaguely, I remember the connector Conn_16_hp_q2347A to be the socket for the ribbon. So the numbering in the schematic should be like in the picture of the ribbon (NC/NC/COM/3/4/5/2/1/12/11/10/9/6/7/8)

Numbering from the right sight of the Darlington array goes from 1 to 16. Would you manage to put together the scheme? Otherwise, I'll try to arrange it in a few days.