will1384's Ord Bot Hadron

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Re: will1384's Ord Bot Hadron

Postby will1384 » Thu Apr 24, 2014 3:54 am

I was having retraction problems so I decided to try a different extruder, I printed this out just as a test

http://www.thingiverse.com/thing:60531

and used this to make the hobbed bolt

http://www.thingiverse.com/thing:15210

I had picked this extruder thinking I would mount to the makerslide, but I could never find a good place, so I used some furniture braces, one flat corner brace and one flat brace.

Image

Image

Image

I like this type of extruder, it seems to do much better.

I had another problem pop up, just after I moved my Ord Bot to another desk, I was seeing some of my prints shift to the left during the print, always to the left, and it only affected a few prints, most were just fine, I sit and watched it print and caught it just suddenly moving over and printing were it should not, it moved under power to the wrong location, I had the Ord Bot connected to the computer threw a powered USB hub and an active USB extension cable, and I believe that was the problem, I moved to computer closer and used a short USB cable to fix the problem.
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Re: will1384's Ord Bot Hadron

Postby madmike8 » Thu Apr 24, 2014 3:13 pm

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Re: will1384's Ord Bot Hadron

Postby madmike8 » Sat Apr 26, 2014 8:33 pm

I just wanted to say thanks. Got my first prints from my Hadron last night, and your thread helped make that happen. Thanks for documenting your build so well.
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Re: will1384's Ord Bot Hadron

Postby will1384 » Sun Apr 27, 2014 4:21 am

madmike8 wrote:I just wanted to say thanks. Got my first prints from my Hadron last night, and your thread helped make that happen. Thanks for documenting your build so well.


I am glad I could help :)

madmike8 wrote:Have you looked at this?

https://plus.google.com/+Whosawhatsis/posts/TY6XCPDqBKU


I will look into that.

I am still having problems, with the prints messing up, I now know its ether the computer or software, and here is how I know, long story :lol:

-------------------------------------------------------------

I had wanted to try printing with Bluetooth, so I got this

http://www.amazon.com/gp/product/B0093XAV4U

its a cheap $11 Arduino Bluetooth module, the one I got in the mail was a JY-MCU v1.06, and I was unable connect when attached to a USB TTL Serial cable, I used the TTL-232R-3V3 listed on this page:

http://www.ftdichip.com/Products/Cables/USBTTLSerial.htm

and tried to connect with HyperTerminal in Windows, but it never connected, and would never reply to commands, so I looked on the Internet and found this

http://mcuoneclipse.com/2014/03/30/getting-bluetooth-working-with-jy-mcu-bt_board-v1-06/

the v1.06 version of the JY-MCU Bluetooth module has a diode on the TxD line, and that blocks the connection, so I bypassed it with a jumper, then followed the directions here

http://reprap.org/wiki/RAMPS_1.4#BT_Extension

You type the commands into HyperTerminal or other terminal emulator, you may have to copy then paste the commands into HyperTerminal.

Code: Select all
AT
AT+BAUD8
AT+NAMEORDBOT
AT+PIN0000


and it responds with
Code: Select all
OK
OK115200BAUD
OKsetname
OKsetPIN


The command AT+NAME is optional, and the command AT+PIN is optional, I believe the default pin is 1234.

After I finished configuring the JY-MCU Bluetooth module I then installed a Logic Level Converter converter I got from

https://www.sparkfun.com/products/11978

I did this because the Arduino Mega UART communicates using 5V but the JY-MCU Bluetooth module communicates using 3.3V.

It looks like Sparkfun no longer sells the Logic Level Converter converter I used but this might work

https://www.sparkfun.com/products/12009

Image

Now cover any exposed places on the Bluetooth module and Logic Level Converter with heat shrink or electrical tape, then you set software to use one of the COM ports that was created by the Bluetooth connection and it should work, I used Cura to print with and it did work.

BTW to update the firmware you still need to use a USB cable.

-------------------------------------------------------------

I still had some prints mess when using Bluetooth just like when using USB, so I thought maybe the stepper drivers are getting hot, so I printed this up

http://www.thingiverse.com/thing:153849

Image

but it did not help.

-------------------------------------------------------------

I even upgraded the power supply with this

http://www.amazon.com/gp/product/B00D7CWSCG

and used this to attach the power supply to the makerslide

http://www.thingiverse.com/thing:50775

just make sure not to block the fan, also make sure the M4 screws you use with the clips you printed out are not to long.

Image

I did not honestly think the power supply was the problem, but I wanted to replace the modified ATX, it looks better, makes it easier to move, and when using a In Line Cord Switch makes it easy to turn OFF/ON

I also printed this, I think, to cover the power supply terminals

http://www.thingiverse.com/thing:113525


my prints still messed up,
-------------------------------------------------------------

So next I tried printing with the SD Card, and it printed perfect, so I tried a few more prints with the SD Card, and they all print perfect, next I will try a different computer and see it that works.
Last edited by will1384 on Mon Apr 28, 2014 3:42 am, edited 1 time in total.
will1384
 
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Re: will1384's Ord Bot Hadron

Postby madmike8 » Sun Apr 27, 2014 5:46 am

Set your baud rate in Marlin to 250000.
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Re: will1384's Ord Bot Hadron

Postby will1384 » Sun Apr 27, 2014 6:51 am

madmike8 wrote:Set your baud rate in Marlin to 250000.


Thanks for the suggestion, I will try it tomorrow, I have it set to 115200 now, and it was working for a long time like that, but for some reason it just decided to go crazy, I have watched it mess up a few times now, and it prints straight lines pretty good when it messes up other than one or two random direction shifts, but it makes grinding and shuddering sounds when doing circular shapes, I had thought it was the Anti-virus, but I removed AVG and installed Avast, and disabled them with no change, its an older computer, 2.8GHz P4 CPU, 2.5GB Memory, WinXP, but its only used for CNC and 3D printing, no other programs are running when I am trying to print, and I don't have any unnecessary startup programs ether, I have LinuxCNC installed on the same computer in a dual boot setup, so I may try getting Cura to run under Linux.
will1384
 
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Re: will1384's Ord Bot Hadron

Postby madmike8 » Sun Apr 27, 2014 7:07 am

Marlin switched to 250000 baud by default as it solved problems with jitters and errors. WinXP might not support 250000 by default... So, you might want to check this out...

http://northernhope.blogspot.com/2012/08/marlin-re-upgrade-250000-baud.html
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Re: will1384's Ord Bot Hadron

Postby will1384 » Sun Apr 27, 2014 10:25 pm

madmike8 wrote:Marlin switched to 250000 baud by default as it solved problems with jitters and errors. WinXP might not support 250000 by default... So, you might want to check this out...

http://northernhope.blogspot.com/2012/08/marlin-re-upgrade-250000-baud.html



Yep, thanks, I set the baud rate in firmware to 250000 and Cura connected to it over USB without problems, and without any modifications to Windows XP, but I did run into a problem with the Bluetooth module, the fastest my Bluetooth module will go is 230400, and I found this discussion that talks about the difference between 250000 and 230400

https://github.com/ErikZalm/Marlin/issues/205

apparently 250000 has less errors , so I will likely stick with USB for now.
will1384
 
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Re: will1384's Ord Bot Hadron

Postby madmike8 » Sun Apr 27, 2014 11:09 pm

Hopefully it solves your printing problems.

I honestly haven't looked at the BT stuff yet, but can you transfer the file to the SD card through the BT and then print from the SD as an option to print wirelessly?
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Re: will1384's Ord Bot Hadron

Postby will1384 » Mon Apr 28, 2014 3:40 am

madmike8 wrote:Hopefully it solves your printing problems.

I honestly haven't looked at the BT stuff yet, but can you transfer the file to the SD card through the BT and then print from the SD as an option to print wirelessly?


I think it might be to slow to transfer larger files.

I wonder if the firmware of the JY-MCU Bluetooth module can be modified to give it the 250000 baud rate, I found this page but not sure how helpful it would be for this

http://byron76.blogspot.com/

and this info page on the Bluetooth modules

http://wiki.pinguino.cc/index.php/SPP_Bluetooth_Modules

I will look into modifying the firmware of the JY-MCU Bluetooth module later when I have some more time.

I made an interesting discovery, with the modified ATX power supply, and the USB cable attached to the RepRap/Arduino, the LCD would stay on with the ATX power supply turned off, but with the new power supply everything shuts down, next time I use a modified ATX power supply I will install a real off switch and not use the one already installed.

I found a small squirrel cage fan that weighed about the same as the fan and duct I was using before, and gave it a try

Image

Image

it blows a huge amount of air for its size, and seems to help my prints more than the smaller fan.
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