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  • viewsat
  • viewsat
Today 02:01 - Today 02:02

LinuxCNC-RIO - RealtimeIO for LinuxCNC based on FPGA (ICE40 / ECP5)

Category: Computers and Hardware

I also obtained a Ricore ICEBreakerV1.0e circuit board, connected to the motor using the 26C31 differential output, but when I connected it to the cheaper DM542, a positioning error still occurred.
 
 
   
  • cakeslob
  • cakeslob
Today 01:54
dumb fight robot was created by cakeslob

dumb fight robot

Category: Show Your Stuff

spent the last year actually using my cnc, and not to make more cnc machines, my cousin kept asking me to do this fight robot league with her son in highschool, so we went to an event and it was pretty cool so we've been tryng to do it ever since.
its a 1lb weight class, so 454g. its pretty hard because everything is dumb, rc shit is dumb, the drone shit is dumb. i had to find the closest software thing to linuxcnc i could find but its still shit by comparison. i have to use all these dumb materials, and do so many operations and fixtures, i have to make dumb custom motors, and stupid rubber molds. i had to buy and use an M1.6 tap...
i learned how to anodize thought, and its pretty cool.

 but im having a good time, except i keep getting destroyed by teenagers with 3d printers


 
 
 
 

   

 
  • emresensoy
  • emresensoy
Today 00:58
Replied by emresensoy on topic DIY Robot Kinematic parameters,

DIY Robot Kinematic parameters,

Category: Advanced Configuration

NWE post=348703 userid=46071Looking at the drawing, it seems to be missing 1 degree of freedom. Is this intentional? Or am I overlooking something?
 

I forgot to mention. I'm calculating the 6th axis as a dummy axis.
  • viewsat
  • viewsat
Today 00:47 - Today 02:13

LinuxCNC-RIO - RealtimeIO for LinuxCNC based on FPGA (ICE40 / ECP5)

Category: Computers and Hardware

I used this inexpensive DM542 only for testing RioCore, not for an actual CNC machine tool. The circuit modifications are for technical discussion only, please don't mind. I'm showing four sets of drivers in the photos, but only this inexpensive DM542 has a problem, hence this discussion. Strangely, increasing the dirhold value doesn't solve the problem; I really can't understand this. However, this inexpensive DM542, when used with the same settings on a MESA7I92, shows no positioning error. This inexpensive DM542 was taken from my existing engraving machine for testing.
 I'm from Taipei, Taiwan
   
  • PCW
  • PCW's Avatar
Today 22:35
Replied by PCW on topic Frage zu 7I96?

Frage zu 7I96?

Category: Deutsch

.bit is correct for 7I96

(.bin is for 7I96S)
 
  • rodw
  • rodw's Avatar
Today 22:33

How do i know if my EtherCat Install is right

Category: EtherCAT

If ethercat reports your six slaves, its properly installed. The next step is to build a xml file which lcec_configgen does the heavy lifting for and then configure then move on to the ini and hal files.
  • Holzwurm56
  • Holzwurm56
Today 21:19
Replied by Holzwurm56 on topic Frage zu 7I96?

Frage zu 7I96?

Category: Deutsch

Hallo PCW,
du hast geschrieben:
"If you have a 7I96, it can support up to 4 MPG encoders directly on the isolated inputs
with the right firmware ( 7i96_inmd.bin )"
Was ist der Unterschied zwischen 7i96_inmd.bit und 7i96_inmd.bin? Wichtig sind für mich 2 Achsenencoder
und ein Spindelencoder.
MfG
Hans
  • PCW
  • PCW's Avatar
Today 19:28
Replied by PCW on topic Frage zu 7I96?

Frage zu 7I96?

Category: Deutsch

You can simply update the firmware to what you need with mesaflash.

say:

mesaflash --device 7i96 --addr [card_ip_address] --write 7i96_inmd.bit --reload

Where 7i96_inmd.bit comes from 7i96.zip and [card_ip_address]  is either 192.168.1.121
or 10.10.10.10 depending on the 7I96 jumpering.


www.mesanet.com/software/parallel/7i96.zip

 
  • Holzwurm56
  • Holzwurm56
Today 19:06
Replied by Holzwurm56 on topic Frage zu 7I96?

Frage zu 7I96?

Category: Deutsch

Hallo PCW,
ich habe die 7I96 vor ein paar Jahren gekauft. Wie kann ich feststellen ob die Firmware 7I96_inmd.bin installiert ist? Oder
ob da eine ältere oder andere installiert ist?
  • PCW
  • PCW's Avatar
Today 18:25

LinuxCNC-RIO - RealtimeIO for LinuxCNC based on FPGA (ICE40 / ECP5)

Category: Computers and Hardware

PC817 is a strange chip that works in a strange way.
First of all, it is an analog circuit, not a digital one.
Secondly, the input is controlled by current, not voltage, and the output forces current, not voltage.
In addition, the frequency response strongly depends on the input current, a small current means a small propagation time, but also a small output current.


Not really strange at all, almost all transistor/Darlington output optocouplers function this way
and this type optocoupler is by far the most common.

Logic optocouplers also typically have current inputs (since the input  of most optocouplers   is simply a bare LED)
but differ in having a voltage output.
 
  • Aciera
  • Aciera's Avatar
Today 17:22
Replied by Aciera on topic DIY Robot Kinematic parameters,

DIY Robot Kinematic parameters,

Category: Advanced Configuration

As NWE has already commented, 'genserkins' assumes 6 axes (yours seems to be missing the forearm twist).
There is a kinematic in linuxcnc for a 'scorbot er3' which looks like it might be adaptable for your case:
github.com/LinuxCNC/linuxcnc/blob/master...atics/scorbot-kins.c
  • nhof
  • nhof
Today 16:49
Replied by nhof on topic Beckhoff EL2522 lcec xml file

Beckhoff EL2522 lcec xml file

Category: EtherCAT

Hello emresensoy, I recently wrote a driver for EL2522 which is available since linuxcnc-ethercat v1.41.2.

It supports Continuous Position (CSP-like) mode currently, as seen here: github.com/linuxcnc-ethercat/linuxcnc-et...ster/examples/el2522

I hope you will find this useful, please let me know if you try the driver and encounter any problem, as I may be able to assist. Thanks.
  • tuxcnc
  • tuxcnc
Today 16:39

LinuxCNC-RIO - RealtimeIO for LinuxCNC based on FPGA (ICE40 / ECP5)

Category: Computers and Hardware

I have never written anywhere that I forbid anyone to do anything.
I wrote that modifying Chinese electronics is a bad idea, which is true for several reasons.
Cheap PCBs do not tolerate re-soldering very well, the copper peels off from the substrate, even if something works well immediately after such an operation, there is no guarantee that it will work after a month or a year.
Is there any prohibition against writing about it?


PC817 is a strange chip that works in a strange way.
First of all, it is an analog circuit, not a digital one.
Secondly, the input is controlled by current, not voltage, and the output forces current, not voltage.
In addition, the frequency response strongly depends on the input current, a small current means a small propagation time, but also a small output current.
The chip can work really fast (several dozen kilohertz), but then it may not drive the next stage with a small current.
However, when driven by high current, it may have problems already at a few kHz.
There must always be some compromise, assuming that the designer knew what he was doing and did not assume that if the PC817 withstands 50 mA, 20 will be fine...
  • hughcustoms
  • hughcustoms
Today 15:41

How do i know if my EtherCat Install is right

Category: EtherCAT

Hi All so i have a question
so how do i know if my Ethercat install is successful, I check the Master is active the Slaves are there
I now need to do the HAL files and config xml 
i have this not sure if it is correct
i have 6 servo motors , 
  • NWE
  • NWE's Avatar
Today 15:21
Replied by NWE on topic DIY Robot Kinematic parameters,

DIY Robot Kinematic parameters,

Category: Advanced Configuration

Looking at the drawing, it seems to be missing 1 degree of freedom. Is this intentional? Or am I overlooking something?
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