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  • vmihalca
  • vmihalca
08 Oct 2024 17:08

Mesa 7i95T - full closed loop with linear scales and delta asda A2 servos

Category: Basic Configuration

I am getting warnings that my stepgen.00.maxvel is too big for current step timing and position scale, clipping to max possible.
The same I get for stepgen.01

For now I unlinked the feedback from the encoders, so I get the position feedback from stepgen. The direction of movement is correct, but its slow and I get following errors
  • PCW
  • PCW's Avatar
08 Oct 2024 16:55

Mesa 7i95T - full closed loop with linear scales and delta asda A2 servos

Category: Basic Configuration

That will only work is the step/mm and encoder counts/mm = 4000
(and you get the directions right)
  • vmihalca
  • vmihalca
08 Oct 2024 16:51

Mesa 7i95T - full closed loop with linear scales and delta asda A2 servos

Category: Basic Configuration

I have set both of them, but now they are set to the same value, if we just talk about the Z axis, its 4000
  • PCW
  • PCW's Avatar
08 Oct 2024 16:46 - 08 Oct 2024 16:46

Mesa 7i95T - full closed loop with linear scales and delta asda A2 servos

Category: Basic Configuration

You do need to set both the stepgen scale and encoder scale so they
are commensurate (the steps/mm stepgen scale and counts/mm encoder scale
match the physical device scales). If not, you will get massive following errors.
 
  • vmihalca
  • vmihalca
08 Oct 2024 16:37

Mesa 7i95T - full closed loop with linear scales and delta asda A2 servos

Category: Basic Configuration

Hi guys, 

When I had the old siemens drives, I bought a mesa 7i97 for analog control of the drives. In the meantime I replaced the servos with some new ones from delta that also have support for step-dir so I decided to replace the board with a 7i95T. 
I have the board wired, the axes do move in the right directions and the encoders are scaled. 
However even if I move the machine slowly, I get following errors and even with a huge FERROR set, it still errors out. 
Also its not clear to me how to properly set the values of STEPGEN_MAX_VEL and STEPGEN_MAX_ACCEL and other step/dir related parameters. 
After reading a few posts, I understood that I should try to make them work in open loop, then close the loop.
But if I don't link the encoder feedback, I need to set the scale to 40000 instead of 4000 to get 1mm of motion.
Its been over 5 years since I interacted with step dir and I can't say I properly understood them then. 
I don't know yet if I will connect the linear scale directly into the drives or if I will close the position loop in linuxcnc. 
I was thinking to let the drives close the position loop and just get the position feedback from the simulated encoder output of the drives. 

I generated a default configuration with a config tool, then I started modifying it.
I am attaching the files so that you can take a look over them.

Any suggestions would be appreciated.
  • digiex_chris
  • digiex_chris
08 Oct 2024 16:15

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

Category: Computers and Hardware

Thank you Meister for showing me how to set toolchain in my config file, and accepting my PR. 

I've added a docker setup that hopefully will help run this project without having to install anything more than Docker. It allows you to flash your device from the UI inside the docker container as well. It will output to /workspace/Output which will be mounted into the same directory you ran Make from, so the output will go to the same place as normal. See DOCKER.md in the repo root for more details.

Note that I have only setup the oss-cad-suite toolchain, so if your board defaults to gowin or something, you'll need to add 
"toolchain":"icestorm",
to your config.json before compiling. Assuming your board supports icestorm anyway. I was testing this on a TangNano9k, and was able to flash with it plugged into the host.

Hope this helps! Unfortunately I don't know enough python to add a toolchain selector in the time I have available, any volunteers?
  • bkt
  • bkt's Avatar
08 Oct 2024 15:59 - 08 Oct 2024 16:00
  • tommylight
  • tommylight's Avatar
08 Oct 2024 15:29
Replied by tommylight on topic driven tools on cnc lathe

driven tools on cnc lathe

Category: General LinuxCNC Questions

Does it have a turret/tool changer?
Everything is feasible as long as you have time/money/nerves to plump into it! :)
Pictures would help ...
  • juliankoenig87
  • juliankoenig87
08 Oct 2024 15:27

Switch to teleop mode while unhomed bei MDI cmd or try to start nc code

Category: AXIS

Yes I know that, thank you nonetheless. That will be the solution in my case so that I dont have to bother with the teleop mode switching. So yes, there are more ways to skin a cat ;-)

Question is. Is this a bug and should I send a report or do I missunderstand the logic behind the modes?
  • rammfr
  • rammfr
08 Oct 2024 15:24
Replied by rammfr on topic Ethercat, EL6751 and CANOpen

Ethercat, EL6751 and CANOpen

Category: EtherCAT

Hello everybody,
I'm also stuck with the setup of CANOpen communication via Ethercat.
I'm also trying to get the EL6751 master connected to Kollmorgen Servostar 600 Drives, with no luck -- in my case I think the Firmware and/or Hardware version of my EL6751 device is the issue. Please, can anybody with a working setup tell me the Firmware and Serial number of his/her device. Mine is Firmware v13, Serial Number 45080708, and I do not get the (as I've read in this Forum) mandatory Option Modular Device Profil Mapping in Twincat...
BR Franz
  • tommylight
  • tommylight's Avatar
08 Oct 2024 15:17

Switch to teleop mode while unhomed bei MDI cmd or try to start nc code

Category: AXIS

To set the homing velocity HOME_SEARCH_VELOCITY
To set the jog velocity in display section DEFAULT_LINEAR_VELOCITY and traj section DEFAULT_LINEAR_VELOCITY
Values are is mm/s,
  • viski
  • viski
08 Oct 2024 15:15
driven tools on cnc lathe was created by viski

driven tools on cnc lathe

Category: General LinuxCNC Questions

Hello dear people!

I have a retrofited lathe cnc machine and i would like to add on it a servo ( that i could drill on plane holes and make threads ).

Is it feasible? 

I am useing mesa 5i20 and +/-10v output board for servo 
 
  • tommylight
  • tommylight's Avatar
08 Oct 2024 15:04
Replied by tommylight on topic Retrofiting Scm record 220

Retrofiting Scm record 220

Category: CNC Machines

The best solution is always, always, LinuxCNC and Mesa.
I have retrofitted several fully working machines with LinuxCNC, including my personal Mazak.
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If only the battery is the issue, it is easy to check, power it on, enter the missing parameters and the machine should work until power off. Finding the parameters might not be easy, or you might have them already if you have the documentation. Or there might be no missing parameters at all...
If it is the BIOS battery that complains as soon as the PC starts, just press F1, it should continue and work, but if there are ISA slot cards in use on the PC that might also needs setting parameters in BIOS. The battery is usually CR2025, costs 1 Euro.
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You are near me, so when someone tells you it is the battery, most probably it is all gone to hell.
From experience, 1 in roughly 150 times it turns out to be what i was told.
  • tommylight
  • tommylight's Avatar
08 Oct 2024 14:40

Linuxcnc controlled by smart phone or other device running a webbrowser

Category: General LinuxCNC Questions

This seems much more responsive than i what i recall from the other web app, nice! :)
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Yes we had some flooding, not tragic, both my shops were flooded, luckily i was in the shop when the water started entering in so i moved everything on the tables, and an EOD tank on top of some rubber flooring, by the time i moved everything i could, there were 15cm of water inside, so i ran to the other shop and got terrified as there was nearly half a meter of water running through there, the gutters were clogged with leafs so all the water was coming in, could not move anything as the water was also pouring all over the power box so i just left, was not feeling like being electrocuted as the power was still on, went back, turned power off to both shops from the main power distribution and went home to shower as i was completely and utterly wet! :)
Luckily, no major damage, good weather after so everything was dry in 2-3 days.
  • unromeo21
  • unromeo21
08 Oct 2024 14:29

LitexCNC: firmware and driver for 5A-75B and 5A-75E

Category: Driver Boards

Please ignore my post above. First time working with a servo thread, had no clue how to initialize it... it seems to work now.
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