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  • feng
  • feng
Yesterday 09:17

SmartSerial on cheap ESP32-8ch-Relais Card

Category: Driver Boards

The translation into English is:

"Is the 7I92 pin compiled as:

10 30 IOPort SSerial 0 TXData0 (Out)
11 31 IOPort SSerial 0 RXData0
?
  • feng
  • feng
Yesterday 09:12

SmartSerial on cheap ESP32-8ch-Relais Card

Category: Driver Boards

The translation into English is:

"Do I only need this HAL configuration:

loadrt hm2_eth board_ip="10.10.10.10" config="num_encoders=1 num_pwmgens=1 num_stepgens=5 sserial_port_0=0xxxxxxx"

Or are there other settings required as well?"
  • meister
  • meister
Yesterday 08:41

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

Category: Computers and Hardware

I'm trying to decide on a connection for my satellites

Ethernet or Firewire Cables, 5V or 24V ?

* RJ45 is cheaper, but could be confused with Ethernet
* FireWire uses thicker cablesCheaper
* satellite boards can be built using 5V, but 24V is practical for many sensors and limit switches
* RJ45 and 5V are compatible with Mesa-SmartSerial (except for the firmware)

Does anyone have any ideas?
  • meister
  • meister
Yesterday 08:18
Replied by meister on topic SmartSerial on cheap ESP32-8ch-Relais Card

SmartSerial on cheap ESP32-8ch-Relais Card

Category: Driver Boards

no, but you can see the new pins with:

halcmd show
  • feng
  • feng
Yesterday 08:13

SmartSerial on cheap ESP32-8ch-Relais Card

Category: Driver Boards

Hello, I'm trying to clone this board. Do you have any HAL file references?
  • tommylight
  • tommylight's Avatar
23 Mar 2026 22:51

THC not getting active even when "all seemingly needed" requirements are met

Category: Plasmac

Screenshot of the settings page?
In the meantime, disable:
-auto volts
-void sense/void lock
-set the arcok high to 160V
-set the arcok low to 60V
-set VAD to 60-65%
-set the cut voltage to (in your case) 100V
-set the feed rate to 2000mm/m
-set the jog speed to roughly 2000mm/m
-press F9 to fire the torch
-press an arrow key to jog
-watch the LED's on screen for arcok/up/down
Material for testing, 2-3mm thick, current set to 40-60A
Make some test cuts, check the under side of the cuts for dross and how easy it is to remove it, adjust feed rate/ air pressure (only while air is ON) and cut voltage till you get nice clean cuts with little dross.
  • tommylight
  • tommylight's Avatar
23 Mar 2026 22:42

Closed loop - encoder/position not updating while moving

Category: HAL

It has somehow to do with the enabled stepper motors. As soon as the drive gets the enable signal the pins don´t change anymore (viewed them in hal config). Wen i check with the multimeter, the signal seems to be switching between 0.2V an 24V correctly (both with stepper enabled/disabled). Maybe it is an issue with those cheap breakout boards ?

That is almost always an interference/wiring/grounding/shielding issue, and cheap BOB's with optocouplers are very slow so will limit speed a lot, the ones with input buffers should be OK.
But, 24V? What encoders are those?
Upload some pictures of the wiring here so we can have a look.
  • tommylight
  • tommylight's Avatar
23 Mar 2026 22:33
Replied by tommylight on topic Using the BIQU MicroProbe v2.0 sensor as a probe?

Using the BIQU MicroProbe v2.0 sensor as a probe?

Category: General LinuxCNC Questions

That is a version of BL-Touch sensor for 3D printers, usually 5 wires, +5V, 2XGND, sense pin and a servo pin that drives the sensing bit up/down.
Should be pretty easy to make it work, the "push sensor down"/"pull sensor up" logic should be similar to RC servo, but i never bothered to check, despite having several in use on Voron's i built.
Precision is quite high and temperature drift is quite low, but i doubt it is precise enough for a mill, should be more than enough for most routers.
  • abs32
  • abs32
23 Mar 2026 21:15

Using the BIQU MicroProbe v2.0 sensor as a probe?

Category: General LinuxCNC Questions

www.amazon.com/MicroProbe-Leveling-Print...ruders/dp/B0C89G7YH2
Colleagues, here is a device. Electrical connections: 5 wires. 
Connector: 5-wire, compatible with BLTouch:
    Black — GND (ground)
    Red — +5V
    Yellow — Servos (rod control)
    White — Probe (output signal)

Has anyone tried this? I'd love to hear about your experience using it as a probe. The ad highlights a very appealing feature—the
trigger weight is only 5 grams.

 
  • backyardengineer
  • backyardengineer
23 Mar 2026 20:08
Replied by backyardengineer on topic Closed loop - encoder/position not updating while moving

Closed loop - encoder/position not updating while moving

Category: HAL

It has somehow to do with the enabled stepper motors. As soon as the drive gets the enable signal the pins don´t change anymore (viewed them in hal config). Wen i check with the multimeter, the signal seems to be switching between 0.2V an 24V correctly (both with stepper enabled/disabled). Maybe it is an issue with those cheap breakout boards ?
  • GeneRF
  • GeneRF
23 Mar 2026 19:59
Replied by GeneRF on topic Variable input during automatic operation

Variable input during automatic operation

Category: General LinuxCNC Questions

As I said, change of workpiece length, or as you say, change of depth.
  • 3404gerber
  • 3404gerber
23 Mar 2026 19:56
Replied by 3404gerber on topic Variable input during automatic operation

Variable input during automatic operation

Category: General LinuxCNC Questions

Found this post,  sounds similar to what you need.
  • AntonioT
  • AntonioT
23 Mar 2026 19:05

THC not getting active even when "all seemingly needed" requirements are met

Category: Plasmac

Hello All,

New to the forum and first of all would like to thank you for the valuable information you guys post, it has helped so much me moving ahead with my build. id appreciate your help with my issue where it cannot activate the thc even when all the settings (that i know of) have been properly adjusted. first my setup:
-LinuxCNC QTPlasmac table
-Rpi5 with image LinuxCNC 2.9.8 Raspberry Pi 4/5 OS based on Debian Trixie
-Mesa 7176s over ethernet
-THCAD2 + 3M resistor array enclosed near the plasma source, F+/F- routed to mesaboard encoder input A with shielded microphone cable grounded at control side, also used a more simple twisted pair for testing.
-Used Pnconf for setting thcad2 trimming and ratio
Tested for correct voltage measuring for example, hooked a power supply from 39 to 56 volts and Main screen voltage readings coincide very accurately to multimeter reading.
-Flaring 65 plasma source with no cnc interface. (HF piercing) voltage probing connected to torch (-) and clamp (+) leads.
-For testing im using a straight line of 100mm at full speed so thc is not affected by speed reduction  (tested from 400 to 1800 mm/min)
-THC is enabled
-Mode 0 is used so arc ok is derived from voltage readings
-setup plasmac.arc_lost_delay =.3 as was having some issues for getting it to start cutting due to initial spike/valley.

I took the follwing HALSCOPE trace where:

 

1)torch on triggers,
2)probe voltage goes to 260 for piercing, then falls, then recovers to around 94v
3)Arc OK signal goes to true
4)Pierce delay elapses
5)Movement starts
6)THC active never goes up and of course  no correction

as Far as I can see voltage is "stable" once cut starts and there is no variation that could lead to deactivation as the tresholds are LOW=39 HIGH 990 (for testing purposes), samples 10 and threshold voltage 10.

has anyone had this issue or any lead on what to look at?
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