Doubt on optional inputs, single block and block delete

[Bharathk-Gowda]

Sorry for asking below silly doubts about optional inputs in grblHAL web builder, if they are wrong kindly correct me.

1. Safety Door :- if we open the machine door during cycle start machine will be forced to feed hold.
2. Tool setter :- for setting the tool offset, tool offsets are saved in parameter 5061 - 5069.
3. Second probe :- is it for measuring component offset? can we use only one input for both Tool setter and Second probe? where do Offset values save after measuring the component?
4. Limits override :- Please explain in brief.
5. Single step G code block :- is it for enabling Single block execution? I don't need to use separate input for this but I need to enable and disable this using $ codes, is there any $ codes available.
6. Block delete :- should we add / in front of G code line for which we need to skip the G code line? same as above option I don't need to use separate input for this but I need to enable and disable this using $ codes, is there any $ codes available.
7. Optional stop disable :- Please explain in brief, same as above option I don't need to use separate input for this but I need to enable and disable this using $ codes, is there any $ codes available.
8. Probe disconnected :- Please explain in brief.
9. MCP3221 I2C ADC :- Please explain in brief.

This is extended question, Is there any IO ports expansion Hardware for grblHAL, if any kindly refer.

Dear sir,

Thanks & regards
Bharath

[terjeio]

1. Feed hold + stop spindle, optionally move to parking position (controlled by settings)
2. Functionality is same as for regular probe, but with different input. Can be used with one controller probe input and relay(s) to switch source.
3. As 2 above. How it is used is up to you. One use is for probing with a BLTouch probe.
4. Overrides limit inputs to allow for motion to move away from switches when triggered (when hard limits is enabled).
5. $S
6. $B - yes it controls execution of lines starting with /
7. $O
   The commands for 5, 6 and 7 toggles the function on/off and are only available if the corresponding inputs are not. $help commands list them (and all other available commands).
8. Used to detect probe disconnects, blocks probing or feed hold and raise an alarm if disconnect detected during probing.
9. I2C based ADC (pdf). Requires board with I2C connector.

There is expander support, the core can handle up to 24 digital inputs and outputs, and 8 analog. Official plugin code is available for MCP3221, MCP4725 and PCA9654E I2C expanders. Recently support has been added for the FluidNC expander. Some 3rd party plugin code for expanders exists.

FYI I have "ported" the FluidNC expander board code to the RP2040 MCU as an alternative to the STM32F103. To be published later.

[Bharathk-Gowda]

Thanks a lot for making me understand and i validated few points they are working good.

I am still struck in few points as below, kindly support.

1. in grbl HAL web builder ---> General page --> Probe input, is it for tool offset probing or Component probing ?
2. in MY machine i need to configure two probes, 1 is for tool offset probing and 2nd is for Component probing, kindly give me the best solution, i am not good at coding suggest me enabling in web builder or editing in My_machine.h .
3. I am still in confusion for which board to use for IO expansion, kindly suggest best one.

Thanks & regards
Bharath.

[terjeio]

1. Both. If you have two probes they can be wired in series or parallel depending on the type of contacts (NC vs NO). Some users do not like this since it is not possible (for the firmware) to know which probe is triggered.
2. By default the primary (first) probe is always enabled, the toolsetter is not. Remove the leading slashes (//) to enable the the toolsetter input.
3. The best one is the one that suit your requirements. Since I do not know for which board and your requirements it is impossible for me to suggest any.

[Bharathk-Gowda]

Thanks a lot sir,

I was studying the wiki, Additional or extended settings page was not updated, kindly provide the list of G codes, M codes and $ commands which are tested and Validated as per LinuxCNC.

[terjeio]

Supported G-codes are listed here.
Plugins may add M-codes that are adopted from Marlin or custom, see the relevant plugin readme.
The command $help commands will output $-commands supported with a brief description.

More detailed documentation is worked on, to be released when ready.