[Grbl_Esp32 Issue#687] Auto square endstop offsets About GRBL HAL

Issue #687 | 状态: 进行中 | 作者: RootCNC | 创建时间: 2020-12-01

标签: enhancement

I might be mistaken but I cannot find information on it

Please describe the feature you would like implemented
Request the addition of the option to apply software offset for fixed endstop on cloned axis. For example, the Root CNC and MPCNC has a gantry style system with dual axis motors. Doing a home routing ($H) I believe the software assume the error has been removed by mechanically adjusting the endstop in order to yield a square machine. It would be amazing if GRBL ESP32 can feature an offset to for a given axis. Similar to Reprap Marlin firmware and also this fork of grbl-Mega-5X,

Marlin information LINK
V1 forum post LINK

Why do you think this would improve Grbl_ESP32?
I believe so – this will allow for fine control of gantry racking.

What do you need the feature for?
Gantry style machine that are controlled by two motors.

Will this feature appear to a lot of users?
I hope so – Root CNC and MPCNC has a number of build world wide.

Appreciate the support!

#1 – bdring 于 2020-12-01

I’ll add this to the “wishlist” section of our development tracking system. I can see how it might be easier to integrate switches into parts that don’t move on some machines.

#2 – RootCNC 于 2020-12-01

Thanks Bart,

Unfortunately, the endstops have been fixed on the Root CNC machine right from the earliest – you can see them

#3 – reynolds087 于 2020-12-01

The limit switches/mounting brackets I have are very cumbersome to adjust, and don’t have any fine tuning mechanism. Being able to define the offset in software would greatly increase the dimensional accuracy of my gantry. I ended up purchasing some hall effect sensors and designed a bracket to adjust the magnet distance with a screw, but it required a redesign of my control board, and still not fully implemented.

Here is a second vote for this request.

#4 – RootCNC 于 2021-02-12

Is there any updates on this?

#5 – bdring 于 2021-02-12

We have not done anything on this yet.

We are working on 2 versions of the firmware.

– With the current version, we are fixing issues as they come up and adding only critical features.
– We are also working on a next generation version where it is much easier to add complex settings, like a limit switch with multiple parameters. The primary feature of the next generation is the configuration is done at run time. You can completely change your machine without a recompile.

We don’t want to have to add features to the current version when we know we would have to start over to do it a better way on the next version.

Our development roadmap is on a Trello board. This request is on there.

#6 – RootCNC 于 2021-02-15

Oh wow, fair enough. I totally understand.

I’ll look into the Trello Board and keep and eye on it.

Keep up the great work!

原始Issue: https://github.com/bdring/Grbl_Esp32/issues/687

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