Setting Grbl Configuration in CM 517 and later

WillAdams · November 27, 2020, 2:09am

Carbide Motion 517 uses a new system for setting Travel Dimensions which is potentially confusing:

Pressing the Load Defaults button takes one to a window which allows one to select first machine size:

and then Z-axis type:

after which selection the Travel Dimensions for the selections made are entered into the dialog and will be preserved if one clicks “Ok” (and of course that change discarded if one selects “Cancel”).

In addition there is a “Send Configuration Data” which actually sends settings to Grbl (the Travel Dimensions are for Carbide Motion to use for features such as Rapid Position). Pressing it brings up another window where one may select first machine type:

at which point the configuration will be sent:

Since it is sent to the EEPROM on the machine’s control board, Canceling out of the dialog will not undo any changes.

It is important that the selections made for the two sections be consistent — one wouldn’t want the machine bottoming out if an HDZ is selected for instance.

WillAdams · November 27, 2020, 4:27am

Note that for 517 at this time if using an HDZ it is necessary to manually change the Z-axis Travel Dimension to 140.

gdon_2003 · November 27, 2020, 4:47am

I have downloaded 5.17 and am currently on 5.13, the configuration on the eeprom would still be set from the 5.13. So is it necessary to resend the config just because you upgrade to 5.17? From what I see above if you resend the configuration the HDZ must be set to 140 but otherwise when you pick your size of machine the other parameters are automatically set? I will most likely upgrade tomorrow after I see the answers. Thanks

WillAdams · November 27, 2020, 12:58pm

No, the EEPROM configuration is persistent, and once it has been set for a given machine using a series 500 build of Carbide Motion should be fine and doesn’t need to be updated.

NewToThis · November 27, 2020, 4:22pm

@WillAdams, I think you read my mind with this!

I was about to ask why the screens were so different between the installation guide for the BitSetter and reality, then realised I was still using 5.17 rather than 5.13 (which I’d decided to revert to), but you’ve explained it perfectly, thank you.

quicky06 · December 1, 2020, 6:09pm

Can you tell me what the dimensions will be in order to have the same configuration of what was previously listed as hdz reduced x travel (ball screw) for those of us with a pwncnc boot?

WillAdams · December 3, 2020, 8:37pm

The X and Y for that would be the same as for a belt drive or Z-Plus unit.

WillAdams · December 27, 2020, 2:09am

This topic was automatically closed after 30 days. New replies are no longer allowed.

WillAdams · February 7, 2021, 1:20am

WillAdams · February 7, 2021, 1:20am

Note that the newer versions have additional panes for Options and so forth:

WillAdams · February 18, 2021, 3:33am

To allow folks to confirm their Grbl configurations, here are the settings for:

Setting	Belt Drive Z-axis	Z-Plus (inc. Pro)	HDZ
$100	40	40	40
$101	40	40	40
$102	40	200	320

The Travel Dimensions for the various machine sizes and options are:

Machine size and Z-axis type	X	Y	Z
Shapeoko 3 Standard Belt Drive	420	430	100
Shapeoko 3 Standard Z-Plus	420	430	95
Shapeoko 3 Standard HDZ	420	430	140
Shapeoko XL Belt Drive	830	430	100
Shapeoko XL Z-Plus	830	430	95
Shapeoko XL HDZ	830	430	140
Shapeoko XXL Belt Drive	830	850	100
Shapeoko XXL Z-Plus	830	850	95
Shapeoko XXL HDZ	830	850	140
Shapeoko Pro XL	870	440	95
Shapeoko Pro XXL	870	850	95

Note that it is possible to increase X-axis travel if using an HDZ w/o a dust collection system which limits X-axis travel.