I want to slow down the travel speed ONLY when Homing. How can I make these changes in the device setting?
GRBL config $25 and $24 set homing speed. $25 is homing seek speed in mm/min and is the speed used when first homing. $24 is homing feed speed also in mm/min and is the speed used during the second half of the homing cycle after the time the homing switches are actuated.
IN the consol window, do I simply enter $25=1000 to make a change from the existing speed of 3000?
Thank you in advance
That will work. You could also change these in Edit->Machine Settings.
Ok. In the console I entered $25=1000.0, and received an OK.
When I check it in machine settings, it still shows 3000.0
Then I restart Lightburn.
Nothing changes in the machine settings or in the console.
Please tell me what I am doing wrong
Could you be seeing a cached view?
Run $$ in Console to see current values.
berainlb,
i appreciate your help with this. i should mention that i’m a very old man and not technical and dont know what you mean about seeing a cache view.
i did the $$ in the consol and the $25=3000.0 does not change to 1000.0. its also $25=3000.0 in the machine setting.
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Can you confirm what laser you’re attempting this on? I assumed this was for an Ortur Laser Master 2 based on the limited information in your profile. This process should work fine on Ortur lasers but may not work on other lasers if the firmware has been locked out from making changes.
Some systems will read from the controller and then show a local or cached copy of the controller. What you change on the local version are not reflected on the controller until written back. In that case it’s possible that what you see locally and what’s actually on the controller may be different. I was just speculating what could be a potential issue.
In that case sounds like it did not take.
Try changing in Machine Settings and then writing back to the controller. Then re-read from controller to see if changes have taken place.
Again, thank you for all your help.
I have the Xtool 40 watt laser and installed the xtool profiles provided by xtool
Ah… that explains it.
xTool forbid any configuration changes and are not running a typical GRBL firmware. You will be limited to what you can tweak in XCS. From what I’ve seen I don’t believe homing speed is one of those things that can be changed.
Is there a reason why you’re trying to change the homing speed?
I want to improve the accuracy when homing and using the xtool limit switches. Currently, when homing, it “charges or bangs” into the switch. I want to avoid this and slowly creep into the limit switches for better and consistent homing.
Do you have the D1 or D1 Pro?
Not sure about the D1 but the Pro model should already have a 2-step homing cycle where the second stage already uses a slower speed to complete homing.
If you’re experiencing unreliable homing position there’s likely something else going on.
What type of precision are you getting with homing today? What is the variance per homing cycle?
I have the D1 pro. I attached a usb digital microscope on the laser head and centered it with a paper cross hairs. 8 out of 10 times it would home precisely 2 out of 10 it would be off. I contribute the homing error to the speed which the laser head contacts the limit switches. Hence the reason to slow down the final homing speed
What is the speed of $24? That’s the second and more important speed for repeatability of homing.
When it’s off by how much is it off?
From what I’ve seen the Pro uses proximity sensors which likely are only repeatable to around 1 tenths of a millimeter but not sure exactly what’s used there. I’d suggest making sure you’ve eliminated as much backlash as possible from the system as well as making sure there’s no resistance or undo force on the laser head near the home position.
I have made all the proper adjustment to the belt tensions. $24 is set to 25. The xtool limit switch tolerances are just ok but can be improves with a slower homing speed. like I mentioned, 8 out 10 times it is accurate. However, I strive for perfection if possbile.
I’m not aware of any user adjustable way to change homing speed on xTool machines. You may want to ask the manufacturer this but there’s been no luck for other similar configurations in the past.
It’s not certain to me that slowing the homing would necessarily improve precision. You may be at the limit of those switch types.
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thank you for all your help
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