Carbide Motion 649 was released today. Other than the breif description in the email, is there any other information avaiable? Note that the blog post is dated Feb 2024. Thanks.
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The download site says 16Jul25, Carbide Motion Downloads
and “Fix - Logging for Pendant feedhold/start/estop”
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I realize that the download shows 16Jul25. But when I click on the blog link, shown in that window it take me to a page that was published in 2024. What am I missing?
There’s a blog? Ah, the link way down at the bottom. Looks like it hasn’t been updated in a while.
The most recent ‘release notes’ are on the download page. And they’re usually pretty terse.
Rob usually posts in here when something new comes out.
There’s a lot of ‘out of date’ material floating around. The CC manual is 2 versions behind. (2021ish)
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649 going to stable was announced in the Carbide 3D Newsletter:
https://carbide3d.com/pages/newsletter/
You can try it in Carbide Motion 649 at Carbide Motion Downloads
which is not available, save as an e-mail.
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A post was split to a new topic: Programming G-code manually
After upgrading to Carbide Motion 649 every tool change says to set the spindle speed to 5 (24000 RPM) even though the design (Edit Tool) shows different (e.g. 18000 RPM). Did I miss something in the release instructions that I did not read? 
Upload a .c2d file and a screengrab showing this?
SpiralBindingJig.c2d (220 KB)
Experimental project to see if you can cut holes in a stack of paper for spiral binding. If it works I will post to CutRocket. I have only worked on two projects since updating to 649 and the RPM change has said 24000 for every tool.
The project I was working on uses inches so I created a simple test project that uses MM to see if that made any difference. I have previously observed strange behaviors when adding a tool to a user library where the underlying project uses MM and the tool to be added is defined in inches. Same result, the tool change called for 24000 RPM.
RPM Test Carbide Motion 649.c2d (44 KB)
Is your Shapeoko equipped with a VFD Spindle or router?
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C3D compact router via bitrunner V2.
I suspect this is caused by Carbide Motion using a lookup table based on tooling.
Try duplicating the Carbide 3D tool and then changing its number — that should then yield the desired RPM request.
That said, I try to set up all my files to run at the same speed so that it isn’t necessary to change the dial.
I duplicated tool #301 to a user library tool #399 (18000 RPM) on a small test project and got the same results with Carbide Motion prompting for a speed change to 24000 RPM. No big deal as like you I usually design to run at the same speed and can just ignore the speed change message.
RPM Test Carbide Motion 649.c2d (44 KB)
I was able to get 17,500 to show in build 649:
(note that the default for this tool in the selected material was 18,000 RPM
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I deleted Carbide Motion 649, loaded Carbide Motion 622, ran a simple test and everything worked OK. I then deleted 622 and reloaded 649 and ran the same test. The default RPM for the toolpath (simple 1mm carve with #102 of a circle) was 10000RPM. Carbide Motion 649 asked for a change to 24000RPM. I then went back to the project and changed the RPM to 17500 but Carbide Motion 649 still prompted for a change to 24000RPM. I am running Carbide Create on M2 Mac and Carbide Motion on M1 Mac.
CarbideMotionToolChangeTest.c2d (44 KB)
I had a similar situation the other day when I wanted to reload CM 649. In my haste to get going I made a selection in one of the Setup Wizzards screens. I made the selection and clicked on the “Next” to continue. What I missed doing was clicking on the “Save Configuration” first before clicking on the “Next” button. You shouldn’t get that prompt to set the speed if the spindle was selected and saved.
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Anyone who cannot get the set speed to display in CM 649 should upload their .json file for Carbide Motion (click on the version #, choose “Open Data Directory”, find the .json file which matches the machine which has the problem).
After installing 649 I did run the “Setup New Machine” Wizard. I left the checkbox to popup for spindle change “checked” because I am running the compact router via bitrunner. JSON file is attached.
shapeoko.json (787 Bytes)