New 65 mm vfd kit always 24K rpm

CNC Machines Shapeoko
1

I have tried everything I have found on this forum and generally online and can not figure out how to get the vfd to rpm at the speed sent in MDI as well as with a test cut via a project with CCreate. What am I missing! Always at 24000.

Thanks
James

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2

Did you send the configuration for a VFD or a BitRunner?

https://carbide3d.com/hub/docs/shapeoko-setup/

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3

VFD, tried set up a few times.

4

Check in with support@carbide3d.com and we’ll work through this with you.

5

I did, sent it to here and there.

Thanks.

6

Any chance you are also using Lightburn on this machine? If so, I’ll find my notes and elaborate, as there is a setting that will cause this if not returned to its correct value when going from Lightburn back to CC.

7

no, thanks though. working with the support team to get all taken care of .

8

OK - Hope you get it sorted soon.

For those using Lightburn, you run a macro before you use the laser, then another macro before you go back to CNC/Carbide Create. The important setting for the VFD here is $30. If you have a router, conventional advice is to set $30=1 when going back to CNC. This will cause a VFD spindle always run at 24,000 RPM. If you have a VFD spindle, you need to use $30=24000.

Here’s an example set of commands for an SO3XL:

USE LASER:
$32=1
$30=1000
$10=0
G10 L2 P1 X-825 Y-425

USE CNC:
$32=0
$30=1 (NOTE: $30=24000 if using a VFD Spindle)
$10=255
G10 L2 P1 X0 Y0

9

I’ll just add this in here…as I recall (also being a Lightburn and CM user) - it isn’t Lightburn that sets $30… it was actually CM that was setting $30 to 24000, causing Lightburn to not work properly…so we ended up putting $30 = 1000 into our “Use Laser” macro in Lightburn, to compensate / correct what had been changed. Then, you have to set it back to either 1 or 24000 in your “Use CNC” macro (as Steve points out).

So you would have to had created the Use Laser macro and added the $30 correction for this to be the issue.

  • G
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10

You guys have a lot more going on in your LightBurn Macros than I do. My CNC is a standard size SO3 with the 65mm C3D spindle. Along with that there is a J-Tech 7 Watt laser I use from time to time.

My Use Laser Macro:
G10 L2 P1 X-425 Y-425
$32=1

My Use CNC Macro:
G10 L2 P1 X0 Y0
$32=0

What does changing $10 do?

11

It’s been a long time since I set up this macro, but from my old notes, $10=0 makes position values display as positive numbers in Lightburn.

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