SX3/G540 Timing belt

[grannygear]

Hello everyone,

I'm finished up my SX3 CNC conversion using CreviceReamer's G540 recommendation and CNCFusion Deluxe kit. I have the recommended pulley installed on the Z-axis stepper, but the trouble is the stock timing belt is a little bit too long even with the motor mount fully extended. I looked on McMaster-Carr and wasn't able to readily identify a shorter belt.

Any suggestions?? Thanks.

[Crevice Reamer]

Hi GG. Welcome to the Zone!

I'm guessing you didn't TELL Michael you were going to use the G540, or order the CNCFusion kit WITH the "CR" option--which would have given you TWO different pulleys than the normal version. Sometimes the single SDPSI pulley that I used to recommend does this, as some timing belts are longer than spec.

You have three choices:

1 Ask Michael to sell you the 2 CR Pulleys that he provides with CR option. They are designed to work with regular timing belt and stay within adjustment tolerance.

2. Ask Michael for SDPSI part numbers and buy 2 new pulleys yourself.

I can't speak for Michael, but he's a good guy and MIGHT even exchange your stock pulleys for "CR" pulleys.

support@cncfusion.com

3. Try to cut longer slots into Z motor mount for more adjustment

I recommend #1 or 2.

Not sure why you posted this in the SYIL forum instead of Benchtop machines.

CR.