I’ve had this happen a couple time…Using a Sainsmart CNC3018 Pro router…Will set the zero point in X,Y and Z. I’ll retool and the spindle will return to zero just fine. I have to reset the Z zero using a Z Probe obviously but the X and Y lines up just fine. But the next time it will return accurately in the X axis but will be off in the Y axis. I’m not sure why this happens??? I’m using Universal G code Sender. I’m new to this so hoping for an obvious thing I’m doing wrong.
Thanks, Sam
That’s not something which we can help w/ here — this forum is for machines sold by Carbide 3D — if you have difficulties using Carbide Create w/ your machine we can assist w/ that.
You are not doing anything wrong. UGS does not save the Z to the new tool length, that has to be set every tool change due to the human aspect can’t assure the tool is set to the exact length from the spindle.
I have a 3018 with a pro spindle. I also have a Carbide3D Shapeoko Pro XXL with a Bit Setter that checks and sets the zero, calculating the difference in length automatically. A very nice feature I might add.
Although the X & Y are maintained in the SPXXL any new Gcode file loaded, or material/stock change the Z must be set yet again.
Three ‘w/’ to save six characters and make it harder to read … c’mon Will!!! 
People just love giving you a rough way to go, don’t they?
Including me at times. 
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