Centroid Community CNC Support Forum

Wow. That is a big machine. More like the size one expects from a bed mill rather than a knee mill, unless you meant a bed mill in your first post. Maybe the motors are a bit undersized, I can’t answer that, but the control certainly should show an error if it can’t reach position. I would run some ...

So you are running this on 3 phase, have a 2 Kva transformer, and 27.5 in-lb servos. That is plenty for a knee mill. What was the original issue you had with the Y axis? Just trying to figure if there is a relationship here as Y appears to be your current issue. How so your load bars on the CNC12 sc...

Clicking on the picture to zoom in, the picture rotates. Looking at that picture I notice that it looks like the bottom 2 pockets and the upper right pocket are too wide, and they are too wide to the same side of the picture, which I am guessing is the Y+ direction. The shape of the cuts seems to co...

Soldering to a DB-9 Connector. I had a gentleman send me his cables and encoders because he kept getting differential errors. Upon examination I was able to readily pull one of the encoder wires right out of the pin. The solder did not flow out and bond to the pin as seen in this picture. (white wi...

You clearly found some mechanical problems, so their is no point speculating about a control error at this point. It is very important to use the proper angular contact bearings with ball screws. Without good mechanics, all bets for good accuracy are off.

If your ways are not moving freely, your drive train will "wind up". You need to make sure your mechanicals are in good order first. Your ballscrews need to be reasonably linear and the backlash needs to be set with high accuracy. If you have wear on the ways and/or ballscrew it generally ...

I'm not sure if you are agreeing or disagreeing - I could read it either way in places. At least we seem to agree that chip evacuation is key at least. I disagree with you that flood coolant is not a good choice for machining aluminum. This is flat out wrong as flood coolant is used in nearly every...

In my experience, chip welding is about the only reason I end up with broken cutters. That's not about cooling or lubrication (not required for carbide really), it's about evacuating the chips from near the cutter. This is most likely to occur when machining a pocket or slot and I find that coolant...

I am just looking for a good starting point for HSS in aluminum. Do you have flood cooling? Going to be difficult to avoid chip welding to tool. WD-40 works well to help eliminate welding, but you are going to have those fumes burning off into the air you are breathing. ZrN coated tools resist weld...

I would use a Mfunc6 macro, which gets called instead of your normal M6 tool change. Put a M00 code in that macro which stops and allows you to jog your axis and set Z zero again. So every time M6 gets called, you end up calling M00 to pause and allow jogging, and then you can set your new Z-zero. Y...