3xxl z plus zeros not holding

Hello I just installed the z plus with the inducts. Since then after homing my zeros all all off. Also my z is not the same. I set 8 mm pocket 1/4 end. Then 1/8 inside left for cleanup at 8mm and they cut at different depths. This is after I reset the z after installing the new bit.

Did you send the new machine configuration from Carbide Motion after installing the Z-Plus?

If you replaced a different type of Z-Axis, then you’ll need to update the controller’s configuration so it knows how many pulses per mm there are (this differs per axis).

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Another factor in changing Z to -Plus or HDZ is that the acceleration settings for Z get changed along with the steps/mm setting. Otherwise there is a risk of missed steps owing to overly-aggressive acceleration (don’t ask I how I know this…)

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@Gerry yes I updated the motion to show the Z plus. It took me a try or two to figure out its in two spots.

@AndyC where are this setting located? I have only changed the two settings on the size settings and the one right below that in the settings.

I think it is $132= but look for numbers probably around 450. The Shapeoko wiki will have it listed

@AndyC would that make it do this?


Today I told it 4mm inside left and 4mm pocket. And still left a ridge. To get rid of the ridge I moved the bit to the low spot and ran it again and that’s what happened it just lifted in the middle of the pocket and continued the pocket

Making Carbide Motion show Z-Plus is one step you need to do.

Hitting the button to send the configuration to the machine after you’ve made it show Z-Plus is the other step.

Just double-checking to make sure you did both.

@yeti To be honest the marks you are seeing look more to me like mechanical ‘slack’ in your system rather than lost or gained steps. Slack can result in too deep cuts in one direction and too shallow when the same axis reverses direction, good cuts until some stress on the machine happens etc.
I would be inclined to make an assessment of belts, pulley set-screws, vee-wheels, general fixing tightness etc., and a look at tramming. With this all done, if the problem is still there then maybe lost steps is what is happening - to my mind the causes of this are: high cutting force (blunt tool, excessive feed rate, very hard wood), high speed direction changes, too high setting for acceleration in the Grbl $ entries

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