Issue with MDI commands

Software Carbide Motion
1

Good morning.

Up until yesterday, I was able to use the following MDI commands successfully:

G91 G0 Y-800
G91 G0 X600

Today, G91 G0 Y-800 works fine.

However, G91 G0 X600 runs the X-axis all the way to the right rail - ignoring the proximity sensor completely.

I have:

  1. Reloaded the default machine configuration (SO 4XXL) in CM (v 575) and retested - same issue
  2. Upgraded CM to the latest version, and walked through the entire machine setup process - same issue

I’m attempting the evaluate the squareness of my machine after resquaring the machine frame and adjusting belt tension.

2

Where is the origin set when you are sending these commands?

Please note that the switches are only active when homing — configuring them as limit switches would require adding additional switches at the opposite ends of each axis and using shielded wiring.

4

NW corner, then jog Y up until it stops, then X left until it stops.

There is a proximity sensor on the right side of the gantry - I assume that in MDI all proximity sensors are ignored?

5

The homing switches would only be used in the MDI if one triggered a homing function.

6

The switches are not the focus of my issue.

The issue is that MDI isn’t executing/honoring movement to Y-800 (or X800 for that matter).

This image shows the current X-Y axis when I issue the command.

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image1092×631 54.7 KB

7

Given a relative motion (G91) where would:

-865.000 + -800 == 1,665.000

EDIT: missed that the movement was along Y

so

-1 + -800 == -801 (along Y)

Can you jog the machine to -801 on the Y-axis?

8

He’s currently at Y-1.000, so moving another Y-800 would take him to Y-801.000

And he’s at X-865, so moving +800 would take him to X-65.000

…Relative to the current Zero

Which should be enough room if he’s at the NW corner.

Might be more helpful to see Machine Position. (Click on the word “Position” above the readout)

2 Likes
9

image
image1092×522 66 KB

10

So you didn’t have a zero set. (which is OK)

The right rail should be at X0.0 in machine coordinates. So moving to X-65 using G91 G0 X800,
or moving to X-265 using your original G91 G0 X600 should not be a problem.

What does the X read if you move it to the right rail?

11

image
image1092×522 65.2 KB

12

This is a brand new default configuration for an SO 4 XXL. I’ve not set/changed anything in CM.

The irony is all of the listed MDI commands were working just as expected for the last several days. Things went south yesterday morning. In the attempt to troubleshoot further, I upgraded to CM v617, and took all of the defaults, but the issues persisted.

About 1/2 hour ago, I uninstalled CM, rebooted, reinstalled CM, rebooted, went through the configuration (again…taking the defaults for SO 4 XXL).

Low and behold, MDI is working as expected.

Thanks for your assistance!

13

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