GUI not connecting

gSender 🐛 Bug
1

I just acquired a sainsmart 4040-PRO. I’ve used gsender with other sainsmart cnc on Linux mint with no issues. When I connect to the 4040 it shows connect but the gui won’t connect. The grey box in the visualizer stays grey and says connecting. I can view all the settings on the controller ($$) and manually move the machine using the console but everything else stays grayed out. This machine differs in that it is a 32 bit ARM Microprocessor. This board does not enter the alarm state at power on or reset, the machine coordinates are set at zero wherever the spindle happens to be

2

It appears that gSender requires an alarm state to finishing connecting the GUI. If I manually trip a limit switch, the machine enters an alarm state, and everything connects and works as expected.

3

Does your micro controller have a soft reset?
Can you post a screenshot of what you get initially (right after you connect

4

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image1920×887 141 KB

There are a couple of settings on the controller that I didn’t recognize from my prior sainsmart. I didn’t get a chance to see what there were yet.

5

Noah
I’m not very familiar a sainsmart 4040
However, Is this screen grab similar to your controller?

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If it is what happens when you connect to your controller via gsender and press the soft reset key I see here.

6

I can’t see any soft reset or setting in the firmware to throw an alarm when connecting. Easy enough to just trip a limit switch and get it to connect.

7

Sounds like the issue I had.

8

Try sending a ? command from the console. That requests a status update from grbl and shows gSender that it is actually connected.

9

That worked. Thanks!

10

Just an add to this, the gui connects when sending a ? in the console but not all the jogs/homing icons show up. Tripping a limit switch seems to be the way around this.