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Question #: 1040

Question: I'm trying to test cnc with Mach 3 as it says in the book. When I send the g codes, nothing happens. I occasionally hear a bump from the machine, but there's no real rhyme or reason as to when it will bump. What could be wrong?

Current Solution

If the machine is not moving when you use a control program to control the electronics, there could be a many reasons this could happen.

First, make sure that you followed the electronics videos: https://www.buildyourcnc.com/CNCElectronicsandWiring.aspx

The computer sends pulses from the conmputer while the control program interprets the g-code. These puses from the computer should be received in the correct form from the breakout board, or interface. Make sure that the step low active is enabled if the pin is connected to the CP- (PUL-, or STEP-) and the 5v is connected to the CP+ (PUL+ or STEP?+) at the driver.

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