Centroid Community CNC Support Forum

I've Dubble checked all connections to be correct. but cannot get the charge pump to go from red to green when e-stop is triggered. with the charge pump on the G540 off it works just fine. Do I need the charge pump? I think to get it working must be in the settings.

CHARGE PUMP: The G540 is equipped with a charge pump (watchdog timer) that disables the drive without a 10 kHz signal on pin 16 of the DB25 port. You can enable this by reversing what was done in STEP 3 and making sure that your parallel port is set to EPP mode. To do this, go into BIOS and set your parallel port to either “EPP” or “Send/Receive”; most parallel cards are set to ECP or “Send Only” by default.

In the config wizard there is a formula under -advanced hardware-,-charge pump- to set the kHz. I don't understand the math to come up with 10 kHz

Can you post a fresh report?

Is the charge pump assigned on output 3?

Charge pump specifically needs to be assigned to output 3 in the wizard which is pin 16 on the DB 25

yes...in the output definitions assigned to OUT3 (pin 16 B25)
input definitions, IN 8 e-stop NC, IN 5 drive ok NC (pin 15 DB25)
I think I need to set the kHz for the charge pump, in the example 92=12.500Hz - so? __ =10,000Hz

Dragonbitscnc wrote: ↑Thu Nov 21, 2024 2:47 pm yes...in the output definitions assigned to OUT3 (pin 16 B25)
input definitions, IN 8 e-stop NC, IN 5 drive ok NC (pin 15 DB25)
I think I need to set the kHz for the charge pump, in the example 92=12.500Hz - so? __ =10,000Hz

Try 120 for the divider value.

Bingo... that worked red led switches to green when cnc 12 starts then back to red when cnc 12 shutdown

Thank You... Now onto RC Snubber's

Ensure that the correct kHz value is enabled in the settings and set the parallel port to EPP mode to make the charge pump work properly.

Since there is no parallel port involved, it's going to be a little tough to set it to enhanced mode.