Messages

1

General Mach Discussion / Re: Parallel port confirmations

« on: January 29, 2017, 07:17:13 AM »

Hi Joe,

I'm running a Dell Optiplex 755 with Windows XP Pro 32 bit and a CNCDrive HDBB2 break out board;

http://www.cncdrive.com/downloads/HDBB2_manual.pdf

It doesn't actually say whether the board supports 3.3v lpt ports in the manual. Like I say though I am able to activate outputs on the BOB. The only thing I'm unsure is, is the charge pump.

2

General Mach Discussion / Parallel port confirmations

« on: January 28, 2017, 12:11:12 PM »

Hi all,

I'm currently configuring Mach3 to run my HDBB2, DG4S-08020 servo drives and ENI-1024 encoders.

I have a couple of questions regarding the parallel port outputs:

1. When testing the outputs from the LPT / parallel port I'm getting a 'high' of 3.4v and a 'low' of 0v. Is this correct? LPT is set to run in EPP mode with DMA3 selected in Bios. My BOB is TTL level and I can activate output relays connected to this.

2. With charge pump enabled on Pin 14, using a multimeter to test voltage output I get 1.7 - 2.2 volts depending. I know its difficult to read the CP output this way as its a 12.5 khz frequency, but does this sound roughly right and will it power the CP circuit on the HDBB2?

Thanks,
Jim