Hi all
New to the thread and wishing I'd read this before buying one of these cards ...
I was using one of the AKZ250 USB controllers with no issues so I thought I'd upgrade to an ethernet based NVEM V2 to tidy up my setup.
I've got it running but there are a couple of things that I've noticed that may help others make a more informed choice regarding these controllers :-
1> The controller doesn't get an IP address via DHCP - The manual says the subnet is 192.168.31.xxx - fortunately I run a managed switch which tells me that the IP of the controller is actually 192.168.1.100 so I added a secondary IP address to the computer interface in the correct subnet and all's good.
2> Occasionally, the computer and controller loose their connection - I've disabled link speed auto negotiation on my switch which seems to have fixed this one for now.
3> The analog output for the spindle is very slow to respond - the built in filter response is shocking, taking upwards of 5 seconds to spin up to speed. The rather poorly written manual claims that this can be changed from the default analog output to PWM but fails to say how - any help here would be appreciated
4> The NVEM also reports finishing a move before it actually has and seems like there are a few moves buffered - not a big deal during normal operation but it's a major issue when trying to AutoZero a tool as the controllers command position has no relation to it's actual position - for example, if you use a script to find the probe, zero the DRO and move away from the probe, the moves are buffered and the DRO is reset before the first move has completed resulting in the zero point being incorrect. I've got round this by using a dwell command after the moves to let the physical machine catch up and it works pretty well.
The bigger issue with this one is that when you use the Mach3 stop button to halt a run, the spindle is shut off before the buffered moves have finished so you end up with a stationary tool being dragged across the workpiece!
Hope someone finds this information useful - has anyone else experienced these issues and if so, how did you fix them?
Rgds,