I was told to ask Mesa 5/6i25 questions here.

Clive thanks for your suggestion.

My garage is about 250ft walking from my house or 200ft in a bee-line from the nearest LAN-jack in my house. BUT, my house is partially earth sheltered (underground; we are off-grid) and my garage is too (we live in the desert in the boonies). There is a huge amount of earth between the two and I doubt that wifi would penetrate. I have wifi in my house and routinely use it with my cellphone. My cellphone cannot "see" the wifi if from the garage. I have a skylight/window that I could remove a screen for a temporary cat5 (just over 220ft Lan_jack to cnc PC). That would probably work as a temporary thing. It would be even more work to remove the PC_portion from the cnc machine and bring it into the house and then it would not have any benefit of being connected to the machine. I could envision possibly having to carry that PC back and forth a number of times. I could also add an outside wifi antenna (from house) and another above the garage then I could flash DD-WRT into some old Cisco routers I have and set them to be a wireless bridge without disturbing the wifi in my house. But that's a lot to do too.

I was just simply trying to do 2 things:

1.) bring it to the attention of forum post responders that there seemed ( to me, a Linux dummy) to be a lack of info about doing various things without any network (e.g. with a USB stick only). It seemed to me that there was usually an assumed network connection.

2.) find out HOW TO do an upgrade (2.5 to 2.6 or 2.6 to 2.7) specifically without a network connection (e.g. with a USB stick).

While there were a number of suggestions, they were all in the vein of 'get it connected to the internet' THEN just follow the directions at the LinuxCNC.org website. I appreciate that those directions are there, but they just don't fit my circumstanced. I feel like a square peg trying to fit a round hole. Being very frustrated, I finally said f@#! it and with some efforts did a full iso install (as it now sits).

While I really do appreciate the good intentions of you and those posters, I was holding out for an answer to my original question about how to do it without a net connection. If anyone posted that and I just missed it then I apologize. I just didn't see any. Clearly I ruffled some feathers, perhaps too much. I'll just back off now.

Thanks anyway.

Ok well you are in an extreme situation as you say a wifi bridge is easy to set up I have done it over several Kmtrs .

Just a thought (it might work) have you tried a homeplug system if the two building are on the same phase it might just work.

www.solwise.co.uk/net-powerline-real-world-performance.htm

skyrider wrote: My garage is about 250ft walking from my house or 200ft in a bee-line from the nearest LAN-jack in my house.

If the house and workshop are on the same electric supply you might be able to link them with Powerline Ethernet.

It is working well for me.

en.wikipedia.org/wiki/Power-line_communication

PCW wrote:
3. When a hardware steggen is used, no basethread is needed, only a servo thread
depending on how the stepgen is setup, around 50 to 500 usec of jitter are tolerable in the servo thread
maximum step rate on a 5I25 is about 8 MHz

Hi Peter

I have bought 1x 7i92H and 1 x 5i25 from mesa and need to run with step rate 8Mhz. both of board can run with 8Mhz step rate? And how to config boards run at 8Mhz?

Thanks

It shouldn't take any configuration to step at the max step rate. It should just happen when the velocity command and the step scale require it.

Yes, nothing special required, but you do need to set the step length and step space
times very short (50 ns or so) to do this. Its probably better to use quadrature mode if your
drives can accept this, as this would double the pulse widths. A 7I92 would do better
in terms of signal fidelity at 8 MHz since it has a 100 MHz base clock instead of 33.33 MHz