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Yes, you can use 7i76E with 7i84 with a cut in half LAN cable (see manual for wiring), and 7i85 with a IDC26 to DB25 cable (available on Mesa stores and even some older PC's have them, look for a parallel port on the back slots). BTW, 2 of 7i85 could be used as 7i76E has two IDC26 headers, or similar boards, and you can add more 7i84 or 7i79 or 7i71 or 7i72 to 7i85.

notJamesLee wrote:

Is that just a y thing?

Regarding tandem Y axis?
Yes it is, but it can be also X axis or Z or any axis that use 2 or more motors, they can not be jogged until the machine is homed to prevent bending the machine.
LinuxCNC will show a warning whenever you try to jog tandem axis, but it will not spin the motors, while single motor axis will jog.

Can those servos take step/dir signals?
Assuming yes, so consider them simple stepper drives.
If motors are not mounted on a machine, just enter some rough estimates in the wizard (you did not say it using parallel port or Mesa card, both can have DB25 connectors and uses BOB's) to get stuff moving, you can at any time make new configurations and have as many as you like/need.

Dave2024 wrote:

....Anyways my idea is if I could get a lesson on what's needed to make a readout like you've got and somehow program it so that if the load is too high it would alter the feed/speed so that a chip size of set value would never exceed the capabilities of the motor. That and another possible feature would be an estop trigger if the load was too high and RPM lower than a set threshold. Is any of this possible or am I just crazy?

I am sure LinuxCNC can adjust the feed rate depending on spindle load feedback so it slows down the feed if the spindle load exceeds the programmed value, some examples

For now yes that is correct. we have a branch we are working on with a database type tool table which will allow for many more functional options and usable tool parameters to be stored and called upon during subroutines. one of those parameters will be tool storage so it knows which tools are storable in the atc and which are not etc. there will be some really awesome updates coming with the tool database updates.