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Ok, good to know about the recommendation on drives with local rotary encoders.

For linear forcers or brushless DC motors without local encoders, how should the independent linear encoder be wired, with respect to the motor controller and/or LinuxCNC+Mesa?

I do not recommend using the drives local rotary encoder as direct feedback to LinuxCNC.
It's possible but does not really confer any advantages. 

A system with a step/dir servo drive and an independent linear scale does have some advantages
in improving accuracy.

 

Do you mean you would not use step/dir drives with a single encoder at all with LinuxCNC, or that you do not recommend wiring a single encoder to both the motor control and LinuxCNC?

In this case, the drive is a linear forcer, so there is no rotary encoder and just one separate linear encoder. I am trying to decide how to wire it up.

I suggest adding a change, when the tooltable program starts, it makes a backup file of the main one, if the program starts and the file is damaged, it suggests opening the backup file

I answered on the github issue tracker, but you set number of steps with normal "setp" in the hal file.
The new Enable PDO/Pin should be connected to net x-enable, that way it only generates steps when the machine is "on".
Like soYou also have MaxAcceleration as a new PDO and the guideline is some 25% higher than ACCELERATION in the ini file.

if I'm working with tooltable, minimized the window and need to finish work, then I turn off the computer and tollyable file is corrupt

I understand this, I'm trying to explain something else. If the tooltable program did not complete correctly exit, then the tool file is corrupted. There is no backup. Backups must be made manually......

In general I would not use a step/dir drive with encoder feedback to LinuxCNC unless
this is a dual feedback system, that is for example a step/dir drive with local rotary
encoder and a separate linear encoder fed back to LinuxCNC. This way the high bandwidth
motor control loop is run locally and the lower bandwidth but higher high accuracy control
loop is run in LinuxCNC.

There are also noise issues when feeding drive connected encoders to LinuxCNC as the ground
reference of those encoders is often the negative motor power line. (At least in small DC powered drives)