Setting up and tuning dual-motor X axis

[lucan07]

I am running a DB25 setup just a cheap 5 axis chinese bob and 4 DM542 drivers with 425 oz 23's, they are tuned identically and synced in mach3 it keeps them synced and I have had no problems at all losing steps. Only on initial setup of slaving one hiccup but that should be done before connecting drive screws so my own silly fault, if you try this ensure your ready with the E stop. I have a park routine away from homing where I can use a straight edge to check, and at first checked slave alignment regularly but now rarely as I have never found any slippage.

[Neale]

I bought the EM806 digital drivers as a modern alternative to the older M542 analogue drivers to make use of the digital drivers' features, mainly resonance control and stall detection, which is what my question was asking about. In brief, in a dual-axis setup, do you disconnect one ball nut while tuning the other axis, just take the target motor's drive belt off, or what? And should the driver's fault signal go back to the motion controller (quick response but relies on motion controller firmware to stop machine) or safety relay which will respond slightly more slowly but more reliably?

[lucan07]

A quick scan through the software manual for EM drives page 18 step 2 states among other things that
"It is very important to make the Phase and Amplitude phase adjustments at the proper test speeds with an unloaded motor."

I could find no information particular to slaving, would therefore assume that tuning a slave motor different to its master would be counter productive reading Mach3 documentation states slave should be tuned identically.

Also (sorry if this is advertising for the opposition) but just saw this post on another forum and might be place to get best information.

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