#linuxcnc-devel Logs

Jun 23 2018

#linuxcnc-devel Calendar

01:56 PM skunkworks: sam?
02:20 PM pcw_home: seb deleted sam?!?
03:14 PM KimK: Yes, Seb deleted Sam, but Sam is in a git repo, so just back up one commit, and Sam will be back again!
03:20 PM hazzy-dev: Still feel bad for sam having to go thru all that ..
06:05 PM seb_kuzminsky: sam was/is an experiment i did - it's Stand-Alone Motion, in analogy with SAI, the Stand-Alone Interpreter
06:08 PM skunkworks: aww.. what a let down.. ;)
06:12 PM andypugh: I found out what my problem was yesterday
06:13 PM andypugh: The clue was when I 1) Found that setting NO_FORCE_HOMING bypassed the problem 2) Mentioned this fact to Chris
06:15 PM Tom_itx: :)
06:16 PM andypugh: (Reminder, GladeVCP action buttons were disabled after any MDI or auto move)
06:17 PM andypugh: It turns out that the GladeVCP MDI_Action handler checks that all axes are homed. But that breaks for a 2-joint XZ machine.
06:18 PM Tom_itx: like a lathe
06:18 PM andypugh: Yes. In fact, a lathe
06:19 PM andypugh: The error is checking (joint) homed status against (axis) axis_mask
06:25 PM andypugh: I have made a patch, but it might need a new test.
06:26 PM Tom_itx: can i use a much larger VFD with a smaller watt motor?
06:26 PM andypugh: Yes
06:26 PM Tom_itx: i'm wondering how they pair up
06:27 PM Tom_itx: are the output voltages adjustable or do you get one to match the motor voltage?
06:27 PM andypugh: VDF bigger than motor == good. Motor bigger than VFD == bad
06:27 PM Tom_itx: yeah i figured that
06:27 PM Tom_itx: just like anything else, it will draw what it needs
06:27 PM andypugh: You can normally set the current / power to anywhere between zero and max VFD rating
06:28 PM Tom_itx: if i'm not concerned about feedback can i use an AC servo on a VFD?
06:28 PM Tom_itx: ignoring the encoder
06:29 PM andypugh: I don’t know.
06:29 PM Tom_itx: just trying to figure out how to pair these things up
06:29 PM andypugh: I know that you can use the STMBL servo drive as a VFD
06:29 PM Tom_itx: not sure what that is
06:30 PM andypugh: And the {arker Unidrives will drive wither.
06:30 PM andypugh: (either)
06:30 PM andypugh: Parker
06:30 PM andypugh: rene-dev: Ping!
08:50 PM Tom_itx is now known as Tom_L