Official Luthiers Forum!

Owned and operated by Lance Kragenbrink
It is currently Thu Nov 28, 2024 1:42 am


All times are UTC - 5 hours





Post new topic Reply to topic  [ 4 posts ] 
Author Message
 Post subject: Mach question.
PostPosted: Wed May 30, 2012 10:57 pm 
Offline
Mahogany
Mahogany

Joined: Tue Oct 14, 2008 9:38 pm
Posts: 79
Location: Peters Creek,Alaska
Wondering the order or how one would go about stopping a machining program in Mach, checking zero or to move the gantry to any location for that matter then restart from the arbitrary or zero location and not lose program position. With nothing on the table I have run a program and used stop, go to zero, cycle start. This is not working as the program is losing position.

I am running a program where everything is off by about an eighth of an inch perfectly, so I am trying to check zero between finish,rough, etc..... to figure this out.
Any information is much appreciated.


Top
 Profile  
 
 Post subject: Re: Mach question.
PostPosted: Thu May 31, 2012 2:27 am 
Offline
Mahogany
Mahogany

Joined: Tue Oct 14, 2008 9:38 pm
Posts: 79
Location: Peters Creek,Alaska
I should also say that when the program loses position, "go to zero" is still perfect.


Top
 Profile  
 
 Post subject: Re: Mach question.
PostPosted: Thu May 31, 2012 7:12 am 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Thu Jun 12, 2008 6:59 am
Posts: 1964
Location: Rochester Michigan
M00 - Program stop. You can insert that into your G-code in the spot where you'd like to stop. I'd recommend doing it after a z-retract of some sort or, you can write in a simple z-retract line on your own. If you stop the spindle manually, remember to turn it back on again before you hit cycle start!

Pressing the stop button on Mach causes lost steps if the machine is running at any reasonable speed because Mach 3 just stops the pulse stream, no deceleration. If you want to stop in the middle of a program in an un-planned sort of way, Feed Hold is what you want to use. It will stop the machine following the acceleration limits set in the motor tuning screen. Cycle start will pick up where you left off.

BTW as you can probably guess, the pucker factor is quite high the first time you feed hold, move the spindle out of the way and then continue....just don't forget to turn on the spindle! One day when I walked into the lab and found that my fret slot bit had broken about half way through a fretboard. I found the appropriate line of code, put in a new bit, fired up the spindle and hit "run from here". I about crapped myself when the machine shot over and dropped into the fret slot at 400ipm+ but, everything worked out fine. Take your time, double check.

_________________
http://www.birkonium.com CNC Products for Luthiers
http://banduramaker.blogspot.com


Top
 Profile  
 
 Post subject: Re: Mach question.
PostPosted: Thu May 31, 2012 8:54 am 
Offline
Mahogany
Mahogany

Joined: Tue Oct 14, 2008 9:38 pm
Posts: 79
Location: Peters Creek,Alaska
Thanks very much for the information.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 19 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group
phpBB customization services by 2by2host.com