- Need Help!- Need Mach3 post for 4th axis
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Need Mach3 post for 4th axis
Hello, I am running BobCAD v30 and I am needing a Mach3 post for my 4th axis. The only post I see on BobCADs site is Mach3_OEM which I guess does not support the 4th axis as I get this message from BobCAD "Current toolpath is not for 4-axis machine. Posting process exception."
Has anyone got a post for me? Or can I modify the standard Mach3 post (if so how do I do that?)?
Thank You,
Eric
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Re: Need Mach3 post for 4th axis
Yes I do have the 4th axis standard and I switched post to the BC_4x and I am still having the same problem. I do have it set to 4 axis in my machine setup. I did try a program with the rotation around the X axis and it was able to be posted, but on my cnc router my 4th axis is on the Y axis and that is when I cannot get it to post.
What setting am I missing?
Thanks Rod for the help, do you have a little more?
Eric
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Re: Need Mach3 post for 4th axis
Hi Eric
You appear to be in "Inverse Time Mode" as there is a G93 at Line N55, the Line N50 has the G94 which is the "Units per Minute" mode so the feed is correct at F2 (I assume that is what you set).
If you want to change to all "Units per minute" mode then go the to line in your PP shown below and if it is not set like this then try changing it to the same
441. Multiaxis feed type (0=UPM 1=INV on all 2=INV on Rotary 3=INV on 4 and 5 Axis) ? 0
Here is a pretty good explanation of how the G93/G94 commands work, not mine I might add, somebody way smarter than me
Set Feed Rate Mode – (G93 and G94)
Set Feed Rate Mode (G93 and G94)
Two feed rate modes are recognized: units per minute and inverse time. Program G94 to start the units per minute mode. Program G93 to start the inverse time mode.
In units per minute feed rate mode, an F word (no, not that F word; we mean feedrate) is interpreted to mean the controlled point should move at a certain number of inches per minute, millimeters per minute, or degrees per minute, depending upon what length units are being used and which axis or axes are moving.
In inverse time feed rate mode, an F word means the move should be completed in one divided by the F number minutes. For example, if the F number is 2.0, the move should be completed in half a minute.
When the inverse time feed rate mode is active, an F word must appear on every line which has a G1, G2, or G3 motion, and an F word on a line that does not have G1, G2, or G3 is ignored. Being in inverse time feed rate mode does not affect G0 (rapid traverse) motions. It is an error if:
· inverse time feed rate mode is active and a line with G1, G2, or G3 (explicitly or implicitly) does not have an F word.
I do undestand why some one would have an "F" word for some of this multi axis stuff, maybe some folks could even be pushed to an "F****** S***" expletive
Hope it works for you, I don`t have anything more right now, run out of time, got chores to do to stay healthy !!!!!!
Regards
Rob
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Re: Need Mach3 post for 4th axis
Rob, well I just got a new computer over the weekend and loaded BobCAD v30, made the changes to the post and on the new computer it is posting the angle rotation correctly. So I don't know why it did not want to work right on my old computer. Well right now it is working!!!
Thank you again Rob for all your help, I would not have got it working without you.
Thanks again,
Eric
- Need Help!- Need Mach3 post for 4th axis
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