Sporadic Erroneous Automatic Toolchange Behaviour
- Bassblaster
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02 May 2024 20:02 #299593
by Bassblaster
Sporadic Erroneous Automatic Toolchange Behaviour was created by Bassblaster
Hi Guys,
I have some trouble with my automatic revolver toolchanger on my lathe. If I set something like M6 T3 and then M6 T1 in MDI it should swich from tool 3 to tool 1. This works 80% of the time. However, randomly, sometimes it just doesn't move but still thinks that it changed the tool. However in my variable #4999 the tool has not been updated correctly in this erroneous case. I think that it maybe just somehow aborts in the middle of the change subroutine before moving or saving the tool, but I get no error messages or so... Also it actually never displays the current tool offset in Gmoccapy, but that is not my biggest problem.
For the toolchanger I just did a simple remap with this code:
REMAP = M6 modalgroup=6 ngc=sub_progs/toolchange
Has anybody encountered similar problems or has an idea? I tried updating and writing a new hal and ini, but that changed nothing...
I have some trouble with my automatic revolver toolchanger on my lathe. If I set something like M6 T3 and then M6 T1 in MDI it should swich from tool 3 to tool 1. This works 80% of the time. However, randomly, sometimes it just doesn't move but still thinks that it changed the tool. However in my variable #4999 the tool has not been updated correctly in this erroneous case. I think that it maybe just somehow aborts in the middle of the change subroutine before moving or saving the tool, but I get no error messages or so... Also it actually never displays the current tool offset in Gmoccapy, but that is not my biggest problem.
For the toolchanger I just did a simple remap with this code:
REMAP = M6 modalgroup=6 ngc=sub_progs/toolchange
o<sub_progs/toolchange> sub
#4001 = 1 (distance to travel per tool pocket)
#4002 = 0 (calculated distance to travel)
#4003 = 0.4 (distance to lock turret)
#4004 = 0.2 (Aditional tolerance to clear the rachet)
M61 Q#4999 (stores the tool in spindle)
o100 if [#<_selected_pocket> GT 7]
(DEBUG,STOP: Werkzeugtasche größer 7!)
(DEBUG,Überprüfe eingegebene Tasche in der Werkzeugtabelle, maximal 7)
M0
o100 endif
o101 if [#<_selected_tool> EQ #<_current_tool>]
(DEBUG,Werkzeug bereits eingewechselt)
o101 elseif [#<_selected_pocket> GT #<_current_pocket>]
#4002 = [[#<_selected_pocket> - #<_current_pocket> ] * #4001]
G91
G00 B-#4002
G00 B-#4004
G00 B#4003
M6 G43
G90
o101 else
#4002 = [[#<_current_pocket> - #<_selected_pocket> ] * #4001]
G91
G00 B-[[8*#4001]-#4002]
G00 B-#4004
G00 B#4003
M6 G43
G90
o101 endif
#4999 = #<_current_tool>
o<sub_progs/toolchange> endsub
m2Has anybody encountered similar problems or has an idea? I tried updating and writing a new hal and ini, but that changed nothing...
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- andypugh
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04 May 2024 09:53 #299708
by andypugh
Replied by andypugh on topic Sporadic Erroneous Automatic Toolchange Behaviour
I don't advocate using a B axis for a toolchanger, I feel there is a danger of getting out of synch.
That said, is it possible that the B axis is configured to take the shortest path (WRAPPED_ROTARY) or that the G-code is setting the mode to incremental?
Your G-code sub probably needs to ensure that the mode is set to absolute, and then restore it after the change, even if this is not the problem.
That said, is it possible that the B axis is configured to take the shortest path (WRAPPED_ROTARY) or that the G-code is setting the mode to incremental?
Your G-code sub probably needs to ensure that the mode is set to absolute, and then restore it after the change, even if this is not the problem.
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- Bassblaster
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05 May 2024 15:06 #299815
by Bassblaster
Replied by Bassblaster on topic Sporadic Erroneous Automatic Toolchange Behaviour
Hmm, can you elaborate on what getting out of sync means? It is not set to shortest path, but I do use G91 for the movement of the revolver itself. In the end of the programm I set G90 again, but it is not executed in the erroneous case...
If not by a b-axis, then what is the common way to drive a stepper motor on the revolver? I thought this is necessary in order to use one of the pwmgen's on my mesa 7i96.
If not by a b-axis, then what is the common way to drive a stepper motor on the revolver? I thought this is necessary in order to use one of the pwmgen's on my mesa 7i96.
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