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#1
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Help please. Consistently looses steps in X.
After cutting my aztec calendar I decided to do some checking and not sure if ths occured after cutting the calendar or has always been there.
Just engraving a rectangle which is meant to be with corners at absolute points (7.5,7.5), (7.5,52.5), (92.5.52.5) and (92.5,7.5). I am using Mach3 and a ethernet smooth stepper. Points on the DRO of Mach 3 look correct but when I run the file. I cut what you see in the picture. Steps taken are 1. Ref all home (using proximity switches) 2. Go to Zero indicated by the end of the ruler in the picture. 3. Run the file generated by Aspire N110G00G21G17G90G40G49G80 N120G71G91.1 N130T6M06 N140 (V-Bit {60 deg 32 mm} ) N150G00G43Z23.999H6 N160S16000M03 N170(Toolpath:- Profile 1) N180() N190G94 N200X0.000Y0.000F900.0 N210G00X7.500Y7.500Z10.000 N220G00Z5.999 N230G1Z-1.50F900.0 N240G1Y52.500F900.0 N250G1X92.500 N260G1Y7.500 N270G1X7.500 Now if I repeat this complete set of steps the tool will travel the exact same path each time. If however I simply rerun the file the tool will cut the complete rectangle only. i.e. Like if home has moved. My original thought was lost steps on X axis (slaved) but it seems too consistent too be that. I would expect the number of steps lost would not be the same each time. Thoughts please would be appreciated. |
#2
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woops
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#3
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The problem might be the G91.1
Replace the safe start blocks with N10 G40G17G80G49 N20 T1 M6 N30 G90G54 N40 M3 N50 G0X? Y? End of program to read Z0. M5 G04 P1000 N45360 G0Z50.000 N45370 G49H0 N45380 M30 If the Aztec cut ok and rerunning your test program with steps 1,2 and 3 works it is unlikely it is lost steps. |
#4
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Found the problem the grub screw came loose in the pinions on both A and X axis (A slaved to X). Time for some loctite.
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#5
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Looks like your pinion holes are machined too loose. Loose screw should not cause that kind of problems. Bot you are on right way, loctite threadlocker is on CNC nessesary. Vibration ....
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#6
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Something simple.
Glad you got it sorted. |
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