New Home › Forum › LowRider › Troubleshooting – LowRider › New problems on my zaxis
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August 6, 2019 at 3:48 pm #108646
I’m still having problems with my zaxis, so I took a video to show what’s happening.
First off, my z axis is working perfectly when I control it manually. Whether I do it through repetier or with the LCD board, both motors work fine. All axis work fine, in fact.
But when I run an actual cnc program and all axis are moving, that seems to be when things get messed up. In the video you can hear the grinding sound. The router is off so it’s otherwise quiet.
By the way, when I disconnect and power down the motors, its very easy to twist the screw to move the axis up and down so its not super tight. And as I mentioned, everything works fine when I control manually.
Any ideas? I’m at a loss for ideas right now.
August 6, 2019 at 6:32 pm #108676Can you post the first hundred or so lines of your gcode? Not sure what I’m looking for but a few possibilities can be eliminated…
August 6, 2019 at 7:07 pm #108679Yes, here are the first 200 lines. By the way, I just ran it again from an SD Card to eliminate my laptop and Repetier from the equation, and the problem still remains…
;Project dog5
;Created by Estlcam version 11 build 11.113
;Machining time about 00:01:24 hoursG90
M03 S24000
G00 X0.0000 Y0.0000 Z0.0000 F2100
G00 Z2.0000 F480;No. 1: Part 1
G00 X1.8244 Y90.4306 F2100
G00 Z0.5000 F480
G01 Z6.0000 F180 S24000
G03 X1.5319 Y86.8523 I23.8813 J3.7529 F900
G01 X1.5425 Y86.0539 F900
G01 X1.5458 Y85.9715 F900
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G01 X3.7843 Y76.2209 F900
G01 X3.9495 Y75.8730 F900
G01 X4.1491 Y75.4824 F900
G02 X6.2930 Y71.3177 I58.4946 J32.7454 F900
G02 X6.7844 Y69.5072 I3.7290 J1.9841 F900
G02 X6.0965 Y65.2113 I10.5272 J0.5172 F900
G03 X3.4644 Y56.2985 I54.5296 J20.9485 F900
G03 X2.8089 Y50.4631 I29.8271 J6.3049 F900
G01 X2.8138 Y49.7793 F900
G01 X2.8435 Y49.0404 F900
G01 X2.8987 Y48.3178 F900
G01 X2.9069 Y48.2377 F900
G03 X3.5430 Y45.0004 I20.8792 J2.4216 F900
G03 X5.6893 Y38.1242 I87.8849 J23.6590 F900
G02 X6.7388 Y34.2406 I22.6301 J8.1991 F900
G02 X6.8690 Y30.0524 I18.8928 J2.6834 F900
G02 X5.4462 Y27.6184 I3.1700 J0.2203 F900
G02 X2.8168 Y26.0770 I10.8061 J15.4194 F900
G03 X0.1565 Y24.0003 I5.4978 J11.0385 F900
G03 X1.5860 Y20.9378 I2.9832 J3.2573 F900
G01 X1.5850 Y20.7791 F900
G03 X1.5571 Y20.5109 I2.6650 J0.1417 F900
G03 X0.5725 Y17.7227 I13.4181 J3.1703 F900
G02 X1.1920 Y12.7802 I33.8917 J14.8859 F900
G02 X1.4600 Y11.8196 I41.2637 J12.0295 F900
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G01 X2.9430 Y7.0156 F900
G01 X3.2013 Y6.4132 F900
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G01 X4.0751 Y4.7999 F900
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G01 X5.6538 Y2.9706 F900
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G01 X6.5447 Y2.2832 F900
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G01 X7.4372 Y1.7355 F900
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G01 X7.9621 Y1.4592 F900
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G01 X8.5908 Y1.1609 F900
G01 X9.2627 Y0.8754 F900
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G01 X10.0458 Y0.5877 F900
G01 X10.1407 Y0.5564 F900
G01 X10.8400 Y0.3407 F900
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G01 X11.6419 Y0.1337 F900
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G01 X12.4487 Y0.0339 F900
G01 X12.5417 Y0.0503 F900
G01 X13.2572 Y0.1626 F900
G01 X13.3503 Y0.1745 F900
G01 X14.0645 Y0.2528 F900
G01 X14.1583 Y0.2604 F900
G01 X14.8679 Y0.3049 F900
G01 X14.9627 Y0.3081 F900
G01 X15.6643 Y0.3189 F900
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G01 X20.1457 Y0.4050 F900
G01 X20.2647 Y0.4481 F900
G01 X20.8178 Y0.6664 F900
G01 X20.9422 Y0.7216 F900
G01 X21.4610 Y0.9715 F900
G01 X21.5905 Y1.0414 F900
G01 X22.0717 Y1.3228 F900
G01 X22.2053 Y1.4101 F900
G01 X22.6458 Y1.7226 F900
G01 X22.7815 Y1.8304 F900
G01 X23.1781 Y2.1739 F900
G02 X25.4391 Y3.4481 I4.9681 J6.1729 F900
G01 X25.8973 Y3.6297 F900
G01 X25.9793 Y3.6647 F900
G01 X26.4154 Y3.8599 F900
G01 X26.4981 Y3.8997 F900
G01 X26.9113 Y4.1076 F900
G01 X26.9949 Y4.1527 F900
G01 X27.3847 Y4.3725 F900
G01 X27.4690 Y4.4234 F900
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G01 X27.9198 Y4.7116 F900
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G01 X28.3463 Y5.0172 F900
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G01 X29.0374 Y5.5986 F900
G01 X29.1230 Y5.6808 F900
G03 X30.9522 Y9.0172 I3.9244 J4.3212 F900
G03 X29.5170 Y13.1683 I5.0285 J0.5851 F900
G03 X26.6852 Y15.0718 I6.1784 J6.1332 F900
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G01 X42.5773 Y39.8578 F900
G01 X42.6895 Y39.8045 F900
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G01 X45.9031 Y38.3112 F900
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G01 X80.5265 Y3.6126 F900
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G01 X81.3140 Y2.0561 F900
G01 X81.3808 Y1.9502 F900
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G01 X84.8015 Y0.7056 F900
G01 X85.2739 Y0.8757 F900
G01 X85.3622 Y0.9046 F900
G01 X85.7204 Y1.0146 F900
G01 X85.8270 Y1.0435 F900
G01 X86.2304 Y1.1426 F900
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G01 X105.2161 Y4.7452 F900
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G01 X105.3323 Y12.9972 F900August 6, 2019 at 7:52 pm #108683It looks like youve done everything right as far as software. Try decreasing the z rapid feed rate to 180 instead of 480. I am guessing this will get you up and going at least, and your manual jog will work like your cam job.
It looks like Estlcam uses the rapid feedrate to go up, and the plunge feedrate to go down, which is reasonable. After all, going up is not cutting and going down is potentially cutting. But going up you are going against gravity so you need more torque. Slowing down should help.
BUT at 480 you should still have plenty of torque, so something is still wrong and needs to be fixed. If you are borderline when raising the tool then for a long job if you could lose some steps and best case you only ruin your work.
Maybe with motors energized, try turning the coupler with your hand and see if you can skip steps with your hand. If so, see if both sides feel equal. You could use a multimeter to measure the current through each winding of each motor, but setting that up is quite a hassle.
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August 6, 2019 at 8:06 pm #108688Thanks, I’ll try those things in the morning. I was thinking that today I had added an aluminum beam for wire management, as well as connected shopvac hose, so I’ve recently added some additional weight. If I’m srtessing the torque with my feed rate, that additional weight certainly won’t help.
By the way, I can definitely skip steps with my hand by holding the coupler. I tried that today, but I wasn’t sure if that’s normal. Is that a bad sign?
Thanks again!
August 7, 2019 at 4:10 am #108725Jamie – thank you so much! I woke up early this morning anxious to try slowing down the z rapid feed rate, but lo and behold when I went into my estlcam settings I found that my previous settings had disappeared. It seems that my z feedrate was trying to run much faster than 480 in Marlin. So I set it back to 480 and everything ran smooth as a baby’s butt.
I was so focused on mechanical and electrical, I completely missed the obvious. This was good though, I learned a lot more about the software, firmware, and gcode along the way.
This morning im leaving on a short family vacation and it’ll be much more pleasant knowing I’ve got a working machine waiting for me when I get back!

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