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Messages - KnuckleDragger

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General Mach Discussion / Re: Homing?Limits
« on: May 22, 2020, 02:39:28 PM »
Glad to see you got it fixed. Just had a USB keyboard pull a real boner. Hit any key get the reference all home command. The machine takes off and homes, ruin a small job. Thought it was Mach 3 but noticed the shift lock light would not function, swapped junk keyboard for Logitech, and back on track. 

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General Mach Discussion / Re: Homing?Limits
« on: May 18, 2020, 07:06:44 PM »
I wonder if you considered soft limits. They have saved my butt so many times! Every time I ignored the warning I watched my job go to hell!!!

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General Mach Discussion / Re: problems with machining holes and Z axis
« on: October 14, 2017, 11:05:47 AM »
ZXR,
One thing, draw a straight line of a length you can measure with a dial caliper do so in each direction x and y. This will tell you if you stepper motors are set to the correct steps/rev.  If you are experiencing errors on all axes then I strongly suggest you look at the square of your CNC. If for any reason it's not square you'll never fix the symptom. One good test is to cut or draw a square of equal sides say 10" by 10" if your cnc can handle that size. Then measure all sides they should be within specs. Another way is to cut 4 squares whose sides can be measured by a dial caliper. Let's say 4" by 4". These sides should be almost exactly the same for a small 4" square. Cut or draw if you have an accurate pen mount,  these 4 squares at each extreme corner of the cnc. This will test for squareness. Additionally, if you're driving the steppers to fast or too slow you'll get errors. I know this is a lot, but eliminating each possible cause help you narrow down the cause. Sadly my cnc was poorly designed and would not stay square. I also had flex in the spindle mount, there is no substitute for metal in an cnc frame trust me on this.

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I had the same problems with a USB-CNC controller and realized that I had used a cheap USB cable by mistake so I swapped it for one of my shielded USB cables and all is well. I will admit that I am so used to MACH 3 I have gone back to the parallel cable set up.

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General Mach Discussion / Re: problems with machining holes and Z axis
« on: October 11, 2017, 10:20:31 AM »
zxrjohn14,
I noticed in your post you said: "The holes are still off center,". You seem to be saying the Z axis is not moving up and down properly. But if I understand your statement 'off center' that would mean a problem with the x and y movement would it not? Do you mean to say the holes are not drilled to the correct depth?  I  know just enough about Mach3 to be dangerous so just asking. The Z axis gives me fits so I have a faulty understanding at best of the Z and safe limits.
I use Vcarve Pro 9 and Mach3 running on an old XP machine. 

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