Fine tuning the machine.

[btreichel]

have you set your work zero?

[Bruce]

If you're getting erratic movement from the Z axis you may be getting electrical noise from the router. Try pulling the power cord out of the drag chain and run it away from the other control wiring. Maybe plug it into a different outlet.

[paul061513]

Thanks Bruce, thanks btreichel...."Z" was zeroed and the router wire is suspended form overhead, but...

After doing my normal shut everything down, unplug, restart, re-zero....IT WORKED!!!!! Photo attached....I had to burn the hangers off after trying to use the Dremel to remove them; all in all, I suppose not to too bad for a first run. Going to try it on a piece or cherry next. I still need to get the homing plate to work correctly, it would save a heck of a lot of time.



Lessons learned:

1. Soft wood sucks for engraving; laser engraving may be better (my next quest to get set up);

2. No more pocket cuts on soft wood, even when done with an end-mill at 20% step over still leaves lines that need sanded.

3. I need to dig out the rest of my router bits, cause this could get fun!!!! LOL

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[paul061513]

So I have everything going well so it would have seemed. My ‘Y’ axis motors are now skipping. They do not move in sync at about a half second delay on the right side to the left. I checked all the hardware, nothing is loose and when I cycle through by hand everything is moving smoothly. I’m going to try send a video where you can hear the ‘Y’ motors clunking. I may have to email to the support address if it doesn’t upload here.

[btreichel]

Do you have the 4th axis? I once unplugged my right y axis and mistakenly plugged it into my 'a' axis. Caused me to think they were out of sync. Found out thats not possible because they are driven off of the same signal. Check your y pinion pressure's into the rack. That can cause what you are describing.

[Bruce]

I agree with btreichel, If you are experiencing "motor clunking" they are losing step position. Loosening the rack against the pinion gear should help. Make sure the M6 washer is installed as a spacer between the motor mount and gantry also.

[paul061513]

Apr 25, 2020 23:28:57 GMT btreichel said:

Do you have the 4th axis? I once unplugged my right y axis and mistakenly plugged it into my 'a' axis. Caused me to think they were out of sync. Found out thats not possible because they are driven off of the same signal. Check your y pinion pressure's into the rack. That can cause what you are describing.

I would not have expected thing to work loosed after one project, lesson learned. Even though the screws were still tight, they had slipped I guess. Working great now.... thanks.

Figured i should give an update and say thanks again for the tips. This was the same sign I first ran on a piece of pine, it looks  so much better on cherry It's not perfect, but I'm learning...LOL

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[jpjavery]

Tried doing this today on my Mega V XL, but UGS told me the settings were locked and to contact MillRight. I havent found a way to unlock them yet, and help is appreciated.

These are the numbers I got, with the current $100 and $101 = 57.29 in the current settings

X Expected Distance 100.00
X Actual Distance 98.91
Programmed X steps/mm 57.29
X Percent Error -1.09%
Corrected X steps/mm 57.912 Type in $100=57.912 in the command line to set this


Y Expected Distance 100.00
Y Actual Distance 100.27
Programmed Y steps/mm 57.29
Y Percent Error 0.27%
Corrected Y steps/mm 57.135 Type in $101=57.135 in the command line to set this

[cutcutcut]

Mega V (36x36) here.

I’m new and a little dumb so forgive me. I have been looking for a way to PHYSICALLY square the X-axis to the t-slots. Mine are off by over 1/4” across the table. I done see an assembly manual for this model that addresses calibrating, only the assembly videos.

The .pdf referring to cutting the 100mmsq and measuring is a software calibration to correct this? And there is not also a physical calibration to perform here? I have been tuning my rolling wheels, FYI.

Thanks, just trying to grasp the concept.
Bucky

[jtb]

I found it difficult to stabilize a dial indicator to check my x and y axis movement. I came up with this 3d printed mount for the Mega V extrusions which worked well for me. The lug of the indicator slides into the pocket of the holder and the holder snaps over the extrusion. (place the bottom of the holder on the extrusion and snap the top on last) This was printed in PETG.
(When I imported the phots they get rotated. Couldn't figure out how to fix that)

 

gauge holder10 v1.stl (8.96 KB)

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[Bruce]

jtb, what are you checking here? Are you checking the position repeatability or position accuracy with this gauge holder?

[jtb]

Step calibration in UGS.