Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: FarReachFarm on June 26, 2019, 03:21:31 AM
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I just got one of the those CNCEST 6040 cheap Chinese engravers off ebay. I added a wireless pendant is all so far. I'm actually fairly impressed with it. 1.5kw water cooled spindle etc. I've used Mach3 with a lot of other machines that I've retro-fitted. But this problem has me stumped.
I calibrated the machine's "steps per unit" setting (factory 320=x, 320=y 400=z) using the tool in the setting tab. Came out close to factory.
When I test movement accuracy on all axis it's very good. So it seems the steps are correct.
So I set the home, work offsets and tool offsets correctly. Then when I move off 0,0,0 to say 100,200,300, and hit GOTO ZERO (not machine coordinates) with tool 5 a 1.7mm endmill, (or any tool), the machine moved to the Z and Y zero position correctly. But the X is off by -0.7mm... which sounds like 1/2 of a the tool diameter. However, if I repeat the process of "move off zero" and "goto zero", the X position is even further off between -0.4 and -0.8mm each time and it grows.
Yet, Z and Y are correct! So why isn't X? And why does it get progressively worse. Yet when I calibrate it again, the resulting steps per unit do not change and moves are perfect.
What is that can cause just the X to be off when moving to zero only? Could it be related to cutter compensation?
I verified all the factory settings in the controller are correct.
I had no such issues with the Bridgeport Discovery retrofit I did two years ago.
Thanks in advance!
Scott
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RESOLVED! So I did some testing.... using the pendant to move position on the Z was also changing the X!!!!!!!
I got the 6 axis SHINA via Amazon. "SHINA New CNC 6 Axis Wireless Mach3 MPG Pendant CNC Handwheel Manual Pulse Generator"
I loaded the standard macros etc and it seemed to work pretty good. But we could not get X to GOTO Zero at the same point every time. Then I finnally noticed that the X moved a little everytime the Z moved!!!!! THe more the Z moved, a little tiny more the X would move! But only with the pendant. Moves with the soft-pendant were fix, as was the G-Code programs I ran.
SHINA REALLY!?!?!?!?! I paid $130 for a true-6 Axis Pendent and was super excited to get it. The last pendant I bought for my huge CNC was $1200 from the OEM and it wasn't as nice.
Anyway, I'll look at the macros and see what is going on, or return it to Amazon's seller for a refund.
Arg!
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Hi,
I have and like a VistaCNC P1A.
Craig
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How did you get the limits to work on the 6040?