Yes, I found drilling a ‘home hole’ was useful. This is how I knew the co-ordinates had changed. When I moved to (0,100), it wasn’t at the hole.I did then move to the hole and re-home the machine. The problem I found was that parts cut at (-12.2, 43) weren’t exactly the same as parts cut at (0,100), even though those two co-ordinates were physically both at the home hole. Once I’d run automatic chain length calibration then (0,100) went back to the home hole and the parts were like the original ones cut at the home hole.
This slight difference in parts (25mm vertical thickness instead of 23mm) is why I’m cutting all the parts at the same position.
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Does the FW measure distances in mm or in some arbitrary “distance per encoder step” unit?
From @jetrock 's last post, where just changing the relative value of the coordinates of the home hole (even though the absolute location is the same) results in different sized cuts, this could be a floating point precision issue as well as read/write EEPROM issue.
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The machine measures in mm.
As far ad I know, Jetrock is using the stock sled/kinematics. We have lots of
known problems with that layout (see the accuracy page on the wiki)
he will need to go to triangular kinematics at some point.
But that’s not the problem he’s having with ‘home’ moving.
That’s either a bug, a shutdown problem, or he’s somehow hitting the button to
redefine where home is without realizing it.
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Not likely.
Two cuts…same exact physical location…same spindle speed, same feed
rate…but different dimensions of the resulting cut parts. Only
difference was using a relative coordinate offset in the calvulations.
That’s a calculation issue, not a kinematics issue.
dlang[1]
December 9
The machine measures in mm.
As far ad I know, Jetrock is using the stock sled/kinematics. We
have lots of> known problems with that layout (see the accuracy page on the wiki)> he will need to go to triangular kinematics at some point.
But that’s not the problem he’s having with ‘home’ moving.
That’s either a bug, a shutdown problem, or he’s somehow hitting the
button to> redefine where home is without realizing it.
Visit Topic[2] or reply to this email to respond.
In Reply To
ihabfahmy[3]
December 9
Does the FW measure distances in mm or in some arbitrary “distance per
encoder step” unit? From @jetrock[4] 's last post, where just changing
the relative value of the coordinates of the home hole (even though
the absolute location is the same) results in different sized cuts,
this could be a floating…>
Visit Topic[5] or reply to this email to respond.
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I installed the new ground control and got the centering issue figured out. But when I ran ground control I got a message saying I had the wrong firmware
You can ignore the error. You should have firmware.99 , when you
reinstalled GC it’s.100. A mismatch but it should be OK - the firmware will
be out on Wednesday. Even though it shows a warning you can continue.
Thank you
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