marbles
22-03-2019, 11:48 AM
Howdy,
I’m still finding errors in my 3d carvings. Just occasionally as in this rotary carving I have a line or a band which I need to isolate and go back over to correct. Sometimes as in this test example they are so slight I don’t notice till i’ve removed.
https://www.youtube.com/watch?v=sv9ah8wZkFg
The error is always from the z axis and the problem accelerates the higher and faster the elevation changes are, in relation to the distance between peaks and troughs. I can usually resolve the issue by repeating a pass over the area but think its time to understand the main issue and deal with that.
Material: Beech
head height approx 75mm
Finishing pass: 0.5mm taper ballend, 60mm/s, plunge 30mm/s
I’m presuming this is a mechanical electrical problem as I built the machine from scratch and not a gcode issue. I’m also wondering whether I run the machine too fast. Perhaps I need to adjust the velocity and acceleration of of the z axis motor in Mach 3 motor tuning. Perhaps a combination of severe things?
z axis
1:1 ratio. steps per 169-ish, Velocity 5000, Acceleration 500
What i’m sure would be useful would be if machine could slow to accommodate abrupt Z axis changes and speed up over longer curves, similar to deceleration for tight corners on flat material.
Any ideas or suggestions welcome.
25546
I’m still finding errors in my 3d carvings. Just occasionally as in this rotary carving I have a line or a band which I need to isolate and go back over to correct. Sometimes as in this test example they are so slight I don’t notice till i’ve removed.
https://www.youtube.com/watch?v=sv9ah8wZkFg
The error is always from the z axis and the problem accelerates the higher and faster the elevation changes are, in relation to the distance between peaks and troughs. I can usually resolve the issue by repeating a pass over the area but think its time to understand the main issue and deal with that.
Material: Beech
head height approx 75mm
Finishing pass: 0.5mm taper ballend, 60mm/s, plunge 30mm/s
I’m presuming this is a mechanical electrical problem as I built the machine from scratch and not a gcode issue. I’m also wondering whether I run the machine too fast. Perhaps I need to adjust the velocity and acceleration of of the z axis motor in Mach 3 motor tuning. Perhaps a combination of severe things?
z axis
1:1 ratio. steps per 169-ish, Velocity 5000, Acceleration 500
What i’m sure would be useful would be if machine could slow to accommodate abrupt Z axis changes and speed up over longer curves, similar to deceleration for tight corners on flat material.
Any ideas or suggestions welcome.
25546