10-18-2018, 11:22 PM
Hi everyone,
Happy to report that everything is still working correctly. Thanks Yuriy for the tip on the CPU count.
I have noticed an unusual quirk on the y-axis, though. When I put an indicator on the ways, zero everything out and travel, say, 0.500", everything correlates well ( indicator, graduated dial and touchdro). If I reverse direction, and turn into the indicator reads 0, the handwheel dial doesn't match (expected because of backlash). But, the touchdro readout actually reads -0.004" i.e. it shows 4thou MORE travel than expected. Has anyone else encountered this?
I confirmed that the added travel happens right after reversing direction - the dro starts moving before the indicator registers any movement. It's a big, old, and somewhat worn mill (van norman 26), and the dro scale is located fairly close to the crossfeed screw which is a fair distance from the saddle ways (15" ish). I'm wondering if there's a bit of rocking of the saddle going on (heavy as it is...). The gibs are as tight as I feel I can make them without struggling to crank the wheels.
Also: if I reverse past zero, then change direction again and come back to zero on the dial indicator, the handwheel dial and the dro all read zero.
The other though I had was maybe it's an alignment problem with the scale, read head and the travel. I made a few adjustments ( one side was a few thousandths high), but it doesnt seem to change the 0.004" much at all.
Any and all suggestions are greatly appreciated!
Lee
Happy to report that everything is still working correctly. Thanks Yuriy for the tip on the CPU count.
I have noticed an unusual quirk on the y-axis, though. When I put an indicator on the ways, zero everything out and travel, say, 0.500", everything correlates well ( indicator, graduated dial and touchdro). If I reverse direction, and turn into the indicator reads 0, the handwheel dial doesn't match (expected because of backlash). But, the touchdro readout actually reads -0.004" i.e. it shows 4thou MORE travel than expected. Has anyone else encountered this?
I confirmed that the added travel happens right after reversing direction - the dro starts moving before the indicator registers any movement. It's a big, old, and somewhat worn mill (van norman 26), and the dro scale is located fairly close to the crossfeed screw which is a fair distance from the saddle ways (15" ish). I'm wondering if there's a bit of rocking of the saddle going on (heavy as it is...). The gibs are as tight as I feel I can make them without struggling to crank the wheels.
Also: if I reverse past zero, then change direction again and come back to zero on the dial indicator, the handwheel dial and the dro all read zero.
The other though I had was maybe it's an alignment problem with the scale, read head and the travel. I made a few adjustments ( one side was a few thousandths high), but it doesnt seem to change the 0.004" much at all.
Any and all suggestions are greatly appreciated!
Lee