07-26-2021, 02:44 PM
(This post was last modified: 07-27-2021, 12:53 PM by MidniteMachinist.)
I just finished installing 1um glass scales on my 6x12 surface grinder. Unfortunately, there was no good place to install the Z-axis scale, other than right next to the motor. The motor itself is a 3/4hp 3-phase, 220V unit, running off a VFD.
The reading is dead stable with the VFD powered up, but once the motor is up and running, the 4th decimal flickers 1-4 tenths. On a mill or lathe, this wouldn't be a concern... But on the surface grinder, tenths matter.
Is there any way to shield the scale, or otherwise eliminate noise? I've read that the iGaging scales benefit from a 0.01uF cap soldered from VCC to GND... Is there something similar that can be done on the glass scales?
Any help would be greatly appreciated.
The reading is dead stable with the VFD powered up, but once the motor is up and running, the 4th decimal flickers 1-4 tenths. On a mill or lathe, this wouldn't be a concern... But on the surface grinder, tenths matter.
Is there any way to shield the scale, or otherwise eliminate noise? I've read that the iGaging scales benefit from a 0.01uF cap soldered from VCC to GND... Is there something similar that can be done on the glass scales?
Any help would be greatly appreciated.
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