Voir la source de Common Issue - Datum Holes in Wrong position

{{Tuto Details
|Description=<translate>Common root causes that may lead to a varying result when running a datum test</translate>
|Categories=Maintenance
|Tags=Datum, Varying, Holes
}}
<translate>See [https://stuga.dokit.app/wiki/WinMulti_-_Datum_Test winMulti - Running a Datum test] for instructions on how to produce the datum holes

{{Dont|...If the datum holes vary after running multiple tests, the issue cannot be resolved by changing parameters.}}<br />
{| class="wikitable"
|+Datum holes in wrong position - Root Causes
!Common Symptoms
!Root Cause
!Description
!Solution
|-
| rowspan="2" |Y and Z axis wandering randomly
|Backlash in ring
|The R axis pinion to main ring gear is worn and giving backlash
|Mesh the gears
Replace R axis pinion assembly
|-
|Cutter not inserted in collet correctly
|Cutter is wobbling in the spindle collet
|Fit correctly
|-
| rowspan="3" |X axis datum position wandering
|Profile end not square
|The end of the profile is not square and therefore tricky to measure. 
On machines with a laser on the saw, this is not a problem

on machines without a laser, the "Trimstart" option should be enabled to trim the bar end square
|If laser is not fitted, ensure trimstart is on
|-
|Cutter not inserted in collet correctly
|Cutter is wobbling in the spindle collet
|Fit correctly
|-
|Gripper not set up correctly
|Gripper mechanics are worn or incorrectly set up
|Ensure gripper setup is correct
See [https://stuga.dokit.app/wiki/Gripper_Mechanical_Setup_-_Flowline,_Microline,_ZX3_or_ZX4 Gripper Mechanical Setup]
|-
|Y or Z axis jumps '''<u>exactly</u>''' 5 or 10mm out
|Datum Sensor in wrong position
|The datum system has a "zero pulse" on every leadscrew turn. 
The position of the sensor may be on the borderline of this zero pulse

Sometimes the datum jumps to the next zero pulse, hence the datum jumps by one turn of the leadscrew
|Move the datum sensor by 2mm in either direction.<br />
|-
|X axis jumps 30-40mm in either direction
|X axis Zero pulse in wrong position
|The datum system has a "zero pulse" on every motor turn. 
The position of the sensor may be on the borderline of this zero pulse

Sometimes the datum jumps to the next zero pulse, hence the datum jumps by one turn of the motor - equating to around 35mm
{{Info|...Often caused after an X axis motor is removed and replaced}}<br />
|Rotate the motor on the gearbox by 90 degrees
|}</translate>
{{PageLang
|Language=en
|SourceLanguage=none
|IsTranslation=0
}}
{{AddComments}}
{{Tuto Status
|Complete=Draft
}}