Wire EDM Machine Operation Chapter 8
Copyright November, 98 Page 8-8 Sodick Inc.
that comes with your machine, if not already input into the “set” screen. It is wise to write
down the value of Table To Limit and keep it (with Table To Lower) posted on the
machine. This value should only change if replacing the upper guide, or if the upper head
gets crashed.
TABLE TO UPPER
Table to upper is the distance between the worktable and the upper guide. To correctly
input this value, you have to know the value of Table To Limit for your machine (located
on the “set” screen). Use the following information for setting T-Upper.
Table To Upper and Table To Limit For A Manual Z Axis Machine
Table To Limit for a manual Z axis machine is the distance from the tabletop to the upper
guide WHEN THE VERNIER SCALE FOR THE Z AXIS HEIGHT IS READING
ZERO.
Table to Upper value is known by positioning the Z-axis to the where you are going to
position the head during cutting. Now, add the value on the vernier scale to the Table To
Limit value, then input this sum into the Table To Upper register in the SET screen.
Table To Upper and Table To Limit For Power Z Axis Machines
Table To Limit for a power Z axis machine is the distance from the tabletop to the upper
guide WHEN THE Z-AXIS IS AT ITS UPPER LIMIT SWITCH POSITION.
Table To Upper is automatic as the Z axis is moved up or down. The value of Table To
Upper changes by itself because the machine knows where the head is at. Just be sure that
this feature is turned on. Go to the SET, TRAVEL screen and look at the right column
and verify that “AUTO T UPPER” is turned on.
Note: For both power or manual z axis machines Table To Limit is a machine constant
and is not altered from job to job. It may need to be changed but only if your machine is
not cutting taper accurately. To calibrate Table To Limit see the end of this chapter
describing calibrating T-Upper T-Lower.
TABLE TO LOWER GUIDE
This is the distance from the worktable to the lower wire guide. This is a constant that
will usually not change. Sodick documents this value in the list of parameters (the
mechanical file) that comes with your machine. You should write this value down and
keep it near the machine. NOTE: This is a positive number.
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