 |
Release tool from spindle |  |
not used |  |
Dust Collector On/Off |
 |
not used |  |
not used |  |
not used |
 |
Work Light On/Off (optional) |  |
not used |  |
not used |
|
Release tool from spindle | |
not used | |
Dust Collector On/Off |
|
not used | |
not used | |
not used |
|
Work Light On/Off (optional) | |
not used | |
not used |
| M10 | Clamp tool in spindle |
| M11 | Unclamp tool in spindle |
| M21 | Pick up new tool (used by M6 procedure) |
| M22 | Put away current tool (used by M6 procedure) |
| M23 | Measure current tool (if optional tool detector installed) |
| M24 | Measure Z Reference (if optional tool detector installed) |
| M70 | Dust Collector On |
| M71 | Dust Collector Off |
| M88 | View current value of variable #159 (tool in spindle) |
| M89 | Change current value of variable #159 (tool in spindle) |
| Parameter | Typical value | Meaning |
|---|---|---|
| 6 | 1 | Indicates that the machine has an automatic tool changer. |
| 17 | 4 | Return point number for fixed tool detector (optional) |
| 161 | 12 | Number of tool positions in tool rack |
| 175 | 5.0 | Time (in minutes) to continue to run spindle chiller after spindle stops. |
| 176 | 500.0 | Time (in milliseconds) to allow low air pressure during M6, before triggering 9041 Fault. |
| 900 | 1 | Indicates that one PLC expansion board is installed. |
| 901 | 1 | Indicates that a spindle chiller is installed. |
| 942 | 0.000 | Z Reference for tool measurement (distance down from home to tool pad with Reference Tool) |
| 950 | ?? | X axis position for first tool rack pocket (T1 position) |
| 951 | ?? | Y axis position for first tool rack pocket (T1 position) |
| 952 | ?? | X axis spacing between tool rack pockets |
| 953 | ?? | Y axis spacing between tool rack pockets |
| 954 | -?? | Z distance (down from home) to clearance level above rack.
This is the "fly-over" level where an empty spindle will clear the tapers of any tool holders in the rack. |
| 955 | -?? | Z distance (down from home) to engage tools in rack.
This is the level to clamp and unclamp tools. |
| Variable | Typical value | Meaning |
|---|---|---|
| 159 | 0 - 12 | Tool number currently in spindle.
0 indicates spindle is empty. |
| Location | Use |
|---|---|
| Return Point #4 (G30 P4) |
Spindle aligned over tool touch pad (tool-measuring start point) |
The PLC program can generate the following error and fault messages, in addition to those listed in the Centroid operator's manual:
You attempted to start the spindle, but the tool clamp is open.
Close the clamp, or load a tool as needed with M6, then try again.
References:
PLC INP21: Tool-clamped switch state: Green = 1 = tool clamped; Red = 0 = tool not clamped PLC INP22: Tool-unclamped switch state: Green = 1 = tool unclamped; Red = 0 = tool not unclamped PLC OUT22: Tool-unclamp solenoid state: Green = 1 = unclamp tool; Red = 0 = idle Schematic: Lines ??
You attempted to run a tool change (M6), but the air pressure was not adequate, or dipped low during the tool change.
References:
PLC INP18: Air Pressure switch state: Green = 1 = pressure okay; Red = 0 = low or no pressure Schematic: Line ??
The M21 and M22 macros contain G20 (or G21, if edited) codes, to ensure that the tool-rack moves are made in the same system of units that the 950-series parameters were set with. This is inches, unless the macros are edited to specify G21 instead.
The M21 and M22 macros will save and restore the current working units (system variable #4006), so that they will not conflict with whatever units the user has selected.
While the macros could use system variable #25009 to select the default machine units, and assume that the 950-series parameters were stored in default machine units, this would be a bad idea. It is too easy for the operator to change default machine units, and if he did so, the 950-series parameters would not be automatically recalculated, and the tool changer operations would no longer work.
The user can set up the work envelope limits to exclude the tool rack, and can put G22 codes in their part programs after each tool change.
The M6, M23 and M24 macros include a G23 code, to automatically cancel the work envelope limits, allowing access to the tool rack and tool detector.
If a TT1, TT1B, TT2, or similar device is permanently installed on the machine, then the M23 macro can be used to automatically measure tools during a cycle.
The M23 macro depends on a "Z Reference" value stored in Parameter 942. This means the same thing as Z Reference in the Tool Offset Library, but is set separately.
This is necessary because we want to be able to measure Z Reference automatically (using M24), but the Z Reference system variable (#24103) is read-only.
Set Parameter 942 equal to the distance down, from the Z axis machine zero, to where the Reference Tool trips the tool detector. If there is no Reference Tool, and tool height offsets are to be measured down from machine zero, then set Parameter 942 = 0.0.
Reference Return Point #4 (G30 P4) is used to locate the tool detector.
Set the X and Y coordinates of return point #4 to the location of the
detector, in Machine coordinates. Leave the Z coordinate at 0.0, or
set it at a minimum height that will allow even the longest tool to clear all
obstacles on the way to the tool detector. Set Parameter 17 = 4.0.
