Side Mount (SMTC) - VMC - Spindle Orientation Offset - Parameter 257

VMC - Side-Mount Tool Changer - Spindle Orientation Offset - Parameter 257

This procedure tells you how to set Parameter 257 (Spindle Orientation Offset) on a machine with a side-mount tool changer (SMTC).
Safety Notes
Caution: When you do maintenance or repair on CNC machines and their components, you must always follow basic safety precautions. This decreases the risk of injury and mechanical damage.

Do these steps before you do work in the machine or in the control cabinet:
  • Set the main circuit breaker to the OFF position.
  • Use an approved lock with an approved safety tag. Always follow lock-out procedures in accordance to local government rules.
  • After turning off the machine, wait at least 5 minutes before working in the control cabinet, to allow power to dissipate. Wait for the voltage indicator LED on the vector drive to go off completely.
  • Always turn off the main air supply when you work on any part of the pneumatic system.
  • Make sure to rest the spindle head on a block of wood when work is done on a vertical axis. This will prevent any unintended movement that could result in the axis falling.
  • Never alter any safety circuits on the machine.
You should not do machine repair or service procedures unless you are qualified and knowledgeable about the processes. Serious damage to the machine components can result in costly repairs. The service technicians at your Haas Factory Outlet (HFO) have the training and experience, and are certified to do these tasks safely and correctly. The repair and service work performed by your HFO is protected with a limited warranty.
danger: Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not fully understand. If you have any doubts about doing a procedure contact your Haas Factory Outlet (HFO) and schedule a service visit.

Tools Required

Dial indicator with Magnetic Base

Step 1

Do these steps to make the spindle dogs as parallel as possible to the X Axis without a dial indicator:

  1. Push ORIENT SPINDLE. Push EMERGENCY STOP.
  2. Push SETTING. Set Setting 7 to OFF.
  3. Push PARAMETER/DIAGNOSTIC. Go to Parameter 257.
  1. Increase the value of Parameter 257 in increments until the spindle dogs are parallel to the x axis after you push ORIENT SPINDLE.
note: If you add 1000 to the value of Parameter 257, this equals approximately 1/4 turn of the spindle orientation location.
  1. Release EMERGECY STOP. Push RESET.
  1. Do these steps again to make the spindle dogs as near to parallel to the X Axis as possible.
Push ORIENT SPINDLE.

Step 2

Put the magnetic base with the indicator on the table.

Handle jog the machine to indicate the alignment of the spindle dogs and the X Axis.

The spindle dogs must be aligned within 0.010" (0.254 mm) of the X Axis.

Do the STEP 1 instructions again until the spindle dogs align with the X Axis. Make sure the alignment error is not more than 0.010" (0.254 mm) of the X Axis. Increase or decrease the value of Parameter 257 by much smaller increments.

caution: After you change the value of Parameter 257, make sure the indicator is out of the path of the spindle dogs.

Step 3

Do these calculations to determine the correct value for Parameter 257:

Divide the value of Parameter 79 by 360. This tells you the number of encoder counts per degree of spindle rotation.

Example: Parameter 79 = 4096 ; 4096 / 360 = 11.37

Multiply the number of encoder counts per degree of spindle rotation by the correct value for your machine: 30-Taper = 88.6; 40-Taper = 74; 50-Taper = 66.6. Round the result to the closest whole number. Subtract the rounded number from Parameter 257. Refer to examples:

Taper Multiply encoder counts per degree of spindle rotation by the correct value for your machine Round to the closest whole number Subtract from Parameter 257
30‑Taper 11.37 * 88.6 = 1007.382 1007 1892 - 1007 = 885
40‑Taper 11.37 * 74 = 841.38 841 1892 - 841 = 1051
50‑Taper 11.37 * 66.6 = 757.242 757 1892 - 757 = 1135

Step 4

Operate a tool change with no tools in the spindle or pocket.

Push FEED HOLD when the tool changer arm is at the spindle. Make sure the spindle dog [1] is aligned to the key [2] on the tool changer arm.
note: To make a fine adjustment to Parameter 257, push CYCLE START to complete the tool change. Increase or decrease the value of Parameter 257 in increments of 10 until the spindle dogs are aligned.. Repeat this step if necessary.
Push SETTING. Set Setting 7 to ON.

Be aware: Many service and repair procedures should be done only by authorized personnel. The service technicians at your Haas Factory Outlet (HFO) have the training, experience, and are certified to do these tasks safely and correctly. You should not do machine repair or service procedures unless you are qualified and knowledgeable about the processes.

Danger: Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not completely understand. Contact your Haas Factory Outlet (HFO) and schedule a service technician visit if you have any doubts about doing a procedure.

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