Service Home How To Procedures Mini Mill/Super Mini Mill - Installation

Mini Mill/Super Mini Mill - Installation

3.1 MM/SMM - Installation

Last updated: 03/17/2025

Mini Mill/Super Mini Mill - Installation

Introduction

This procedure tells you how to install a Mini Mill/2/EDU, or Super Mini Mill/2. To install a Reboot Mini Mill, refer to the Mini Mill - Installation procedure for more information. 

Tools Required:

  • 3/4" Socket
  • 5/32", 1/4", 3/8" Hex Bit Sockets
  • Ratchet
  • 3/4", 1.5" Wrench
  • Tape Measure
  • .0005" or 1 micron Test Indicator and Magnetic Base
  • T-2181 SERVICE TOOL, LEVELING TOOL or Precision Machinist Level, 0.0005" Division

Leveling Screws Hardware

Note: The washers [1] and nuts [2] are installed during shipping and should be saved for installation and not be discarded.

Note: The washer orientation [3] is important.  The conical part of the washer should be against the casting,  see illustration.

Remove Rust Inhibitor

For ease of removal, first use a plastic scraper to remove most of the rust inhibitor and then use either a heavy duty citrus cleaner or Simple Green to spray all the way covers and other non-painted surfaces that have been coated with rust inhibitor. Let it soak for a few minutes before removing it using a shop towel. It is recommended to apply mineral spirit or WD-40 to all exposed metal surfaces for rust proofing.

 Important: Do not use scotch-brite or metal scrapers, these will scratch the way covers. Furthermore, to avoid any contamination of the way cover seals with the sticky residue. Do not move any of the axes until all the rust inhibitor has been removed.

Note: The product is not hazardous and can typically be disposed of similarly to used oil.

: https://vimeo.com/haasautomation/review/171129636/7c2a5127f9

Air Connection

Connect the air supply at the lube panel.

 Note: For air requirements refer to the decal that is located on the lube cabinet door.

Follow the Air Gun and Hose Installation procedure to install or replace the Air Gun.

 Note: Some installation kits will come with a spare air gun assembly.

Electrical Installation

Danger: WORKING WITH ELECTRICAL SERVICES REQUIRED FOR A CNC ARE EXTREMELY HAZARDOUS. ALL POWER TO CNC MUST BE TURNED OFF LOCKOUT-TAGOUT AT THE SOURCE PRIOR TO CONNECTING THE LINE WIRES TO CNC. HOWEVER, IF THIS NOT THE CASE OR ARE NOT SURE HOW TO DO THIS, CHECK WITH APPROPIATE PERSONNEL OR OBTAIN THE NECESSARY HELP BEFORE CONTINUING. ALWAYS CHECK THE INCOMING LINES WITH AN AC VOLTAGE DETECTOR TO MAKE SURE POWER HAS BEEN DISCONNECTED.

1

Initial Control Inspection

Danger: At this point, there should be no electrical connection to the machine. Electrical panel must be closed and secured. When main switch is on, there is HIGH VOLTAGE throughout the electrical panel (including the circuit boards and logic circuits) and some components operate at high temperatures. Therefore, exercise extreme caution when working in the panel.

  • Set the main breaker switch at the upper right of the electrical panel on the back of the machine to OFF.
  • Using a screwdriver, unlock the two latches on the panel door, unlock the cabinet with the key and open the door.
  • Take sufficient time to check all the components and connectors associated with the circuit boards. Look for any cables that have become disconnected, look for any signs damage and loose parts in the bottom of the panel box. If there are any signs that the machine was mishandled, call the factory before proceeding.

2

1-Phase Machines: Insert each power lead into the wire cover.  Connect the two power leads to L1 and L3 terminals on top of the main circuit breaker.

3-Phase Machines: Insert each power lead into the wire cover.  Connect the three power leads to L1, L2 and L3 terminals on top of the main circuit breaker.

Connect the separate ground line to the ground bus to the left of the terminals.

Refer to Haas Main Circuit Breaker - Torque Specifications for what value to torque the circuit breaker power leads.

 Note: Make sure that the leads actually go into the terminal-block clamps . (A poor connection will cause the machine to run intermittently or have other problems, such as servo overloads.) To check, simply pull on the wires after the screws are tightened.

3

After the line voltage is connected to the machine, make sure that main circuit breaker (at top-right of rear cabinet) is OFF . Remove the Lockout / Tagout and Turn ON the power at the source. Using a digital voltmeter and appropriate safety procedures: 

1-Phase Machines: Measure the AC voltage across L1 & L3 at the main circuit breaker.  The AC voltage must be between 220 - 250 volts .
Note: Lower or higher than this voltage can generate low/high voltage alarms.

3-Phase Machines : Measure the AC voltage between all three pair phases at the main circuit breaker. 

The AC voltage must be between 195 and 260 volts (360 and 480 volts for high voltage option).

SMinimill - Reboot: The AC voltage must be between 198 and 242 volts for machines without a high voltage transformer.  Refer to the Minimill/SMinimill - Identification document.

 Note: Wide voltage fluctuations are common in many industrial areas; minimum and maximum voltage supplied to a machine while it is in operation must be known. U.S. National Electrical Code specifies that machines should operate with a variation of +5% to -5% around an average supply voltage. If problems with line voltage occur, or low line voltage is suspected, an external transformer may be used. If you suspect voltage problems, voltage should be checked every hour or two during a typical day to be sure it does not fluctuate more than +5% or -5% from an average.

4

Important: With the main circuit breaker turned OFF.

Check the transformer taps at the bottom-right corner of the rear cabinet.

1-Phase Machines: The input voltage cable must be moved to the connector which corresponds to the average voltage measured in the above step.

3-Phase Machines:  The input voltage cables labeled 74, 75, and 76 must be moved to the terminal block triple which corresponds to the average voltage measured in the above step.

5

Transformer T5 supplies 24VAC used to power the main contactor. There are two versions of this transformer for use on a 240 and 400V machines. The 240V transformer has two input connectors located about two inches from the transformer, which allow it to be connected to either 180-220V or 221-240V.

Users that have 220V-240V RMS input power should use the connector labeled 221-240V, while users with 190-220V input power should use the connector labeled 180-220V. Failure to use the correct input connector will result in either overheating of the main contactor or failure to reliably engage the main contactor.

The 480V (option) T5 transformer has three input connectors, labeled 340-380V, 381-440V and 441-480V.

Users with 340-380V 50/60Hz power should use the 340-380V connector while users with 380V-440V 50/60Hz power should use the 381-440V connector.

Important: Set the main circuit breaker to ON. Check for evidence of problems, such as the smell of overheating components or smoke. If such problems are indicated, immediately set the main circuit breaker to OFF and call the factory before proceeding.

After the power is on, measure the voltage across the bottom terminals on the main circuit breaker. It should be the same as the measurements where the input power connects to the main breaker. If there are any problems, check the wiring.

6

Apply power to the control by pressing the Power-On switch on the front panel.

Check the DC Voltage and AC Line Voltage gauges in Diagnostics. The DC Voltage gauge must read between 310 - 360V. The AC Line Voltage must be between 90 and 105 percent. If the voltage is outside these limits, turn off the power and recheck steps 2 and 3. If the voltage is still outside these limits, call the factory.

7

Electrical power must be phased properly to avoid damage to your equipment. The Power Supply Assembly PC board incorporates a "Phase Detect" circuit with neon indicators. When the orange neon is lit (NE5), the phasing is incorrect. If the green neon is lit (NE6), the phasing is correct. If both neon indicators are lit, you have a loose wire; check the connections. Adjust phasing by setting the source power to off and then swapping L1 and L2 of the incoming power lines at the main circuit breaker.

Danger: ALL POWER TO CNC MUST BE TURNED OFF LOCKOUT-TAGOUT AT THE SOURCE PRIOR TO ADJUSTING PHASING. ALWAYS DOUBLE CHECK THE INCOMING LINES WITH AN AC VOLTAGE DETECTOR.

Turn off the power and set the main circuit breaker to OFF. Close the door, lock the latches, and turn the power back on.

Remove the key from the control cabinet and give it to the shop manager.

8

Activation

When the machine is properly placed and connected to both air and electrical power, it is ready for final installation (removing shipping blocks, leveling, spindle sweep, etc.) and software activation. The HFO service technician does this. Contact the local HFO to schedule the work.

Shipping Brackets Removal

1

Remove the pendant shipping bracket.

2

Remove the small operator door shipping bracket.

3

Remount the door handle on the outside of the operator door.

4

Press [POWER ON] and follow the instructions indicated on the screen.

Press the [HAND JOG] and [Z+] buttons. Jog the Z-axis upward.

Remove the 40T spindle shipping bracket.

Machine Leveling

1

Zero return each axis one at a time or press [POWER UP]. Go through the leveling process.
Repeat these steps to achieve correct machine level.

2

Set the machine height using the four corner leveling bolts [1 ,2, 3, 4] to 3" +/- .5" (75 mm +/- 10 mm) above the floor. Turn each screw so they have equal tension.

Jog the X-axis and Y-axis to the middle of their travel, centering the table.

Note: The image shows the layout of the DM-2, but the same process applies to all DM, DT, Mini Mill, and Super Mini Mill machines with four leveling bolts. If your machine has six or more leveling bolts, please see:

VMC Leveling

3

Clean the table surface and leveling tool (T-2181) and check the calibration of the leveling tool before proceeding.

Position the level at the center of the table, parallel to the X-axis. Use a t-slot for alignment.

Note the position of the bubble.

Reposition the level by turning it 180 degrees. The bubble should display the same reading as previously.

If the readings are different by more than one division, return the level to Haas for adjustment and do not use it to level the machine.

4

Adjust corner leveling bolts [1, 2] or [3, 4] until the bubble parallel with the Y-axis is centered.

This levels the machine front to back.

Always raise the lower side of the machine to maintain clearance for the coolant tank (if equipped) and adjust the two leveling bolts on that side an equal amount.

5

Adjust corner leveling bolts [1, 3] or [2, 4] until the bubble parallel to the X-axis is centered.

This levels the machine left to right.

Again, raise the lower side of the machine and adjust the two leveling bolts on that side an equal amount.

6

Keep the level in the same position and jog the Y-axis to bring the table to the front of the machine.

Note the position of the bubble.

Jog the Y-axis across its full travel, stopping at the column. Look to see which rear corner of the machine is lowest, as shown by the leveling tool.

Raise the lowest rear corner by adjusting corner leveling bolt [3] or [4] until the bubble is centered on the level.

7

Jog the Y-axis back across its full travel, bringing the table to the front of the machine. Look to see which front corner is lowest, as shown by the level.

Raise the lowest front corner by adjusting corner leveling bolt [1] or [2] until the bubble is centered on the level.

Repeat steps 6 and 7, moving the table back and forth across the full travel of the Y-axis, raising the lowest corner each time.

Continue this process until the level reads zero at both ends of the Y-axis travel.

Spindle Sweep Check

1

Lower the Z-axis to the middle of its travel. Attach the test indicator to the magnetic base and attach the magnetic base to the bottom of the spindle.

Position the test indicator to measure a 10" (250 mm) diameter circle.

Position the table so the test indicator will remain on the table (not over a t-slot) when facing both the front and column sides of the machine.

Face the indicator toward the front of the machine, lower the Z-axis in tenth (.0001") increments, and bring the test indicator down to contact the table.

Zero the test indicator.

2

Turn the spindle by hand and take a reading every 90 degrees to provide two values along both the X-axis and Y-axis.

The difference between the indicator readings for each axis should not exceed .0005" (.013 mm).

3

Lock the leveling bolts in place by tightening the locking nut while holding the leveling bolt.

Ensure that the leveling bolts do not move during this process.

Note: If the spindle sweep is out of tolerance, make sure the level of the machine is correct.

For a more indepth guide on how to perform this procedure, please see:

VMC Spindle Sweep

Lubrication Verification

1

Run the spindle run-in program.

 Note: For 10K spindles and above use a balanced tool holder

Examine the sight glass, make sure the correct number of drops are fall through the sight glass.

Examine the fittings [1,2] on top of the oil pump tank.

The oil collects on top of the oil pump tank [3] either behind or in front of the sight glass bracket, underneath the leaking fitting.

Tighten any leaking fittings.

2

Go to the Maintenance tab.

Press [F2] to cycle an axis lubrication test.

Inspect the gauge on the lubrication system.  Make sure it holds pressure.

MiniMill-EDU Machines

1

For MiniMill-EDU Machines:

If the machine has the 45 gallon coolant tank field install option 93-1001072, the chip separator and coolant rail need to be installed.

Install the coolant filter [1] by fastening it to the back of the enclosure panel with the FBHCS [2]. Then connect the hoses and route them as detailed below:

Route the blue coolant hose [3] from the top left of the of the chip separator to the fitting in the spindle head.

Route the black coolant line [4] from the push connect fitting to the rear Y-axis waycover washdown connector. The hose should be routed through the column casting.

Route the blue coolant hose [5] from the top right of the chip separator assembly to the coolant washgun bracket.

Connect the blue coolant hose [6] from the middle of the chip separator to the coolant pump [7].

2

For Minimill-EDU Machines:

Install the coolant ring assembly by fastening it to the spindle head.

Use the long SHCS [3] and the 2 coolant rail clamps [2] to install the coolant rail assembly [1].

Use the spacers [4] between the coolant rail and the spindle head.

Fasten the p-cool mounting bracket [5] to the spindle head using the BHCS.

Route the hose going from the spindle head to the coolant valve [6].

Route the other hose [7] from the valve to the coolant rail

Note: Make sure all fittings are tightened to prevent coolant leaks.

Note: If the machine was order from the factory with the 45 gallon coolant option, these steps are not needed. This only needs to be done for the field install kit 93-1001072. Verify that the option works following the testing in the next section.

Final Testing

1

Connect the Coolant Pump and the Through Spindle Coolant (TSC) Pump (if equipped).

Attach the blue coolant hose from the filter inlet to the Coolant Pump outlet.

Plug in the Coolant Pump to the Low Pressure Coolant plug.

Attach the TSC Pump to the small purple coolant hose.

Plug in the TSC Pump to the High Pressure Coolant plug.

Plug in the Coolant Level Sensor and other related sensors to the corresponding plugs.

2

Test the Flood Coolant.

Open the valve for the coolant ring and close the operator door prior to this test.

Press [COOLNT] on the control. Coolant should flood from the nozzles.

Press [COOLNT] again to stop the flow.

3

Test the Through Spindle Coolant (TSC) (if equipped).

Put a TSC toolholder in the spindle [1].

Press [AUX CLNT] to start the TSC.

Correct operation is as follows:

  1. Coolant flows correctly from the TSC tool holder.
  2. A few drops flow from the vacuum-generator hose [2].

Press [RESET].

4

Test the Spindle.

Run the Spindle Run-In program:

VMC Spindle Run-In

5

Test the Chip Auger (if equipped).

Press [CHIP FWD] and [CHIP REV] on the control.

6

Test the Door Interlock.

Press [MDI], type in S500 M03, and press [ENTER].

Ensure that the machine is not in set up mode by checking the key switch on the side of the pendant.

Press [CYCLE START] with the door open. The machine should say to close the door and press [CYCLE START].

Press [CYCLE START] with the door closed. The interlock pin should extend and the spindle should start spinning.

Try to open the door with the spindle spinning. The spindle should not stop rotating.

7

Test the Through-Tool Air Blast (TAB) (if equipped).

Operate this code in MDI mode:

M73;

G04 P5.;

M74;

G04 P3.;

M99;

M73 starts the TAB. M74 stops the TAB.

Manually operate the TAB:

Press [AUX CLNT]. Press the [RIGHT] cursor arrow.

The tool air blast starts.

Press [AUX CLNT].

The tool air blast stops.

8

Test Key Switches.

Insert the Setup/Run Lock Key (#2007) to the lower key slot and turn to the unlocked position.

Verify that the key can only be removed from the locked position.

Insert the Memory Lock Key (#2341) to the upper key slot and turn to the locked position.

Verify that the key can be removed from either position.

With the Memory Lock Key in the locked position, verify that changes cannot be made to the settings or programs.

9

Verify that a window latch is installed on each side access window.

(This does not apply to fixed side windows on DM and DT series machines.)

Verify that the latch engages for each window to keep the window in the up position.

Verify that the window locks are installed on each side window.

Verify that the windows lock closed in the down position.

Install and Calibrate WIPS

1

Install and calibrate the Wireless Intuitive Probe System (WIPS) (if equipped).

For an in depth guide on WIPS installation and calibration, please see:

WIPS Installation