40-Taper - Inline - Non-Contact Encoder (NCE) Ring - Replacement - VMC. Introduction

Transcription

1 40-Taper - Inline - Non-Contact Encoder (NCE) Ring - Replacement - VMC LAST UPDATED: 10/30/2018 AD0305 Applies to machines built from: June, 2016 Introduction Important: When replacing a non-contact encoder under warranty, make sure the old part is returned in the replacement part packaging or the warranty may be voided. 1.NCE Ring 2.NCE Read Head 3.NCE Read-Head Mount 4.T-0058 (Encoder-Ring Removal Tool 2") 5.T-0059 (Encoder-Plate Removal Tool 2") You must have T-0060 ENCODER REMOVAL TOOL ASSY 2". T-0060 has these parts: T-0058 ENCODER RING REMOVAL TOOL 2" T-0059 ENCODER PLATE REMOVAL TOOL 2" SHCS 1/4-20 X SHCS 1/4-20 X 1 1/ SSS 1/4-20 X 1 HALF DOG Page 1 of 8 pages

2 Tools Required Spindle Lock Tool (T-1635) Anti-Sieze Compound Encoder-Ring Removal Tool Assembly (T-0060) Page 2 of 8 pages

3 Replacement Page 3 of 8 pages

4 1 Push [POWER OFF]. Set the main circuit breaker to the OFF position. Lock the main circuit breaker. Use an approved lock with an approved safety tag. Remove the spindle head covers. Install the spindle lock tool (T-1635) onto the spindle. For machines without TSC, remove the spindle airtube assembly [1]. For machines with TSC, remove the bearingless TSC rotary union assembly [2]. 2 Remove these parts from the top of the spindle: NCE read head [1] NCE read-head mount [2] Put T-0059 [5] on top of the NCE hub. Use the (2) 1/4 x 20" socket-head cap screws (SHCS) [3] to loosely install the (2) parts of the encoder-ring removal tool assembly [4]. Apply the anti-seize compound [6] to the (4) 1/4 x 20" stud-set screws (SSS) [7]. Put the (4) SSS [7] into the threaded holes on the encoder-ring removal tool assembly [8]. Note: You will tighten these screws in step 5. 3 Make sure the encoder-plate removal tool fits correctly on the spindle-motor hub. Page 4 of 8 pages

5 4 In 1 turn increments, tighten the (4) 1/4-20 x 1" SSS [1] in a star pattern until the encoder ring [3] is removed from the spindle-motor hub. Remove the encoder-ring removal tool assembly [2]. Note: Do not damage the spindle-motor hub when you remove the assembly [2]. Remove the encoder-plate removal tool [4]. Remove these parts from the assembly [2]: (4) 1/4-20 x 1" SSS [5] (2) 1/4 x 20" SHCS [6] NCE ring [3]. 5 Turn the encoder-ring removal tool assembly [2] upside down. Put the replacement NCE ring [3] on the spindlemotor hub. Use the (2) 1/4 x 20" SHCS [1] to install the (2) parts of the assembly [2]. Apply the anti-seize compound [4] to the (4) 1/4-20 x 1 1/4" SHCS [5]. Install the SHCS [5]. Tighten the SHCS [5] in a star pattern. Note: Make sure you gradually tighten the screws until the lip inside the NCE ring [3] touches the top of the spindle-motor hub. Page 5 of 8 pages

6 6 Remove the (4) 1/4 x 20" SHCS [1] and the encoder-ring removal tool assembly [2]. Inspect the NCE ring [3] for any damage. Install these parts on top of the spindle motor: NCE read-head mount [6] NCE read head [5] (2) 8-32" SHCS [4] (Do not tighten the SHCS [4]). (4) 10-32" SHCS [7] 7 For RLS type encoders perform the steps that follow: Put a 0.3 mm plastic shim [2] between the encoder read-head [1] and the encoder ring [3]. Push the encoder read-head [1] toward the encoder ring [2]. Tighten the (2) screws [4] for the encoder readhead. Remove the shim [2]. 8 For the RLS encoder verify the axial alignment of the read-head [1] to the encoder ring [2]. The top face of the read head should be within 0.025" from the edge of the encoder ring. 9 For machines without TSC, install the spindle air-tube assembly. For machines with TSC, install the bearingless TSC rotary union assembly. Remove the spindle lock tool. Page 6 of 8 pages

7 Test Page 7 of 8 pages

8 1 Push [ZERO RETURN]. Push [ALL]. Push [MDI]. Push [ORIENT SPINDLE]. For machines with the side-mount tool changer and the Classic Haas Control, refer to the VMC - SIDE- MOUNT TOOL CHANGER - SPINDLE ORIENTATION OFFSET - PARAMETER 257 procedure. For machines with the side-mount tool changer and the Next Generation Control, refer to the NEXT GENERATION CONTROL - SIDE-MOUNT TOOL CHANGER - SPINDLE ORIENTATION OFFSET procedure. Look at the position of the spindle dogs [1]. Push [ORIENT SPINDLE]. Make sure the spindle dogs stop at the same position [3]. Repeat this step twice to make sure the spindle always orients in the same position. If the spindle does not orient correctly, the gap between the encoder ring and the read head is not correct. Repeat Step 8 of the replacement procedure. 2 This step applies to machines that have the Classic Haas Control or the Next Generation Control. The illustrations in this step show the Classic Haas Control. Operate the spindle at 25% [1], 50% [2], and 100% [3] of the maximum speed. Note: In this example the maximum speed is 7500 RPM. Make sure the spindle speed in the code is the same as the spindle speed on the display. If these spindle speeds are not the same, make sure the encoder parameters are correct. Page 8 of 8 pages