UHV Design MD40 Series Specification sheet

MD40 Revision: 1.1 Author: N.Carapiet
PRODUCT INSTRUCTION MANUAL
Product Range: MD40
Product Description
CF40 (2.75” OD) magnetically-coupled rotary drive (rotary feedthrough).

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TABLE OF CONTENTS
MANUALLY ACTUATED MD40.............................................................................................. 4
SIDE MOUNTED STEPPER OR DC MOTORISED MD40H ................................................11
INLINE MOUNTED STEPPER OR DC MOTORISED MD40H.............................................22
PNEUMATICALLY ACTUATED MD40 ................................................................................. 31
Side Mounted Motor Specifications.......................................................................................39
Inline Motor Options .............................................................................................................. 42
Wiring Diagrams.................................................................................................................... 44
Base Drive.............................................................................................................................47
Dual Shaft.............................................................................................................................. 48
Pneumatic Drive ....................................................................................................................49
Side Mounted Stepper Motor Options...................................................................................50
Side Mounted DC Motor Options .......................................................................................... 51
Inline Mounted Stepper Motor Options..................................................................................52
Inline Mounted Stepper Motor Options..................................................................................53

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IMPORTANT SAFETY INFORMATION!
This document is intended as a user guide to operation as determined by the design.
The instrument described in this document should not be used on any system where toxic,
flammable, corrosive or otherwise hazardous gases or substances may be introduced without prior
discussion with UHV Design.
Hands and fingers should be kept well clear of any moving parts during operation or whilst at
vacuum.
This equipment should be put into service only by Competent Persons who have first studied this
manual and followed carefully the recommended procedures.
INSTALLATION & OPERATION
This manual covers installation and operation for standard MD40 configurations:
Manual Actuation
•Example Part Numbers:
MD40TX000Z, MD40DX000Z, MD40DX000CE
Motorised Actuation
•Example Part Numbers:
MD40IS1X000Z, MD40SS3X000Z, MD40ISES2DX000CE
Pneumatic Actuation
•Example Part Numbers:
MD40RAX000Z, MD40RAIX000Z

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MANUALLY ACTUATED MD40
2.1.1 Description
Standard Drive Thimble | Manual operation. See pages 5-7.
Dual Shaft Option | Rear shaft to allow the thimble to be driven directly. See pages 8-10.
See the Drawing section of this manual for dimensional details.

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2.1.2 Installation instructions –Standard Drive Thimble
STAGE 1 | To install the drive onto the vacuum system, the drive thimble will have to be removed
in order to gain access to the flange mounting holes.
How to remove the Drive Thimble:
1. Remove 3 x M3 Grub Screws
2. Pull End Cap away from Drive Thimble
3. Remove Brake Ring
4. Remove Drive Thimble. The thimble requires considerable force to decouple the magnets. Take
care not to damage the inner magnets.
5. Keep all items removed in a safe place
Flange Mounting Holes
Drive Thimble
Brake Ring
3 x M3 Grub Screw
End Cap

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STAGE 2 | Mounting the drive
How to install the Flange Assembly:
1. Use an appropriate CONFLAT Gasket
2. Use 6 appropriate length Mounting Bolts and washers (note: only hex head bolts can be used)
3. Place CONFLAT Gasket into flange counter bore
4. Insert MD40 flange assembly
5. Insert bolts and tighten.
Note: when tightening bolts, care must be taken not to tighten
them unevenly as this may cause the gasket not to seal properly.
STAGE 3 | Replace thimble and associated parts.
CONFLAT Gasket
CF40 Chamber Port
Mounting Bolts
Flange Assembly

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How to re-install the Drive Thimble:
6. Push Drive Thimble over the Flange Assembly (take care when re-coupling the magnets –the
magnetic coupling may cause a sudden movement)
7. Insert Brake Ring, ensuring that the hole in the brake ring aligns with the screw in the end cap
8. Place End Cap on the end of the Drive Thimble
9. Insert and tighten 3 x M3 Grub Screws
2.1.3 Bakeout procedure
The manual drives can be baked to 250oC without the need to remove any components.
Drive Thimble
Brake Ring
3 x M3 Grub Screw
End Cap
Flange Assembly

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2.1.4 Installation instructions –Dual Shaft Option
STAGE 1 | To install the drive onto the vacuum system, the drive thimble will have to be removed
in order to gain access to the flange bolt holes.
How to remove the Drive Thimble:
1. Remove 3 x M3 Grub Screws
2. Pull Dual Shaft End Cap off Drive Thimble
3. Remove 3 x M3 Grub Screws
4. Remove Bearing Cap
5. Remove Drive Thimble. The thimble requires considerable force to decouple the magnets.
Take care not to damage the inner magnets.
6. Keep all items removed in a safe place
3 x M3 Grub Screws
3 x M3 Grub Screws
Flange Mounting Holes
Drive Thimble
Bearing Cap
End Cap

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STAGE 2 | Mounting the drive
How to install the Flange Assembly:
1. Use an appropriate CONFLAT Gasket
2. Use 6 appropriate length Mounting Bolts and washers (note: only hex head bolts can be used)
3. Place CONFLAT Gasket into flange counter bore
4. Insert MD40 flange assembly
5. Insert bolts and tighten.
Note: when tightening bolts, care must be taken not to tighten
them unevenly as this may cause the gasket not to seal properly.
STAGE 3 | Replace thimble and associated parts.
CONFLAT Gasket
CF40 Chamber Port
Mounting Bolts
Flange Assembly

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How to re-install the Drive Thimble:
7. Push Drive Thimble over the Flange Assembly (take care when re-coupling the magnets –
the magnetic coupling may cause a sudden movement)
8. Replace Bearing Cap
9. Insert and tighten 3 x M3 Grub Screws
10. Replace Dual Shaft End Cap (ensure that the drive pin locates in the drive slot)
11. Insert and tighten 3 x M3 Grub Screws
2.1.5 Bakeout procedure
The manual drives can be baked to 250oC without the need to remove any components.
In the case of the dual shaft version, please refer to the manufacturer’s instructions relating to any
motors/pulleys you may have installed onto the MagiDrive.
End Cap
3 x M2.5 Grub Screws
Bearing Cap
Drive Thimble
3 x M2.5 Grub Screws

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SIDE MOUNTED STEPPER OR DC MOTORISED MD40
2.2.1 Description
The stepper motor option allows for precise position control of the MD40. This can be selected
with optional home sensor or home sensor with limit switches. All options are available with
optional encoder and are plug and play compatible with UHV Design supplied stepper motor
controller (purchased separately).
DC motorised versions may be purchased with a speed and direction control module (must be
specified at time of order). No home, limit or encoder versions are available.
See the drawing section of this manual for dimensional details and detailed motor information.

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Stepper Motor Details
See Technical Reference section for more details.
Motor Specification
23 frame 4 wires 2.8A per phase (gear option 1) 17 frame, 4 wires 1.8A per phase
(gear option 2-4). See Technical Reference section.
Motor Connector
M12 5 pin. See Technical Reference section.
Option 1
500rpm, 1:1 ratio, 1.4Nm, 0.45° resolution per half step.
Option 2
188 rpm, 8:1 ratio, 1.92Nm, 0.113° resolution per half step
Option 3
54rpm, 28:1 ratio, 5.88Nm, 0.032° resolution per half step
Option 4
38rpm, 40:1 ratio, 8.4Nm, 0.023° resolution per half step
Home Sensor
OPTEK slotted opto, wired in PNP configuration
Limit Switches
Honeywell 4SX37-H58 switch wired normally closed.
Limit & Home Connector
LEMO 6 pin wired to WD-S-004. See Technical Reference section.
Encoder
500 line incremental. See Technical Reference section.
Encoder Connector
M12 8 pin. See Technical Reference section.
DC Motor Details
See Technical Reference section for more details.
Motor Specification
24V DC brushed geared motor. See Technical Reference section.
Motor Connector
2P+E. Wired to WD-M-011. See Technical Reference section.
Option 1
230rpm, 10:1 ratio, 1.10Nm
Option 2
115 rpm, 20:1 ratio, 2.21Nm
Option 3
46rpm, 50:1 ratio, 5.04Nm
Option 4
23rpm, 100:1 ratio, 10.08Nm

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2.2.2 Installation instructions
STAGE 1 | The motor assembly and drive thimble will need to be removed in order to gain access
to the flange bolt holes.
How to remove the Motor Assembly:
1. Loosen the Belt Cover retaining screws.
2. Remove the Belt Cover.
3. Remove the Motor mount plate screw.
4. Tilt the motor assembly towards the drive axis to release the belt tension and then remove
the motor assembly.
Note: If any switch options are selected care must be taken when removing and re-fitting the
motor. Make sure the thimble is rotated away from the central position. Otherwise the sensor flag
Belt Cover Retaining
M3 Screws x 2
Belt Cover
Motor Mount Plate
M5 Screw

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will interfere with the home sensor and prevent the motor from being removed or re-fitted and may
damage the switches.
How to remove the Drive Thimble
1. Loosen the 3 x M3 Grub screws that retain the Thimble Cover.
2. Remove the Thimble Cover and Bearing Spacer.
3. Remove Thimble. The thimble requires considerable force to decouple the magnets. Take
care not to damage the inner magnets.
4. Remove Motor Flange Clamp M4 x Screws x 6.
5. Remove Motor Flange Clamp.
Home Sensor
Home Sensor Flag
3 x M3 Grub Screws
Thimble Cover
Thimble
Motor Flange Clamp
M4 Screws x 6
Motor Flange Clamp
Bearing Spacer

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STAGE 2 | Mounting the drive Flange Assembly
How to install the Flange Assembly:
1. Use an appropriate CONFLAT Gasket
2. Use 6 appropriate length Mounting Bolts and washers (note: only hex head bolts can be
used)
3. Place CONFLAT Gasket into flange counter bore
4. Insert MD40 flange assembly
5. Insert bolts and tighten.
Note: when tightening bolts, care must be taken not to tighten them
unevenly as this may cause the gasket not to seal properly.
CONFLAT Gasket
CF40 Chamber Port
Mounting Bolts
Flange Assembly

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Refitting the Drive Thimble
1. Replace Motor Flange Clamp and tighten 6 x M4 Motor Flange Clamp Screws.
2. Push Drive Thimble over the Flange Assembly (take care when re-coupling the magnets –
the magnetic coupling may cause a sudden movement)
3. Replace Bearing Spacer on Thimble.
4. Replace Thimble Cover and tighten 3 x M3 Grub Screws
3 x M3 Grub Screws
Thimble Cover
Thimble
Motor Flange Clamp
M4 Screws x 6
Motor Flange Clamp
Bearing Spacer

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Refitting the Motor Assembly
1. Fit Belt around the Timing Pulley.
2. Tilt motor assembly to engage Pulley with the Belt.
3. Insert and tighten Motor Mount Plate M5 Screw (the belt should be under tension).
4. Replace Belt Cover and tighten 2 x Belt Cover Retaining M3 Screws.
Belt Cover Retaining
M3 Screws x 2
Belt Cover
Motor Mount Plate
M5 Screw
Belt
Timing Pulley
Pulley

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2.2.3 Bakeout procedure
The motor must be removed prior to bakeout following the instructions below.
Preparing for bakeout:
1. Loosen the belt cover retaining M3 screws.
2. Remove the belt cover.
3. Remove the Motor mount plate M5 screw.
4. Tilt the motor assembly towards the drive axis to release the belt tension and then remove
the motor assembly.
Belt Cover Retaining
M3 Screws x 2
Belt Cover
Motor mount plate
M5 screw

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Replacing Motor Assembly after bakeout:
1. Place the belt onto the drive thimble.
2. Hook the motor pulley into the drive belt and then locate motor assembly into position.
3. Replace and tighten M5 Cap Head Screw.
4. Re-install belt cover.
Note, If any switch options are selected care must be taken when removing and re-fitting the
motor. Make sure the thimble is rotated away from the central position. Otherwise the sensor
flag will interfere with the home sensor and prevent the motor from being removed or re-fitted
and may damage the switches.
Home Sensor
Home Sensor Flag

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2.2.4 Stepper Motor Operation
To actuate a Stepper motorised drive it should be connected to an appropriate stepper motor
controller. All mating connectors are supplied to enable fabrication of custom connection cables.
Alternatively a complete solution and all relevant cabling are available from UHV Design.
Homing –Best Practice.
If using a home sensor option then there are some rules that should be followed to
ensure precise and consistent homing or datuming.
Always approach the home sensor from the same direction
If approaching the home at high speed with a high load then the inertia may cause the
sensor to overrun. Best practice is to find the home, then drive off in the opposite
direction, and then creep back to the home sensor at a low speed. This will ensure a more
precise datum capture.