GUDEL Memolub PLCD User manual
SERVICE MANUAL
Automatic lubrication system
Memolub PLCD (24 V DC)
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Year of manufacture:
SERVICEANLEITUNG AUTOMATIC LUBRICATION SYSTEM MEMOLUB PLCD (24 V DC)9007199348992139_V2.0_EN-US
B1X.XXXXXXXX
101XXXXX
2019
© GÜDEL
Translation of the original instructions
This manual contains standard illustrations that may deviate from the original.
In the case of special models, options, or technical changes, the scope of deliv-
ery may differ from the descriptions here. Reprinting the instructions, in whole
or in part, requires our permission. Subject to change due to technical im-
provements.
9007199348992139_v2.0_EN-US
Revision history
SERVICE MANUAL Automatic lubrication system Memolub
PLCD (24 V DC)
9007199348992139_v2.0_EN-US
4
Table of contents
1 Safety 7
1.1 General ............................... ................................ 7
2 Design, function 9
2.1 Design................................ .................................9
2.2 Position of the encoder .............................................10
2.3 Function ............................................................. 10
2.3.1 Control................................................................ 10
2.3.2 Functional description of progressive distributor..........................11
2.3.2.1 All outputs open........................... ............................14
2.3.2.2 Output closed .........................................................15
3 Commissioning 17
3.1 Connecting PLCD ......................... ..........................17
3.2 Programming........................................................ 18
3.2.1 Signal waveform over time.............................................. 18
3.2.2 Suggested solution: Programming software...............................19
4 Operation 21
4.1 Setting the lubrication cycle / lubrication quantity................ 21
4.1.1 Lubrication quantity ...................................................21
5 Replacing the cartridge 23
6 Lubricants 25
6.1 Lubrication ............................ ..............................25
6.2 Lubricant table ...................................................... 26
Table of contents
SERVICE MANUAL Automatic lubrication system Memolub
PLCD (24 V DC)
9007199348992139_v2.0_EN-US
5
1 Safety
1.1 General
Read the entire manual before working with the product. The manual con-
tains important information for your personal safety. The manual must be
read and understood by all persons who work on the product in any of the
product life phases.
Read the Safety chapter of the superordinate manual before working with the
product. It contains important information for your personal safety. The
chapter must be read and understood by all persons who work on the prod-
uct in any of the product's phases. You are obligated to implement the infor-
mation and warnings it contains, wherever they pertain to the product.
Safety
SERVICE MANUAL Automatic lubrication system
Memolub PLCD (24 V DC)
9007199348992139_v2.0_EN-US
7
Safety
SERVICE MANUAL Automatic lubrication system Memolub
PLCD (24 V DC)
9007199348992139_v2.0_EN-US
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2 Design, function
2.1 Design
The automatic lubrication system of the drive module consists of a small lubri-
cant dispenser with progressive distributor with several outputs. The auto-
matic lubrication system lubricates the guideway and rack of the equipped
axes automatically. The lubricating pinion unit lubricates the rack. The wiper
and lubrication unit lubricates the guideway.
A
B
C
E D
Fig.2-1 Design of the MEMOLUB automatic lubrication system
A Lubricating pinion unit D Progressive distributor
B Wiper and lubrication unit E Lubricant dispenser
C Lubrication line
Design, function
SERVICE MANUAL Automatic lubrication system
Memolub PLCD (24 V DC)
9007199348992139_v2.0_EN-US
9
2.2 Position of the encoder
A
Fig.2-2 Position of the encoder
A Encoder
2.3 Function
Lubrication is an important part of the maintenance.
The following are the most important elements for achieving effective lubrica-
tion to optimize productivity:
• Lubricant dispenser
• Lubrication point
• Lubrication quantity
• Lubrication cycle
MEMOLUB is a powerful (25 bar) and precise electro-mechanical lubricant
dispenser. The lubrication is centralized and automated. The lubricant is con-
tained in a cartridge. With the progressive distributor, several points can be
lubricated simultaneously.
2.3.1 Control
For regular lubricant dispensing, the lubricant dispenser needs to be con-
trolled by a PLC. To this end, a pulse rhythm needs to be sent for every lubri-
cation cycle, by means of a control signal. Güdel recommends the following
program sequence Ü219
Design, function
SERVICE MANUAL Automatic lubrication system Memolub
PLCD (24 V DC)
9007199348992139_v2.0_EN-US
10
2.3.2 Functional description of progressive distributor
The progressive distributor evenly distributes the incoming lubricant to all
outputs that are in use. If an output is closed, the output on the opposite
side from it will discharge double the quantity of lubricant.
I
II
III
A B C
E DF
Fig.2-3 Function of the progressive distributor 1
A Left changeover line D Piston
B Main line E Ring groove
C Right changeover line F Lubricant
From the main line, the lubricant flows through the right-hand ring groove of
piston III. The changeover line moves piston I to its right-hand end position.
The lubricant displaced by piston I goes through the left changeover line and
exits at output 6.
Design, function
SERVICE MANUAL Automatic lubrication system
Memolub PLCD (24 V DC)
9007199348992139_v2.0_EN-US
11
I
II
III
Fig.2-4 Function of the progressive distributor 2
After piston I has moved, lubricant flows to the left side of piston II and
pushes the piston to its right-hand end position. The displaced lubricant exits
through output 1.
I
II
III
Fig.2-5 Function of the progressive distributor 3
After piston II has moved, lubricant flows to the left side of piston III and
pushes the piston to its right-hand end position. The displaced lubricant exits
through output 2.
Design, function
SERVICE MANUAL Automatic lubrication system Memolub
PLCD (24 V DC)
9007199348992139_v2.0_EN-US
12
I
II
III
Fig.2-6 Function of the progressive distributor 4
After piston III has moved, lubricant flows to the right side of piston I and
pushes the piston to its left-hand end position. The displaced lubricant exits
through output 3. The progressive distributor continues to follow the func-
tional sequence as described, until all outputs have been supplied with lubri-
cant.
As long as pressure is generated by the lubricant, the entire procedure keeps
repeating in the progressive distributor.
Design, function
SERVICE MANUAL Automatic lubrication system
Memolub PLCD (24 V DC)
9007199348992139_v2.0_EN-US
13
2.3.2.1 All outputs open
The progressive distributor evenly distributes the incoming lubricant to all
outputs. The opposite outputs are operated by the same piston. For the iden-
tical conveying volume to be output at the opposite outputs, the headless set
screw must close the connecting passage of the two outputs. The progressive
distributor is normally supplied ex works with the headless set screw fitted.
1
3
4
5
6
2
0.2cm3
0.2cm3
Output
Output
Piston
The same conveying volumes are output by the piston at output 1 and
output 2. The connecting passage between the two outlets is closed
with the headless set screw.
Headless set
screw
Connecting passage
Fig.2-7 All outputs open (the internals of the progressive distributor are shown in simplified form)
Design, function
SERVICE MANUAL Automatic lubrication system Memolub
PLCD (24 V DC)
9007199348992139_v2.0_EN-US
14
2.3.2.2 Output closed
The connecting passage between opposite outputs is closed with a headless
set screw ex works. In some cases, outputs on the progressive distributor
may be closed. The headless set screw must then be removed. As a result, the
piston conveys twice the volume to the open output.
NOTE
Lubricating film missing
If an output is closed without removing the headless set screw from the con-
necting passage between the opposite outputs, the progressive distributor
will not work. The piston cannot move. A missing lubricating film on guide-
ways and racks leads to damage to the product. This results in operational
failure.
1
3
4
5
6
2
0 cm3
0 cm3
Output closed
Output
Piston
Output 2 is closed. The connecting passage between the two outlets
is closed with the headless set screw. The piston is blocked by the
enclosed conveying volume. The progressive distributor does not
work.
Connecting
passage Headless set
screw
û
• Always remove the headless set screw from the connecting passage if you
want to close the outputs
Design, function
SERVICE MANUAL Automatic lubrication system
Memolub PLCD (24 V DC)
9007199348992139_v2.0_EN-US
15
1
3
4
5
6
2
0 cm3
0.4 cm3
Output closed
Output
Piston
Double the conveying volume is output by the piston at output 1.
Output 2 is closed. The connecting passage between the two outlets
is open.
Connecting
passage
ü
Fig.2-8 Output closed (the internals of the progressive distributor are shown in simplified form)
Design, function
SERVICE MANUAL Automatic lubrication system Memolub
PLCD (24 V DC)
9007199348992139_v2.0_EN-US
16
3 Commissioning
3.1 Connecting PLCD
Connect the automatic lubrication system as follows.
The interface electronics of Memolub reacts very sensitively to low voltage
levels. The low voltage levels can be caused by the semiconductor electronics
of output boards.
M
BU BN
BU BK
M12
5p
3
3
4
4
0V 24V
1234
BK
BU
BN WM
Cable supplied by
customer
Memolub
Current consumption: 0.1 - 0.2A
Cable length: 0.2 - 1.5m
Plug - Pin
Feedback of encoder
0V
Motor start 24 V DC
0 V
Feedback
24 V DC +
Fig.3-1 Connecting PLCD
Commissioning
SERVICE MANUAL Automatic lubrication system
Memolub PLCD (24 V DC)
9007199348992139_v2.0_EN-US
17
3.2 Programming
3.2.1 Signal waveform over time
The signal waveform over time for the motor (output) and encoder (feed-
back) is as follows.
The encoder reports a complete pass through the progressive distributor,
with two edge changes. The software therefore has to react to the second
changing edge at the feedback input.
25 min 30min20min15min10min5min
10s
10s
25 min 30min20min15min10min5min
10s
25 min 30min20min15min10min5min
10s
10s
Motor:
Motor:
Motor:
Encoder:
Encoder:
Encoder:
Start
Start
Start
Normal case
Fault
Fig.3-2 Signal waveform over time
Commissioning
SERVICE MANUAL Automatic lubrication system Memolub
PLCD (24 V DC)
9007199348992139_v2.0_EN-US
18
3.2.2 Suggested solution: Programming software
Start
Pump fault? /
Cartridge empty? Set warning message**
Yes
Indicator
reached? / Manual
start?
Yes
No
No
Pump ready?*
Yes
No Indicator
(distance; cycle number;
time)
started?
Yes
Set flag for machine stopStart lubrication cycle
Successful? (no
timeout)
Yes
No
Reset warning
Reset flag for machine stop
Set warning message**
** = Reset corresponding warning message as soon as OK again
* = No fault (5 s input) AND not empty AND lubrication cycle not started
No
Fig.3-3 Automatic lubrication system flowchart
Commissioning
SERVICE MANUAL Automatic lubrication system
Memolub PLCD (24 V DC)
9007199348992139_v2.0_EN-US
19
Commissioning
SERVICE MANUAL Automatic lubrication system Memolub
PLCD (24 V DC)
9007199348992139_v2.0_EN-US
20
Table of contents
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