Platform control for injection molding machine
1. Product Overview
Multi-mold rotary injection molding machine is a special type with multiple operating station, mold closing process equipped rotary disk platform. This type of injection molding machine provide full plasticizing capacity of the injection device, can shorten the production cycle and improve the production capacity. According to its structural characteristics can be divided into horizontal and vertical machine.
2. Product features and performance
1) Fast response speed.
2) Smooth rotation, smooth accelerate and decelerate, small impact.
3) Compensate backward gear clearance, high positioning precision.
4) Capable of bad working conditions.
5) Easy use, easy maintenance.
3. Rotary platform servo scheme
According to filling quantity and rotation angle, multi-mold rotary injection molding machine can be divided into: two injection stations, three stations, four stations, six stations, eight stations or more.
Stars Technology rotary platform servo scheme mainly includes two parts: servo motor and servo drive. And the drive is designed from actual requirement of injection molding machine control.
Through specialized algorithms and control procedures, upper computer only need a small amount of IO to achieve rotary platform servo control, simple and convenient, so the integration, installation, adjusting, maintenance of injection molding machine becomes much easier.
4. Rotary platform servo control wiring
1)Drive interface function
Interface
Foot
Code
Interface name
Function
Digital interface X1-1
1
MCOM
Relay public interface
2
MC
Relay normal closed interface
3
MO
Relay normal open interface
4
+24V
External +24V power supply
5
COM
Digital input grounded/Power supply input grounded
Digital input grounded
6
DI6
Digital input 6
Platform positive rotate command
7
DI5
Digital input 5
Platform negative rotate command
8
DI4
Digital input 4
Platform reset command
9
DI3
Digital input 3
Drive enable
10
DI2
Digital input 2
Platform reset switch
11
DI1
Digital input 1
Emergency stop
12
DCOM
Digital output grounded
Digital output grounded
13
DO3
Digital output 3
Rotate command complete(positive and negative)
14
DO2
Digital output 2
Reset complete
15
DO1
Digital output 1
Error
Analog interface X1-2
16
M+
Motor overheat protect+
17
M-
Motor overheat protect-
…
…
21
FC2
Analog input 2-
Platform speed setting
22
AI2
Analog input 2+
…
…
30
2)Rotary platform wiring
3) Main parameters setting
Parameter code
Parameter name
Parameter range
Parameter instruction
PD30
Positive rotate angle
0～360.00
Platform positive rotate 1 station
angle setting, unit: degree
PD31
Negative rotate angle
0～360.00
Platform negative rotate 1 station
angle setting, unit: degree
PD32
Accelerate ratio
0～50.0%
Accelerate angle for 1 station’s percentage
PD33
Decelerate ratio
0～50.0%
Decelerate angle for 1 station’s percentage
PD34
Origin offset
-180.00～180.00
Origin position from origin switch rising angle offset
PD35
Origin searching mode
0-2
0：positive rotate searching；1：negative rotate searching；2：positive&negative searching，when select 2，positive rotate
to 180 degree, if can not find the origin, motor negative rotate searching.
PD36
Negative clearance compensation
-10.00～10.00
Set negative clearance compensation value, to adjust positive platform
position error. Unit: degree。
PD37
Transmission ratio Numerator
0～65535
Motor to platform transmission numerator
PD38
Transmission ratio denominator
0～65536
Motor to platform transmission denominator
5. Application examples
1) Vertical injection molding machine, the requirements are as follows: The total Transmission ratio is 105.
2) 3 station, working mode: 120 degrees, the true story of 120 degrees, reversing the 240 degrees.
3) The positioning error of the gear backlash is 0.16 degrees.
Parameter settings are as follows:
PD30 120 positive rotation angle
PD31 240 reverse angle
PD32 30 acceleration percentage (adjustable)
PD33 30 deceleration percentage (adjustable)
PD34 X origin offset, define zero offset from the original switch angle, according to the actual setting
PD35 0 positive rotate search origin
PD36 0.16 Negative clearance compensation, according to the actual setting
PD37 105 Transmission numerator ratio
PD38 1 Transmission denominator ratio
