Scope:
To allow the machine to cater for a 5th input. Since such modification was in order, in agreement with the customer, we also proceeded with a complete overhaul of control system and implemented a solution to improve the production rate. Reengineering of all control systems to achieve maximum automation level and minimize human intervention.
Type of business:
Medical devices
Customer:
Health care company
Service:
Machine re-design, construction, commissioning and ongoing support
End user training and documentation:
Provided
The challenge:
The existing machine had 4 different inputs for the filter sizes. The customer needed to add a 5th input to cater for a new part. The existing machine had many many years of service and, therefore, the new PC protocol could not establish connection.
The Control cabinet for a filter making machine, was one of the projects that we at JMartans undertook in 2020. After a free consultation meeting with the customer, we proposed our solution for the redesign and reengineering of their existing machine.
To realize this project we used top quality equipment from Beckhoff Automation , Siemens and, for the safety, PNOZ X2 from PILZ.
From the HMI the technician can diagnose the current status of all field devices and operate each of them manually, if the required conditions for the devices are satisfied. Furthermore, the supervisor can monitor how many parts are produced daily and how many parts are produced per hour.
The machine sequence is as follow:
- On power up the customer chooses a recipe and enables the required stations for the selected recipe.
- Index tape with length A (A being recipe length + excess length)
- Hold tape for time Z
- Cut for time X
- Heater down/up and stay in position (alternating every cycle)
- Welding-on for time Y
- Restart cycle indexing with length B (B being recipe length).
The machine will stop and notify the operator when the batch count is reached.
A Siemens 1-phase semiconductor relay was used to control the heating element voltage. The use of a solid-state relay means that the switching action time is much faster than a normal switching contactor.
EL1809 digital input terminal acquires the binary control signals from the process level and transmits them, in an electrically isolated form, to the higher-level automation device.
EL2809 digital output terminal connects the binary control signals from the automation device on to the actuators at the process level with electrical isolation.
EK1101 coupler to connect EtherCAT with the EtherCAT Terminals (ELxxxx). A station consists of coupler, any number of EtherCAT Terminals, an bus end cap or an EK1110 EtherCAT extension.
EL3681 digital multimeter terminal enables measurement of currents and voltages in a wide input range. The measuring ranges are switched automatically.
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