Friday, April 27, 2007

ICTS-The arrival of the actual conveyors

Enviro send over the CvB(6 foot), CvC (12 foot), and CvD (12 foot) yesterday. Infact they had an option not to send them yet as we agreed on terms that we can only get if the RM18K checkque is ready. However, since they trust us (Oversea), so they keep their promise to complete the job before end of the month and send it over even we are not ready yet. As a matter of facts, the payment has been arranged already. Its a matter of checkque signatures and quality inspection that delay the payment.

Anyway, after observing and testing the new conveyors, we found several discrepancies from the actual design. Here are they :
1- The width. The design width is 150mm including the sides aluminum profile. This is simply because the diagonal length of the big mooncake trays is about 130mm. Considering the aluminum profile sides is about 10mm each, so the total width should be about 150mm. However, the new built conveyor total width is 220mm. They fabricate a 150mm with belt with additional 30mm both sides as aluminum support profile, adding unnecessary 60mm width for a total width of 220mm. The good thing about this is we get a bigger conveyor for a small conveyor cost. This is OK for future expansion or product size variations. The bad thing is for this application, we have to add some sort of guides just to ensure that the mooncakes is aligned at respective position which is extra job for us.
* THIS PROBLEM IS DUE TO THE STANDARD SIZE OF THE END ROLLER THAT DOESNT REALLY MATCH OUR REQUIREMENT OF 150mm TOTAL WIDTH. THE NEXT SMALLER ONE IS LESS THAN 120mm REQUIRED BELT WHICH IS NOT WIDE ENOUGH FOR OUR APPLICATION.

2- The belt. As promised, this time we get a glossy white belt. The old conveyors are nonglossy green and a bit more sticky. While the green conveyors are a bit thicker and flat, the white glossy are thinner and not fully flat. Both sides of the white belt are wrinkled a bit and not smooth. What more the belt are not tighten yet.
* THE BELT SHOULD BE FLATTEN ENOUGH ONCE IT IS TIGHTEN ACCORDINGLY.

3- The speed. New conveyors run much faster than the previous conveyors. The the old one can run up to 13m/min, the new one should be more than 15m/min.
* THE ACTUAL TOP SPEED IS ATTAINABLE ONCE THE TEST IS BEING DONE.

4-The height. The old conveyors have one option to adjust a tolerance of about 50mm on top of the fixed height. The new once have 2 height tolerance adjustment for about 200mm on top of minimum height of 900mm. The required height is about 1030mm.
* THE OPTIMUM HEIGHT WOULD BE SET ONCE THE FINAL LAYOUT IS CONCLUDED.

5- The control power supply serial connection. Supposed they promised to add a connection so that we dont have to modify for the inverter power supply control. However upon inspection it seems like they forget to install that serial control connection. This means, we have to modify our own.
* THE AC POWER SUPPLY CONTROL FOR THE CONVEYOR WILL BE IMPLEMENTED USING AC SUPPLY SOCKET EXTERNAL WIRING.

6- The side nuts. They promised to supply for us for easier installation of the guides. They did put, but only a few. What more the sides aluminum profiles nuts rail are being blocked by the conveyor bodylock to the profiles.
This means that we have to install on our own few more nuts for better linkage with the conveyor cover.
* SEVERAL MORE NUTS WILL BE ADDED ACCORDINGLY

Next Stage Progressive Planning
Since the prototyping task is completed already where the objective is already met, so yesterday Mr Yu TT list out a few short terms task to do. They are :
1- Reproduction of the conveyor and pusher schematic diagram individually. This is to ensure that all members are capable of troubleshooting in case of machine faulty in future.
2- Assemble the new conveyors for production use according to the specified layout approval.
3- Prepare the necessary accessories for PLC control deployment to replace the current hardwires control system.
4- Analyse the optimum new conveyors speed, gap between mooncakes to match and syncronised with existed 45 unit per minute of the packaging machine running speed.
5- Arrange a necessary training on electrical and electronics as well as computer interfacing for Norjo so that he would have hands on experience more on instrumentation engineering job.
6- Complete the packaging machine block schematic diagram as soon as possible.
7- Arrange Brazer Engineering to prepare a troubleshooting manual and practical training for the Thermal Oil Heater.

1 comment:

albina N muro said...

Applications where a conveyor is being driven in a repetitive ..... synchronize both axes of motion on one card .... Unfortunately, custom prototype bits made. bespoke conveyors

Hangman