Cut-To-Length Machines

Cut-to-length or sheeting machines have a wide application in a number of industries including paper making, packaging, plastic films, metals and rubber. One cut-to-length system upgrade done by Optima featured replacing:

  • Conveyor drive
  • Conveyor gear-motor
  • Band-saw linear actuator drive
  • Band-saw linear actuator
  • Band-saw motor
  • PLCs
Click here to read the full description

Product is fed off the last conveyor of the production line through the dancer and onto the cut-to-length infeed conveyor. When running the conveyors operate at a set line speed trimmed by feedback from the dancer. The cut-to length system operates in manual or automatic modes. In manual mode it cuts the product by stopping the conveyors, driving the band-saw down and then up and then restarting the conveyors. In automatic mode the conveyors are driven at linespeed trimmed by feedback from the dancer for an operator settable distance. The conveyors stop at the set distance and the band-saw is driven down to cut the product, the band-saw is then driven up and the conveyors restarted repeating this operation.

To change the band-saw blade requires a foot-pedal inside the guards to be held down to energise the hydraulic pack and then a pushbutton to be pressed which releases tension on the blade. Once the blade tension is released the foot-pedal is released turning off the hydraulic pack preventing further motion, then the blade tension release button is released. The blade can then be replaced. To re-tension the hydraulic pack the footswitch is pressed again until sufficient tension is on the blade.

Optima’s control system solution:

The band-saw was previously driven by a hydraulic motor, a fixed speed AC electric motor was supplied to replace this. The band-saw was tensioned using a hydraulic system, this was retained. The existing dancer was of a counter-balanced design with preset pneumatic dampers, it was retained. The infeed and outfeed conveyors were mechanically linked together and driven by a single motor. A servo motor was supplied to replace this. The length of the product was measured using a new encoder which was supplied for fitting in the place of the existing encoder on the infeed conveyor.

The operator was to control the cut-to length process using a HMI mounted on the operator panel.

Would you like to know more about other control system projects we have completed on cut-to-length machines? Please, leave us a short message here and we will send you additional information within 24 hours!

Download PDF Version

Recent Posts

Drive System Retrofit for MasterDrives

Because of their superior functionality, comprehensive performance range and application flexibility, the Siemens Simovert MASTERDRIVES in CUVC, CUMC, Compact form and other variants has been a very successful drive system for single motor and multi-motor applications. The established common DC bus system enabled it to be used on demanding production machine processes across a wide range of industry sectors.

All good things must come to an end, but that doesn’t mean the end of the line for your production machine.

Optima’s innovative approach to upgrades significantly reduces the installation time and minimises risk to your site. All of our systems are thoroughly tested before they are shipped to site, completely eliminating any “out of box” failures.

Some of the benefits you will realise are:

  • Extended life span of your machine and increased availability due to continued spare parts supply with full support by Siemens
  • Improved productivity through lower energy costs and faster production cycles, through:
    • Simple operation monitoring using operator panel
    • User-friendly diagnostics with the STARTER tool
    • Additional interface options via PROFINET or PROFIBUS
  • Future-proofed due to access to the new world of TIA Portal

Optima’s approach for upgrades is to:

  1. 1.Analysis of your current machine configuration and potential further customer request
  2. Recommendation on the best replacement scenario
  3. Installation, configuration and commissioning of new  components and creation of circuit diagram and documentation
  4. Acceptance test and machine handover.

If requested, we can also provide training for all your relevant engineers and instruction of the operating personnel

Why Optima?

  1. We’ve been upgrading complex drive systems for over 20 years
  2. We are one of only 7 authorised Siemens Drives and Motion partners in the UK
  3. We provide a complete solution provided by one retrofit supplier including mechanical installation of motors and/or supply of adaptor plates and flanges to suit
  1. Don’t replace old for old. Replace old for new at a similar cost (including conversion) Leave a reply
  2. Weekend shutdown sees pump system upgraded to latest Siemens Sinamics drives and S7-1200 PLC Leave a reply
  3. First Batch of UL-Control Panels Finished and ready for shipping to the USA Leave a reply
  4. Improved Performance And Reliability Following Upgrade From Hydraulic Motors To AC Geared Motors Leave a reply
  5. Government Launches it’s “Made Smarter” Review 2017 Leave a reply
  6. Pepperl+Fuchs Innovation Tour arrives at Optima on the 14 November from 11.00 – 14.00 Leave a reply
  7. Automax and PLC 5 to PowerFlex Drives and Control Logix Upgrade on Metalliser Leave a reply
  8. Optima’s upgrade solution for a Sirpak 200 cut-to-length Machine system reduces waste by 9km per week Leave a reply
  9. Metal Decorating Press Upgrade using Siemens Simotion S120 + D425 controller + Simatic S7 PLC Leave a reply