69FIREBIRD
Member
Hi All, I've been asked to design a CHEAP and “accurate” cut off system for a tube mill. Thought I’d put this out there for some feedback – perhaps save reinventing the wheel so to speak.
Basic principle is the length is predefined by down stream detector once activated a cut off saw accelerates alongside on a parallel track aiming to match the tube mill production speed and then cuts the tube. Then the cut off saw returns home for next cut. Mill production rate is slow at approx 6m per min.
Based on the cheep nature of the job I’m looking at the AB Micrologix range. Using an encoder or tacho to measure the production speed of the tube mill and get analog or Modbus feedback from a VSD to confirm speed match before cutting. It has been suggested that the cut is accompanied by a prior clamp to tube and electric / pneumatic drive disengage of the cut off saw drive mech. to avoid any issue with precise synchronisation.
· Has anyone achieved this sort of thing before?
· How do I accuracy and continuously calc line speed using an encoder?
· Any other points of potential failure of accurate measurement / speed matching?
Thanks in advance.
Basic principle is the length is predefined by down stream detector once activated a cut off saw accelerates alongside on a parallel track aiming to match the tube mill production speed and then cuts the tube. Then the cut off saw returns home for next cut. Mill production rate is slow at approx 6m per min.
Based on the cheep nature of the job I’m looking at the AB Micrologix range. Using an encoder or tacho to measure the production speed of the tube mill and get analog or Modbus feedback from a VSD to confirm speed match before cutting. It has been suggested that the cut is accompanied by a prior clamp to tube and electric / pneumatic drive disengage of the cut off saw drive mech. to avoid any issue with precise synchronisation.
· Has anyone achieved this sort of thing before?
· How do I accuracy and continuously calc line speed using an encoder?
· Any other points of potential failure of accurate measurement / speed matching?
Thanks in advance.
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