M L Riechers Systems Engineering 530 Main Street Hamilton, Ohio 45013 (513) 844-2220 2 February 2009 Page 1 of 3 working document Subject: rse-2d baseboard changes To: Distribution We re-designed the rse-2d baseboard (also COMCO Part Number BD-1663). These rse-2d baseboards are used extensively on the COMCO Mark III and Mark IV Flexographic Printing Presses. The first parts were released for sale on 16 January 2009. All subsequent parts will be this new design. We did this re-design to improve the performance of the board. These improvements are: 1. The board went from two layers to four layers. This allowed us to incorporate extensive ground and power planes both in the inner and outer layers. The outer layers now consist almost entirely of ground plane, which markedly reduces the board's vulnerability to Electromagnetic Interference (EMI), and enhances signal propagation. Also, the extensive power planes reduce the power current impedance, making for more reliable and "quiet" power distribution. 2. We took care to reduce and eliminate routing loops. This markedly reduces the board's vulnerability to magnetic interference. 3. We incorporated a method to invert PNP Photo Eye signal edges. Normally we expect the Photo Eye to generate high to low (falling) electrical signal edges when it detects a Web or Roll mark, and the majority of the Photo Eyes do it that way. However, certain Mark series presses were sold with "PNP" Photo Eyes, which do it backwards: this type Eye produces a low to high (rising) electrical signal edge when it detects a Web or Roll mark. The new board extends the Register Termination Resistor Packs R7's and R8's sockets from 8 to 11 positions. The Termination Resistor Pack is still only an 8 position resistor pack (SIP), but it is special. 4. The Communications Termination Resistor Pack and J7 and J8 have changed location from near CN2 to near CN4. We did this to get a more direct termination (Output Side instead of Input Side). The board has changed. You have to be careful to note and abide by these changes: 1. As noted above, Resistor Packs R7 and R8 have changed. For the normal NPN Eye, the SIP should be loaded with its pin 1 in the R7 or R8 sockets Pin 1, leaving the three right-most pin positions in R7 or R8 empty. We pre-load each board with a SIP assuming NPN type eyes. If you have PNP eyes, remove the resistor pack (SIP) from R7 or R8, turn it 180 degrees, and re-insert it into Socket R7 or R8 with the resistor pack's (SIP's) pin 1 inserted into Socket R7's or R8's Pin 11. That will route the Photo Eye's signal into the rse-2(b, c, or d)'s inverting input. Then re-set the Photo Eye to transition on the proper mark edge (usually light to dark). Normal install for NPN eyes: ________________ |________________| | | | | | | | | 1 8 o o o o o o o o o o o 1 11 Install for PNP eyes: ________________ |________________| | | | | | | | | 8 1 o o o o o o o o o o o 1 11 2. Connectors CN7, CN8, and CN9 have changed position from: ________________________ | CN11 | |_______________________| _______________________ ________________________ | CN7 | | CN8 | |______________________| |_______________________| ________________________ ________________________ | CN9 | | CN10 | |_______________________| |_______________________| to: ________________________ | CN11 PR Gear | Eyes | |_______________________| ________________________ ________________________ | CN8 Ana Op | Lin mtr | | CN9 Ana Gear | |_______________________| |_______________________| _______________________ ________________________ | CN7 Hand Enc | Alrms| | CN10 Pr Op |Axi Mtr | |______________________| |_______________________| in a sort of rotation. You will have to re-plug your cables into these connectors to "follow" the rotation. CN11 and CN10 have _not_ changed position. NOTE:::NOTE:::NOTE:::NOTE:::NOTE These connectors do what they always did by name. They have just changed position. That is, CN7 used to be for the Hand Encoder and Alarms. It still is. It's just changed position. CN8 used to be for the Analox Operator side motor control or for the registration Linear Motor. It still is. It's just changed position. CN9 used to be for the Analox Gear side motor control. It still is. It's just changed position. CN10 used to be for the Print Roll Operator Side motor control, or for the registration Axial Motor. It still is. And it's _NOT_ changed position. CN11 used to be for the Print Roll Gear Side motor control, or for the Photo Eye inputs. It still is. And it's _NOT_ changed position. Also, please note that we've labeled the connectors to indicate their function. -- Kind Regards, I am /s/ Michael L. Riechers Michael L. Riechers, Owner, M L Riechers Systems Engineering 513/844-2220 (voice) 530 Main Street 513/205-5589 (cell) Hamilton, Ohio 45013 513/844-2279 (fax) mlr@rse.com (internet) www.rse.com (WEB) Systems Programming: The three most adverse malignancies in life are: 1)signed numbers, 2)floating point numbers, and 3)little endians.