Hi guys me again
I have just received my schiender vfd encoder card from ebay for my spindle encoder feedback to linuxcnc I was just looking at it and it seems the encoder card only has differential A and B inputs- It doesn't have a index counter. obviously to make the spindle orientation work I need to be able to read the index pulse from the encoder. I was thinking maybe the best way to do this would be to get a ENCY mesa board and connect my encoder to that. then connect the one of the outputs from the board to linuxcnc encoder counters. the other split output can go to the vfd for closed loop control inside the vfd (I will only use the A and B pulses inside the vfd.) My vfd supports closed loop control if I have can get the encoder counting back into the vfd and I will get 200 percent of the full torque at 0 rpm which is pretty cool. It should be almost like a servo. does this all seem like a good idea to people? and has anyone ever used the ENCY mesa card? I am not sure how to power it. Eg do I power it from my mesa card encoder 5v or from the vfd . I guess I can't power it from both. this is the encoder card I have. needs to be used with a 12 v encoder. the max hz is 300khz which I calculated at 1000ppr allows me a max speed of 18000 rpm. I can get a 1000ppr encoder from my chinese servo supplier that allows up to 10k rpm which is what my max spindle speed is. and I think I can get a 12 v version. I am not sure what push pull outputs are though. https://www.se.com/nz/en/product/VW3A3405/encoder-interface-card-with-push-pull-outputs---12-v-dc/ and a pdf that shows the connections VW3A3405 ENCODER CARD <https://download.schneider-electric.com/files?p_enDocType=Instruction+sheet&p_File_Name=1755538.pdf&p_Doc_Ref=1755538> regards Andrew _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
