I found this explanation of what a push pull output is.. https://www.dynapar.com/knowledge/encoder_output/
still doesn't make that much sense but I am sure it will all come together. On Sat, May 2, 2020 at 2:14 PM andrew beck <[email protected]> wrote: > 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
