WEMAS MT 32 CNC Lathe -> LinuxCNC - Mesa or EtherCAT?

Hello and thank you both for the response.

I saw that the ethercat Beckhoff encodermoduls are really not cheap Maybe a mixed setup with mesa would be an option? time will tell. My main Headache toipic is still the drivers for the Motors,

I allready have some parts of the SIEMENS S120

-Single Motors Modul for the spindle
-Double Motor Modul vor the X and Z Servo
-Active lIne modul
-Breakresistor
-Filter
-Motor choke


Now I have to search for CU320-2 on Ebay. and for the Ethercat modul wich is sadly really expensive.

If i dont get the ethercat PCB i think i also could run it with the ans SMC30. but that would mean i only have step dir. All functions form the ethercat world would of course be really cool!


endian, you say: profibus .. over ethercat ... the 2ms synchro ... I dont have a feeling for that. But ms sounds "slow" is that fast enough for Positioning a CNC machine?
Taht sounds really interesting, can you tell me more about it? Is there a Thread with your machine?


Have a great day!


Tom

hi there,

I have a long talk with gentelmen from the beckhoff which are talking that 2ms is for them limit of RT control ... I am experimenting with the 7 axis over profibus and there is latency 1336us, but I have not tested them ever... I have setted them to 2ms 

I think for 3 o 4 axis it should be less then 1ms in the optimalized profibus cycle with equidistant mode active... I am running old metronix servopacks over speed loop... Everything works well even homing procedure but I think it is not for extremly precise machines probably I will facing the limits in the future but that servopacks was for 40bugs at locat market place

I have configure CanOpen, profibus, profinet over ethercat too but profinet have terrible delay 4ms which are not enough for anything ... or use the IRT profinet with 31.25us latency(there is limitation of 5 or 6 device on the network) but you will need special interface from continental which is only dealer of them

My machine is running at mesa 7i77 + linear scales, next running kollmorgen packs at 250us + linear scales, next nidec stuff too at 250us{not all stuff integrated as driver build in probing} and now I am experimenting with profibus ... 

S120 is profi solution on 31.25us drivecliQ bus but it is soo soo expensive ... EtherCAT should runs at 62.5us but need native stuff and I have never tested them that fast... probably there will be limitations of lcnc latency hw itself

regards 

I have a lot of mechanical work on the machine. Cutting and welding on the housing to get it smaller. maybe i will post pictures later if you are interested.

The plan for the drives at the moment is to use the SIEMENS Drivers if i can manage them to run... i think at least the Step Dir Config via SMC30 should be possible. But i would love to use ethterCAT like in this example.

support.industry.siemens.com/cs/document...p-pn-?dti=0&lc=en-WW

 

I have some experience with Mesa. After learning LCNC and help of great people like Talla83 and many more, my Deckel FP3NC runs really nice with it. 


But i am a complete NOOB with EtherCAT. And to be honest, i am a little bit afraid of it.
So i hesitate to buy a used few hundred euro PCB for something i have no glue of

Nice nice nice... This document is tasty and it is a new galactic space for everyone from us... 

Sinamics are widely used for everything and they are very powerfull.. 

every shared picture is are helpfull i think if you will need help I am here for everyone.. i will create a dry project in the twincat3 to check configuration ...

 

What do you mean with "SoE"?
Maybe i try to get a used Beckhoff AX5xx from eBay when thats easyer to use with LCNC.

... the SIEMENS etherCAT pcb is hard to get. it starts to annoying me...


endian post=327010 userid=29161

AX5xxx from beckhoff is SoE and it can be pain to create custom .xml which should be editable out of Sachas own .xml files...

 

What do you mean with "SoE"?
Maybe i try to get a used Beckhoff AX5xx from eBay when thats easyer to use with LCNC.

... the SIEMENS etherCAT pcb is hard to get. it starts to annoying me...


endian post=327010 userid=29161
AX5xxx from beckhoff is SoE and it can be pain to create custom .xml which should be editable out of Sachas own .xml files...
 

SoE does mean - Sercos over Ethercat ... similar to CoE - CANopen over Ethercat ... You can imagine that ethercat itself is a empty lorry train were many different buses/networks shape members can sit a transport itself where they are need ..but very fast, synchro and with many many diagnostic stuff

I have never creating custom .xml file for them only for CoE stuff I have done it... I think if you are basic user it should be enough for you to use .xml config from saschas shop but ... it has many many very usefull stuff as monitoring the native I/Os ... external encoder - basically for external encoder as linear scales to run velocity loop over them ...