Centroid Community CNC Support Forum

Hi guys as the title says I am planning on retro-fit a Centroid system on to my 1997 Deckel-Maho DMU 50T. It is a 3 axis machine with 2 manual axis’s on the table. 16pos ATC

Currently has the following controls and drives.
* Heidenhain TNC 426 cnc controller
* Siemens 611 drives fitted with a Heidenhain interface control card / board.
* Siemens Servo motors – 1FK6 series with 1Vpp encoders feed back direct to the TNC
* Siemens spindle motor - 1PH6 series with 1Vpp encoder fed back direct to the TNC
* Heidenhain LS486 linear scales on the X, Y, Z. +-5um accuracy ( I think, still looking for exact specs on these)
*Manual axis’s have Heidenhain ROD280 encoders on them both.

I have only just unloaded it from the truck, I have not yet had it powered up but it had been inspected and running before I bought it. I would like to change to a more modern system, I have already got a EMCO mill and EMCO lathe I have started to convert to ACORN as they came with no controls, I also have most of the hardware required for a CNC plasma cutter which would use Centroid as well. I figured to keep all the same controls across my machines to make it easier to run, there isn’t much info out there on the Heidenhain controllers and I have no one local that I can learn off so it is all forum help for me. Plus the price of a Heidenhain probe and tool height setter is going to pay a fair bunch of a conversion including both those items. Also the sale of all the TNC hardware will help too. It is in very good condition.

My research leads me to using an OAK controller on this machine, I have come up with the following solutions to the conversion requirements if you could please have a look and see if I am in the right direction.

1. I will need to remove the Heidenhain interface controls from the 611 and replace with a SIMODRIVE 611 HR universal controller 6SN1118-0NH01-0AA1, I am going to need 3 of these. From reading the Siemens functional manual on the 611 it appears I can wire the 1Vpp encoders to this control board and program a pass through for these signal which converts to TTL format to the OAK.

2. I “think” I can then control the 611 in velocity mode via analog signals +-10v

3. I have found an Aikron signal converter which can convert the scales and manual axis encoders to TTL to connect to the OAK via and expansion board https://www.aikrondro.com/product/signa ... a-and-ttl/

A few things I am unsure of, it appears this machine uses the scale feed back as the hard limits not proximity switches, I cant see any other way it would do it with the hardware fitted. Can I do this with the OAK?

The 611 controls I am looking at have Nset ( which I have deciphered to mean analog control) and Positioning mode. It appears it can do position via digital inputs, but I cannot work out how this configuration works, to many differing terminologies across all the languages and even manufacturers... it also has Positioning via Profibus DP. There are Ethercat to Profibus convertors which would allow use of a Hickory but I have no idea what can of worms that is. Which control mode do I use on the OAK for the best outcomes?

Further to this, how does the controller control the spindle? Is it the same analog format? As it is the same control board in the 611.
How would the manual axis integrate with the OAK? Centroid software? Can this be utilised or is it just a DRO style output.

There is probably more but this will get me started. Photos to come. Thanks Str8

Hello
I use oak with new Delta AsdA2 Motor


I provide professional retrofit solution to my customer and they have a plan for scale input with EXE601 converter to encoder expansion card although didn't order yet.
But for centroid oak+ encoder it's not a big deal.
Aamir

aamir wrote: ↑Sat Aug 24, 2024 12:16 pm scale input with EXE601 converter to encoder expansion card

I have looked at those and another variation that would suit made by Hiedenhain but they are ridiculously expensive. The Aikron ones are under $40USD each. There is also another convertor made by a DRO outfit in the US but I havent priced them yet. I have minimum 5 encoders to convert not including the 4 that will be done via the Siemens control interface.

Current control and encoder interface from the Heidenhain 426 to the Siemens 611 interface module. Pretty sure these wont work with the OAK.
This is the board I can use to replace the above cards.

Siemens 611 has analog input and can be used with Oak.
U can can find exe601 on ebay in very good cost.
U can also use exe934 3 axis and in good cost.
It would be great if u upload the complete pdf manual if u have .
DMU 50T is four axis or 5 axis ?
If 5 axis u need oak+ optic direct.

aamir wrote: ↑Sun Aug 25, 2024 9:19 am It would be great if u upload the complete pdf manual if u have

I have tried but it the file sizes are to large. I can dropbox link to the admin if they would like to upload the to their archive or what ever?

Thanks
I will send u my email through personal msg