Encoder Basics

All things related to Centroid Oak, Allin1DC, MPU11 and Legacy products

Moderator: cnckeith

TRM
Posts: 218
Joined: Fri Jul 27, 2018 5:42 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC11: No
CPU10 or CPU7: No

Re: Encoder Basics

Post by TRM »

Can I use this encoder that is already mounted and belted 1:1 on my lathe? The connector is 18mm x 1.0 thread 9 pin.
If someone recognizes the connector please let me know what type it is so I can buy one.
I found this plug that looks like it may work. https://www.binder-usa.com/products/pow ... %2000%2009
Attachments
IMG_6434.jpg
IMG_6433.jpg
IMG_6432.jpg
IMG_6431.jpg


Gordon1234
Posts: 45
Joined: Mon May 18, 2020 2:27 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No

Re: Encoder Basics

Post by Gordon1234 »

Hello from France !

I have a EQN 1325 by HEIDENHAIN encoder (incremental signal 1Vpp, 2048 lines 8192 positions), not TTL. Is it ok for centroid acorn ? Thanks a lot ;)

Eric


tblough
Posts: 3323
Joined: Tue Mar 22, 2016 10:03 am
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: Yes
CNC Control System Serial Number: 100505
100327
102696
103432
7804732B977B-0624192192
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
Location: Boston, MA
Contact:

Re: Encoder Basics

Post by tblough »

Hi Eric. Post the manual for the encoder and I'll take a look at it to see if it will work.
Cheers,

Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.


cncsnw
Posts: 4090
Joined: Wed Mar 24, 2010 5:48 pm

Re: Encoder Basics

Post by cncsnw »

You would need to purchase an IBV box from Heidenhain (e.g. IBV100, IBV600, etc.) to convert the 1Vpp signals into TTL differential signals.

It would almost certainly be less expensive to just replace the encoder with one that has a 5V differential output.


Gordon1234
Posts: 45
Joined: Mon May 18, 2020 2:27 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No

Re: Encoder Basics

Post by Gordon1234 »

Hello ! thanks for your answers !

@ tblough : Here is a link with manual : https://www.atechauthority.com/products.asp?id=29

@cncsnw : Ok thanks I will check prices, maybe good deal ? I pay 30€ heidenhain encoder. IBV 610 will be good for this ?


tblough
Posts: 3323
Joined: Tue Mar 22, 2016 10:03 am
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: Yes
CNC Control System Serial Number: 100505
100327
102696
103432
7804732B977B-0624192192
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
Location: Boston, MA
Contact:

Re: Encoder Basics

Post by tblough »

Gordon,

From the webpage:

Code: Select all

Incremental signals - 1 VPP
Line count - 512 or 2048
Data interface - EnDat
Resolvable revolutions - 4096 (12bits)
Absolute position values - 8192 (13 bits)
Power supply - 5V
Capture.PNG
You'll need to verify that is the connector you have, but the wire colors should be correct. As CNCSNW already pointed out, that is a 1V peak to peak analog encoder. You'll need a converter to change that into RS422 differential quadrature signals that Centroid requires. Used ones seem to be around $300 here in the States, so you're better off ditching the Heidenhain encoder.

By the time you purchase the interface and make the adapter calbles, you'd have more money into it than starting with the correct Centroid encoder.
Cheers,

Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.


Gordon1234
Posts: 45
Joined: Mon May 18, 2020 2:27 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No

Re: Encoder Basics

Post by Gordon1234 »

Thanks a lot. I found one at 85€ in France (used), i will check price for cables.


Abdullah Butt
Posts: 27
Joined: Tue Jul 10, 2018 7:37 am
Acorn CNC Controller: No
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC11: No
CPU10 or CPU7: No

Re: Encoder Basics

Post by Abdullah Butt »

Here a question about M400 system using SD3 drive..
Can we use 2500 ppr (10000) encoder for a AC servo..
Is it reliable for AC servo motor or must need 2048(8192). ?


gttool
Posts: 30
Joined: Wed Oct 28, 2020 6:17 am
Acorn CNC Controller: No
Allin1DC CNC Controller: No
Oak CNC controller: Yes
CNC Control System Serial Number: A900966
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
Location: Sydney Australia

Re: Encoder Basics

Post by gttool »

Oak related
I have not been able to find any reference to using Absolute encoders in the forums .
looking at buying a pair of Delta A2 drives and servos for a lathe they are available with absolute encoders ?
Just waiting on a price back for them
Is there any plc programming changes to be made to use them ?
Thanks


eng199
Posts: 407
Joined: Fri Jan 10, 2014 11:29 am
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: Yes
CNC Control System Serial Number: none
DC3IOB: Yes
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: Yes
Location: Howard, PA

Re: Encoder Basics

Post by eng199 »

Abdullah Butt wrote: Tue Aug 18, 2020 11:55 am Here a question about M400 system using SD3 drive..
Can we use 2500 ppr (10000) encoder for a AC servo..
Is it reliable for AC servo motor or must need 2048(8192). ?
SD1 and SD3 need a power of 2 count encoder (2048 or 4096). Speed limit may be an issue with faster motors, which is the reason 4096 was normally only on 3 and 4kW motors.


Post Reply