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Re: encoder suitability
Posted: Fri Oct 20, 2017 9:10 am
by dandonegan
I have installed many of the Automation Direct encoders. I have never had a single problem with one and you know what you're getting. Also come with phenomenally nice cables at a reasonable price.
dan
Re: encoder suitability
Posted: Fri Oct 20, 2017 12:03 pm
by martyscncgarage
dandonegan wrote: ↑Fri Oct 20, 2017 9:10 am
I have installed many of the Automation Direct encoders. I have never had a single problem with one and you know what you're getting. Also come with phenomenally nice cables at a reasonable price.
dan
Right on Dan!
Re: encoder suitability
Posted: Fri Oct 20, 2017 12:40 pm
by automan1223
have any of you folks seen these encoders by this company. I like the large bore spindle encoders but am confused with all the details, signals etc.
http://www.roundssencoder.com/pro_cnc.asp
thoughts ? other than trying to order from China....might be a while.
Re: encoder suitability
Posted: Fri Oct 20, 2017 2:22 pm
by martyscncgarage
automan1223 wrote: ↑Fri Oct 20, 2017 12:40 pm
have any of you folks seen these encoders by this company. I like the large bore spindle encoders but am confused with all the details, signals etc.
http://www.roundssencoder.com/pro_cnc.asp
thoughts ? other than trying to order from China....might be a while.
I think on something specialized like that, you should call them. You want a 5VDC, Differential, Line Driver output encoder. 2000 line count per rev minimum (8000 counts per rev in quadrature)
You can just cut and pasted Centroid's Encoder guidelines and email it to them along with the dimensions you require.
Its what I would do. I don't think they are gonna be cheap, but it looks like they can definitely provide them. But they have to provide you with the correct part number for their encoder and quote you.
Re: encoder suitability
Posted: Fri Oct 20, 2017 7:11 pm
by dandonegan
I think it would be more cost-effective to install a timing pulley on your large spindle. Mount your encoder on the bracket and install the same diameter pully as encoder shaft size connected with a small timing belt.
Look up posts about lathe encoders.
Dan
Re: encoder suitability
Posted: Mon Oct 23, 2017 11:51 am
by francoCNC
Hi Guys - this is an awesome thread! Thank you for providing all of this information. I'm seeing a few important points:
1. Only use Line Driver Output Model encoders with eight wires ( A /A B /B Z /Z +V 0V)
2. Use 2000 line encoders (8000 counts per revolution)
3. Avoid buying junk
Did I miss anything?
Also - it seems that connecting the encoder to the Acorn board is the easy part. Does anyone have any thoughts about physically mounting the encoders? Perhaps it would be good to start a few new threads dedicated to mounting encoders on specific machine types? What do you think?
-Franco
Re: encoder suitability
Posted: Mon Oct 23, 2017 12:13 pm
by martyscncgarage
francoCNC wrote: ↑Mon Oct 23, 2017 11:51 am
Hi Guys - this is an awesome thread! Thank you for providing all of this information. I'm seeing a few important points:
1. Only use Line Driver Output Model encoders with eight wires ( A /A B /B Z /Z +V 0V)
2. Use 2000 line encoders (8000 counts per revolution)
3. Avoid buying junk
Did I miss anything?
Also - it seems that connecting the encoder to the Acorn board is the easy part. Does anyone have any thoughts about physically mounting the encoders? Perhaps it would be good to start a few new threads dedicated to mounting encoders on specific machine types? What do you think?
-Franco
Hi Franco,
You covered it pretty well.
As for mounting, unless you are lucky enough to find a machine with an encoder already mounted and timed 1:1 with the spindle and just have to update it (as in the case of my Emcoturn 120 lathe) I think each application will be different. Knee mills seem difficult to fit an encoder to the spindle.
As long as you use timing pulleys and 1:1 and just find a way to mount it you should be fine. Your idea of maybe a thread with pictures might be a good one to show ideas to others.
What's your first macine going to be? Start a thread with it!
Re: encoder suitability
Posted: Mon Oct 23, 2017 1:28 pm
by DICKEYBIRD
francoCNC wrote: ↑Mon Oct 23, 2017 11:51 am
Does anyone have any thoughts about physically mounting the encoders? Perhaps it would be good to start a few new threads dedicated to mounting encoders on specific machine types?
Here's how I put a Heidenhain on an ORAC:
viewtopic.php?f=60&t=1045
Re: encoder suitability
Posted: Tue Oct 24, 2017 8:02 pm
by francoCNC
DICKEYBIRD - Nice job on the ORAC!
martyscncgarage - What is the proper type of cable to use when connecting encoders and where is the best place to buy it?
Thanks,
-Franco
Re: encoder suitability
Posted: Tue Oct 24, 2017 8:20 pm
by DICKEYBIRD
Don't mean to butt in but the best place is right here at good ol' Centroid. If memory serves it's a buck and a quarter a foot and you KNOW it's the right stuff!
...and thanks for the compliment.