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Author Topic: Tool Offset Macro...  (Read 24849 times)

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Offline rcaffin

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Re: Tool Offset Macro...
« Reply #120 on: August 20, 2016, 03:46:53 AM »
They work well, but you need to mount them right at the encoder for best effect.
Single-ended encoder signals in - you may need pull-up resistors there.
Differential output: you will need screened 8-core cable from the encoder to the driver. 2 wires for power and ground, 2 wires for A, 2 for B and 2 for I.
Put a 0.1 uF cap across the supply at the chip.

Cheers
Roger

Offline Davek0974

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Re: Tool Offset Macro...
« Reply #121 on: August 20, 2016, 04:02:17 AM »
Thanks,

just found this from Hood in the past on his Beaver Mill, looks like it really is that simple.

https://www.machsupport.com/forum/index.php?action=dlattach;topic=21149.0;attach=29905;image

The encoder only has 1m lead on it so that can be shortened a bit, got a chip on its way, already got vero board and plenty of caps etc, sounds like a project coming on :)
« Last Edit: August 20, 2016, 04:08:24 AM by Davek0974 »
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives

Offline rcaffin

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Re: Tool Offset Macro...
« Reply #122 on: August 20, 2016, 04:09:21 AM »
You will also find little screw connectors at RSComp, as shown here. They are really very nice - beats the hell out of soldering the wires to pads on the board. And you can stick the voltmeter probe on the recessed screw heads as well.
The central PCB is actually 3 encoders' worth of optical isolation. It may be overkill - or it may not.

Cheers
Roger

Offline Hood

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Re: Tool Offset Macro...
« Reply #123 on: August 20, 2016, 04:56:18 AM »
Personally I think I would just solder direct to the line driver for this application as it will be right at the encoder and can probably be housed inside or even taped direct to the body of the encoder.
Hood

Offline rcaffin

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Re: Tool Offset Macro...
« Reply #124 on: August 20, 2016, 05:16:21 AM »
Well, yes, that is another way of doing it.
My concern is that every time I do something like that, the chip dies and it is then a huge hassle replacing it. Murphy!
Cheers
Roger

Offline Hood

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Re: Tool Offset Macro...
« Reply #125 on: August 20, 2016, 05:19:00 AM »
One word,
Socket :)

Offline rcaffin

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Re: Tool Offset Macro...
« Reply #126 on: August 20, 2016, 05:26:26 AM »
Oh, for sure. Until I get into the surface-mount devices. Some of the stuff seems to be only available these days as SMDs.
Cheers
Roger

Offline Hood

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Re: Tool Offset Macro...
« Reply #127 on: August 20, 2016, 05:29:09 AM »
Yes, smd is the future or suppose really the present, sadly my eyes are not the past :D

Here is a wee board I made up using the sockets, it was before the CSMIO days so had to convert the Step/Dir to differential. I got a few boards printed, was needing it for use with the Scorpion board I was testing at the time, big brother of the ESS I suppose.

Hood

Offline rcaffin

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Re: Tool Offset Macro...
« Reply #128 on: August 20, 2016, 06:01:53 AM »
I like.
Getting PCBs made locally is a bit more $$. So I engrave my own using double-sided laminate. Earth on top side, tracks the other.
I do it on a vacuum table. Not as smooth-looking as yours.

Cheers
Roger

Offline Hood

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Re: Tool Offset Macro...
« Reply #129 on: August 20, 2016, 06:46:50 AM »
Yes, works well, did that for a prototype I was designing for a customer.
Hood