Slotted optointerruptor

[lucf]

Hi to everyone,

I am brand new on this site and I need help !

I want to replace the micro switches on my machine (Router) by "Slotted optinterruptor". Is there somebody who could suggest me a trademark and model No ?
The reason why I want to do that is the precision.
They could bee located in a dust free location.


Thank you.

Lucf

[bharbour]

Hi Lucf,
Are you looking for a complete packaged limit switch that uses a slotted opto-switch or are you just looking for the slotted opto-switch?

Also, are you going to have more than one of these wired together on an axis (like a pair of limit switches)? The reason I am asking is that it makes a difference in the usable choices.

Regards,
BobH

[Al_The_Man]

The H22A1 is a cheap solution ($2.00) http://parts.digikey.ca/1/1/8008-swi...1ma-h22a1.html ,
You need to add a couple of resistors, depending on the voltage you are using.
If you go with a prepackaged style, they can get pretty expensive, unless you go the ebay route.
It also depends on the size of the envelope you want to use, the one's mentioned are fairly small.
Al.

[lucf]

Hi,

Thank you everyone for your awnsers !
I am brand new on this forum and hope I reply correctly.
As you can see I don't write english very well but I hope you will understand.

About mechanic, I don't hae any problem but I know absolutly nothin in electronic. So, I want to install optointerruptors using the easiest and
cheapest way.

Actually, I use 6 standard micro switches +5V. Two on each axis wire together.

About optointerruptors, there is enough room on the machine to install one
at each end of the three axis or to install one one moving whith axe an install
a 'Flag" at both ends.

As I said before, I know nothing about electronic but I am able to install and wire them if somebody is able to supply me a simple wiring diagram and
parts numbers, even if I must make small circuit boards.
Thank you for the part number and supplyer name you sent to me but "A couple of resistors" sounds like chineese to me.

I prefer to buy separate parts, it would be an experience !
But I need help "Starting from scratch".


Thank you very much.


lucf

[Al_The_Man]

Like I mentioned, the values depend on what voltage you are using.
That is if you intend using the H22A1 or something like it.
Al.

[lucf]

Originally Posted by Al_The_Man Like I mentioned, the values depend on what voltage you are using. That is if you intend using the H22A1 or something like it. Al.

Hi AL,

This morning, I posted as much informations as I could. As I am new in this forum, may be I dit not posted it correctly. (I use +5V)

Thanks

Lucf

[Al_The_Man]

I Missed the bit about the +5v.
Here is the hook up for the H22A1, the H21A1 has two mounting screw holes either side.
Also a PDF on sink source.
Al.

[lucf]

Originally Posted by Al_The_Man I Missed the bit about the +5v. Here is the hook up for the H22A1, the H21A1 has two mounting screw holes either side. Also a PDF on sink source. Al.

Hi Al,

Thank you for the kwick awnser.
I will try to understand the attached document !
If Iwell understand, I would be able to wire the H22A1 in serie almost like
the micro switches !

Thanks again.

Luc

[lucf]

Hi Bharbour,

Thank you for your awnser., but as I am not familiar whith this forum, I do not know exactly how to awser to one person. Sorry!

As I sai to Al the Man, wo replyed proptly, I know nothing about electronic.

To awnser your question, I would prefer to replace my micro switches by opto coupler, using the same kind of wiring (Pair). I wish to find Model No and TradeMark and an easy wiring diagram. Al sent me some informations I will try to understand but
I would appreciate if you ha any information.


Thank you very much.


LucF

[Al_The_Man]

You will have at least 3 conductors to each of the switches if you wire the outputs up in series, there is no base control of the output transistors, but as they appear to posses diac characteristics you should be OK for a limited number.
With commercial packages, you may only be able to parallel the outputs with an open collector output.
If so, you would need to obtain a type called 'Operate on Dark' rather than 'Operate on Light'.
If you are green at electronics, I would suggest you pick up a couple of the H22A1's and experiment.
This is the best way to learn what is going on.
Al.

[martinw]

Originally Posted by lucf Hi to everyone, I am brand new on this site and I need help ! I want to replace the micro switches on my machine (Router) by "Slotted optinterruptor". Is there somebody who could suggest me a trademark and model No ? The reason why I want to do that is the precision. They could bee located in a dust free location. Thank you. Lucf

Dear Lucf,

I am a late arrival at the party, and apologise.

Could you tell us what kind of precision you want from your switches?

Best wishes,

Martin

[bharbour]

Hi Lucf,
Al's solution should work, but I think that you can get very good precision with a good quality microswitch and a good rigid mounting for the switch. Optoswitches will need to be protected from oil, dust chips and mechanical damage and I don't think will give you a lot higher precison. I think that by the time you have a housing on the optoswitch to protect it, you will have spent as much as you would have for a good microswitch. I have seen mechanical switches used in very high precision applications.

Good Luck,
BobH