Has anyone added switches to a YooCNC 3040T control box?

[DMcKee]

Wonderful! Glad to hear things went well.

[Glenncou]

Thanks DMcKee for this thread. I have the same machine and have been able to connect limit switches to those pins I also found the oval shaped solder pads at the top right of the board above the circle you marked around the spot for the 25 pin header can be used for a z probe connection as it connects via a resistor and opto coupler to pin 15 on the parallel port.

[slomas]

DMcKee do you have pictures of you Mach3 settings for the motor tuning? I been having problems with repeatability... Thank you in advance.

[DMcKee]

Slomas,
Sorry I was on vacation. Here are the XYZ images. The velocity for X and Y is entered as 2000 but changes to 1999.8 for some reason. For Z the velocity is 700 but changes to 700.2
IMPORTANT! Do not forget to "SAVE AXIS SETTINGS" for EACH axis; otherwise you'll loose the changes you've made.
Best of luck.

[cimitoka]

CNC 3040T Tonsen
I have the same machine but the control box is different...
how can I connect here!!! limit switches?? is a 4-axis Tonsen
if anyone can help me I would be very grateful thanks.

[cimitoka]

No one man ....

[ken2010]

You're right - doesn't look like anyone has experience with your board. I sure don't know anything about that one. Good luck!!!

Ken H>

[cimitoka]

T

[cimitoka]

thanks for the reply man

[john-100]

Hi cimitoka

it looks like your the first with that breakout board !

looking at your photo it looks like its possible
but more detailed photos of both sides of the board will be required to see the PCB tracks
and workout the connections to 5 opto isolators you need to add to safely connect switches to your printer port



John

[cimitoka]

tomorrow I can get more details and more photos so maybe you can see better..!!

[john-100]

Hi cimitoka

another diagram of what I'd expect the unused input connections to be



if you decided to connect the limit switches directly to the PC printer port without the opto isolators

the input connections shown in red are the direct connection between the printer port pins
and the collector terminal of the opto isolator when its fitted

I'd fit a 6 X 4k7 SIL resistor array to help pull up the inputs when the limit switches are open circuit
you could wire six 4K7 resistors together to make an array but a resistor array like this is easier :-

10 x 6x4.7k? Ohm Widerstandsnetzwerk resistor array networ SIP-7 10pcs | eBay

you will need to find a terminal connected to the printer port ground to use as the common for your limit switches

with detailed pictures of the printed circuit I'l be able to correct any errors and add more details as required


John

PS

found this post with a circuit for your board :-

Tonsen 4 Axis Controller/Bob

my corrected version with notes of things I'd still need to check

[cimitoka]

[cimitoka]

I pulled out the card... and this is are the photo...

[john-100]

Hi cimitoka

I've added the E stop connector to the circuit diagram to match your PCB board
and added some lables to the picture of the top of the PCB





are you going to add the limit switches without the opto-isolators
like they connected the E stop switch ?

If you are, just wire across the opto isolator pins 2 & 4

so the limit switches can be connected to the 10 way connector

the limit switch needs ground the printer port pin you wish to use (pin 11 , 12 13 or 15 )

John

[cimitoka]

Hi John

I'll try to do
thanks for all the answers

[john-100]

Hi Cimitoka

are you going to fit opto isolators ?
and do you have a desoldering tool like this ?



I would use opto-isolator

but if you go with the opto isolators bypassed and you don't have a desolder tool

you can connect an individual 4K7 pull up resistor between the +5V terminal and
each additional input terminal your using
instead of using a 4K7 resistor array






John

[cimitoka]

Hi John I do not think I can do...

can you do it? I can send to you?
of course all expenses charged to me

[john-100]

Hi Cimitoka

what part of the world do you live in? (pm me)

insured postal charges between the UK and the US can be OTT
the other issues I've had on occasions is with UK customs *

depending on the postage costs etc.
I'll either add the parts to your board
or find / make an easy cable adaptor to connect your existing breakout board to
a simple adaptor to connect the limit switches to the printer port

(a simple adaptor cable using a ribbon cable with an IDC 25 pin plug and two IDC 25 way sockets doesn’t need soldering !)


how many inputs do you need to use for the limit switches ?


for now I'll have a think the about various options

John


*
in the past UK customs wanted to charge me import duty and VAT(tax) on a power supply ,
replaced under warranty. (it had been sent from Canada via USA)

as an example tax and postage doubles the cost of the Gecko G540 in the UK !







John

[john-100]

Hi Cimitoka

this is what I'm thinking



it has the advantage that you don't have to post the original yoocnc b.o.b so you can all ways use your machine


its just a matter of deciding how many inputs and what type of connectors to use for the limit switches

the adaptor PCB can be either be a one off board I can make or a ready made breakout board

if you have the space

the yoocnc board and the limit switch adaptor can be fitted inside of the control box

John