Hello Guest it is March 28, 2024, 10:39:42 PM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - uzair

Pages: 1
1
General Mach Discussion / Re: Limit switches issue
« on: April 26, 2021, 02:37:47 AM »
Hi,
you are confusing limit and home switching.

When Mach is in 'Homing' mode it will travel until the home switch activates and then backup until it deactivates.
When it is not in Homing mode then the switch is treated as a limit and Mach Estops immediately, no if's,
no but's, it just stops....and that is what its supposed to do.

I have always recommended having separate home and limits switches, so that would be six limit switches, two for
each axis, and three home switches, for a total of nine switches. Most people think that's too much bother....but then you
have this issue. You decide.

Craig

oke got it. but ive been trying,its only setting home switching. how do i set up limits only so it can move back. ive tried youtube but all the videos are irrelevent. if you could show any SS from where i can see.thankyou 

2
General Mach Discussion / Limit switches issue
« on: April 24, 2021, 05:18:52 PM »
hello
at start  when i first tested the limit switch. as soon as it got triggered the cnc would move back untill the limit switch got turned off. but now as soon as the limit switch is pressed the cnc freezes i have to override the limit switch and then move the cnc back.
is there something wrong I'm doing because i didn't disturb the setting. i don't know what happened.

i want the cnc to move back until limit switch is no longer triggered. me  guide me??

my limits have to inputs. one from the

3
General Mach Discussion / Re: spindle speed control
« on: April 23, 2021, 11:06:27 AM »
A vfd would only be of use for a 3 phase mains voltage spindle. As yours is a 24dc spindle, the simplest way would be to connect it to a 24v dc power supply, and switch it using a relay from your controller. It should then run at max speed.
If you want more sophistication you could look for a variable voltage supply from, say, eBay so you could control the speed manually. You will not be able to use the 0-10v analog output from the controller, as it is not capable of supplying the current that the spindle would need.
yess i have connected the spindle through relay so i can switch it ON and off. thankyou soo much.
so theres no more speed to it.
and can i connect the 12 dc pump by connecting a 12v  relay  along side the spindle so they both turn ON. it will work right??.

4
General Mach Discussion / Re: spindle speed control
« on: April 23, 2021, 09:43:41 AM »
We still don't know what spindle you have, is it DC or BLDC or an asynchronous motor or what?
You need to give us some details.
Craig
the spindle i bought is a 24V dc. and i do not have a VFD.


the thing is its very hard to get parts from here i have to order them online and i only have 3-5 weeks left to submit my project. plus the orignal parts are way to expensive here.  if i order a vfd it would increase my project cost.



all i need is to get spindle to its max speed s i can save much time. with current speed my axis motor are travelling at 80mm/minute because the cutting speed is slow. consider me a very great noob.  just looking for a hack TBH.

5
General Mach Discussion / 12 V water pump connection
« on: April 22, 2021, 06:20:31 AM »
hello there, i am usimg mach 3 controller. and i need to connect a 12v dc pump with mach3 . but i am unable to find the right pins. as there are no pins  or may be im unaware of. the water pump only has black and red wire. where should i connect it and with which pin should i connect it . so i can turn it on with M8 command as well.
im adding the picture of my mach3 below.
if i need to connect a relay or something and if it can be done without it ill be glad for your help. please do respond.

proper wiring defined would a great thankyou 

6
General Mach Discussion / Re: spindle speed control
« on: April 22, 2021, 06:06:11 AM »
in order to control the speed of a spindle with a PWM signal you need a controller that will accept a PWM signal,
or effectively, a 0-10V siganl and control the motor speed. Do you have such a device? If MACH3 doesnt count then no i  do not have any such device .

Second question is 'do you need it?'. With the current speed i had to lower my acceleration and velocity so low so that it doesnt break the marble. it took almost 2 hours to complete a 1500 line gcode. where as it takes only 10 minutes on a wooden peice.

Most of the time my mini-mill sits at 24000rpm and stays there all day. I can control
the speed both manually and programmatically but I seldom need to. I imagine you'll be running your diamond tools at a constant
Yes i will be running it at a constant speed but i want it to be the max speed so i can move the machine a little faster.

so is there any way i can make it work at its max speed without PWM supply???? like with the 24 supply i have provided it.

7
General Mach Discussion / spindle speed control
« on: April 21, 2021, 01:33:24 PM »
hello. i am making a 3 axis-marble carving and cutting CNC machine.
i have connected my spindle with a 24v relay. the relay is connected with 12-24v supply and the last two terminals of relay. with this i am unable to control the speed of the spindle and its running on a fixed speed. i don't get how to connect 0-10v terminal with relay. can somebody suggest how may i connect it to control the speed,
not to mention. i have selected the PWM selection from the software. but still not working. i have attached the pictures, i hope they are visible.

and how do i connect 12v water pump with mach controller. a wiring picture would be helpfull please.
thankyou in advance


if pictures are not available then please guide me how upload them

[/img]

Pages: 1