Messages

1

General Mach Discussion / Pulling Pins High

« on: October 26, 2010, 08:35:27 AM »

Can someone explain to me why you would pull a pin high to +5v? 

The reason I ask:

I'm trying to setup an auto zero for my Z-axis.  I set the input to active low but when I run any script Mach never gets a signal to ground to trip the script.  I'm going directly to the port, no BOB.

What's going on here?

I've seen a few setup this way but I don't know why.

2

General Mach Discussion / Re: Output voltage problem?

« on: October 19, 2010, 02:16:51 PM »

I changed the output to active low and add a 470k R (1/4 Watt) to the 5v power supply. It dropped the voltage to about 3.46v from 5.1v. It's didn't turn the relay on.  I also tried a 470 R (1/4 Watt) and had no voltage change, I didn't hook this up the the pinout . 

The SSR is rated for typical input current of 3-15v 15mA @ nominal voltage.  http://www.mpja.com/download/16596rl.pdf

E=IR is not a formula that I am very good with. I'm afraid to smoke the port?

The power supply is a standard PC ATX supply is that is a clue?

Not sure what's happening.

3

General Mach Discussion / Re: Output voltage problem?

« on: October 18, 2010, 01:40:50 PM »

Interesting?  I'm going to take a closer at this.  Keep the relay hot and then close it to ground. Thanks.

4

General Mach Discussion / Re: Output voltage problem?

« on: October 15, 2010, 06:09:07 PM »

This is the relay I'm using.  CRYDOM EZ240D18 I bought it from MPJA.  Switches 240 @ 18A  using 3-5v.

Not sure what to do I guess  need to read up on Opto-couplers and breakout boards.  I certainly don't want to lose another computer.  The setup time is too much.

5

General Mach Discussion / Re: Output voltage problem?

« on: October 13, 2010, 12:35:52 PM »

Maybe I need a relay to turn on my relay?!?!

6

General Mach Discussion / Output voltage problem?

« on: October 13, 2010, 12:30:19 PM »

I'm out on pin one for my spindle relay (3v-15v input).  When toggled on I show 4.34v at pin one. When I connect the relay it drops to 1.43v and wont turn the relay on. I know the relay works if I jump it to 5v it turns on.  Tried it on pin 14 and 16 also, same result.  No luck.  It used to work fine.  Just became a problem in setting up a new PC.  I'm lost for words I've been banging at this for at least 3 hrs. 

7

General Mach Discussion / Re: Z axis only moves in one direction when jogging?

« on: October 13, 2010, 12:20:35 PM »

Turned out to be a short in the wiring harness.  What a pain.

8

General Mach Discussion / Re: Z axis only moves in one direction when jogging?

« on: October 08, 2010, 11:31:34 AM »

I'm all good in that respect. No dupe's.

9

General Mach Discussion / Z axis only moves in one direction when jogging?

« on: October 08, 2010, 09:19:26 AM »

I installed Mach 3 v2.63 on my machine after my PC crashed and wouldn't start.  I ran this machine successfully for almost two years.  In setting up my pinout in which Z pins out port 1 on pin 6 and 7 stp and dir respectively.  I only get clockwise rotation.

I swapped out the stepper (IMS Mdrive 23) and that had no result.  Swapped keyboard to rule that out. Pinned out onto the X axis and that didn't help.  Finally I decide to change the direction pin to 8 instead of 7 because I thought it might be something with the port.  That produced no result.

I figured before I went any further I would throw it out there.

Thanks.