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Messages - Fastest1

221
General Mach Discussion / Another newbe with a 3040Z CNC from China :(
« on: February 25, 2014, 07:53:11 AM »
As Zasto states, it could be an enable feature too or instead of the charge pump. Under outputs in the config menu of Mach you will see "enable" assign the pin 16, port 1 and see if it works.

The charge pump operates a little differently and is a safety feature.

222
General Mach Discussion / new mach 3 version
« on: February 25, 2014, 07:47:26 AM »
4?

223
G-Code, CAD, and CAM discussions / GCODE causes problem.
« on: February 25, 2014, 07:47:07 AM »
Just wacky enough to keep all of our machines running correctly.

224
Check or uncheck active low and see if the status changes when testing. Low is sinking the circuit to ground, High is sourcing the 5v. That is my understanding. I don't use auto set up.

On my EStop port 1 pin 10, switch is an NC, active low unchecked. It will have 5v present til the EStop is pressed. Then it will go low and trip Mach.

225
General Mach Discussion / LPT port "active low", "active high"???
« on: February 25, 2014, 07:32:12 AM »
The questions aren't dumb.

High (5v) low (0v). Active "high" is really "active low"'unchecked. You will measure a higher voltage (anything above 3-4volts) or close to 0 if low. These numbers aren't exact and it is really just an on or off signal. Setting up some forms of switches will require using resistors til you get these voltages close. Don't know why they call it active? Maybe because it will change status instead of being static?

Regarding the charge pump, it is a safety device. The controller is looking for the presence of a signal. Until this signal is seen no motion control will take place. IIRC it is a 25Khz signal not a voltage but I could be wrong there.

  Your equipment is pretty forgiving in relation to "active low" being checked or not. If it doesn't work one way, try checking or unchecking active low. No harm will be done if it is wrong. It won't work but no damage is done.

226
General Mach Discussion / Re: Another newbe with a 3040Z CNC from China :(
« on: February 24, 2014, 11:04:56 PM »
As a test I just did a few things.
 First I turned on my controller, steppers have some resistance but easily turned by hand.

 I then opened Mach, no change in steppers until I hit the reset (which was of course flashing since Mach was just opened). The steppers then locked.

Then I went in to configuration and unchecked my charge pump (in my case pin 16 port 1), apply, ok and the steppers went limp again. Of course I rechecked it as this was a test. I mistook 17 for 16 when I spoke before, though both are potential outputs.

  Judging from your chart I suspect pin 16, active low unchecked (to keep the pin high I think) this voltage being high 3.35 or above has your steppers locked.

227
General Mach Discussion / X Limit switch challenges
« on: February 24, 2014, 09:04:08 PM »
Let's not suspect noise just yet. Leave the shield unconnected at both ends.

    Didn't you say you can't get your EStop to stop flashing? Let's put a jumper from pin 10 on the BOB to the nearest ground on that side of the board. Try active low checked and unchecked if need be. Disable all limit and home switches til step 1 is complete.

228
General Mach Discussion / home plus and minus = limit switches
« on: February 24, 2014, 08:58:12 PM »
There probably is but it would involve a lot of mathematics most likely.

It is rpm oriented, optimizing your stepper electronically and mechanically to eliminate loss of steps.

Test it like you have it. If it starts cutting odd or missing steps, hearing stalling on quick directional changes or the like it will require a change. Or you might want better resolution? 1 unit \ 400 = .0025 per step. Those are big steps in the CNC world. If you were at 10x microstepping those steps would be .0005 per step. Quite a bit of difference in resolution.

229
General Mach Discussion / Another newbe with a 3040Z CNC from China :(
« on: February 24, 2014, 08:50:38 PM »
This is just a stab in the dark (I am mobile). How is pin 17 configured? Try enabling it. It is a charge pump. Some controller will not perform anything without the presence of that signal. It is worth a try. It won't hurt anything if it isn't set up that way. I just won't work, kind of like now.

230
General Mach Discussion / Re: I feel somewhat stupid asking but.......
« on: February 24, 2014, 06:09:25 PM »
No. Those are your machine coordinates. There will also be work coordinates set up within the machines boundaries/limits