Hello Guest it is March 28, 2024, 09:43:13 AM

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 - gyrojeremy

Pages: 1 2 3 4
1
Yes I have ordered the clearpath servos. They are on their way. I have more plans for CNC builds in the future so I'm might look into Delta servos for the next one.
Thanks for the insight on what the output is used for. I'll see what else I can come up with for torch zeroing.
Cheers,
J

2
Mach4 General Discussion / Re: Probe calibration error
« on: March 04, 2023, 12:46:39 AM »
Ok, I know this is an old topic but the issue hasn't been resolved for me, at least not all of it.

Thank you for the suggestions that have been made.
 
I ended up buying a new dedicated computer for this machine and that fixed all the weird glitches the mill would have from time to time and the Single surface, 2 surface centering (inside), Corners (inside) and Bore/Boss (bore) probe routines work flawlessly. All the others... not so much.

The problem seems to lie in the routines that require more than 1 axis movement to get into position for probing ie; X, -Z, -X to first probe then X, Z, -X, -Z, X to second probe.

I tried the uncheck box and that did at least get me through half the 2 Surface Centering (outside) probe routine but with velocity FIFO buffer errors as the axis movement direction changes. Clearing these FIFO errors would allow the routine to continue to probe the first surface (so from center to first probe and back to center would give me a total of 8 velocity FIFO errors to clear). It would then pause at the center (very briefly) on the way to the next probe position but fall short of the intended destination, moves -Z expecting to move down then back in to probe but obviously gets a false probe hit as the probe touches the top of the thing it's meant to be going down beside.
Wow, try and piece that together in your head. A video would be easier to see but I'm to lazy for that.

And before anyone asks, The width and Approach and starting position are correct.

I tried changing the buffer size and plugin frequency to alleviate the FIFO errors but this didn't help.

3
Hi All,

I'm building a CNC plasma, I plan on using the MB3 and ESS combo with Clearpath SDSK Servos run by Mach 4.

Before a cut is made the torch height needs to zero on the surface of the material to be cut first then raise to say 3mm above the surface and begin cutting.

So as the title suggests I'm wondering if the Clearpath HLFB on the Z axis of the plasma cutter can be used to trigger a condition in Mach 4 (Zero the torch height) when the plasma torch touches the plate before cutting.

From what I've seen most people use a micro switch or continuity test to set zero pos for the torch but this adds complication and potential failure points to the construction.

I'm hoping with a bit of code and the right settings in the Clearpath UI this could be achieved by having Mach 4 monitor the amp draw from the servo HLFB. During the steps outlined above when the torch touches the material, the amp draw goes above a set point, Mach 4 will then zero the Z height and proceed with the next step.

Has anyone done anything like this using the HLFB?

Cheers,
J


4
Mach4 General Discussion / Re: Glitch on X movements
« on: January 20, 2022, 02:26:31 PM »
I have to be honest, most electronics, circuitry is well beyond my current level. I dabble in it when the project requires it but it's all very much trial and error and smoke.

My mill is working ok as is but I'm not sure I'll ever be content with it. There is always things I'd like to improve on. The spindle is one of them. It's only a matter of time before the retro fit bearings give up and I wont be replacing them, it will be a whole new spindle design. I'd love to machine up a new spindle cartridge but I'm afraid my little lathe is just not up to the task.
Spindle motor and drive are on that list as well so will need the ESS third port at that point for the encoder on the spindle. Rigid tapping would be a nice option to have.

5
Mach4 General Discussion / Re: Glitch on X movements
« on: January 20, 2022, 03:35:39 AM »
They are indeed wired in series. Had no idea what I was doing when I wired all this up and was just following what other people had done. And I'm pretty sure there is no software to support the HLFB anyway. It's currently just an input that does nothing. Once again, at the time had no idea what it was for or meant to do.

I'm running the ESS with a C25 BoB, 5v. I think it would be beneficial to run a 12v or 24v system to mitigate signal interference. I think the clearpath servos support that so would be just a case of upgrading the BoB. I've attached the pin layout. I do have 2 spare inputs which I'll use to change HLFB.

Would you like to share a picture of your BoB? Do you sell them?

Was just online looking at the C52 for the third port expansion. Would cost to get it from the states and add a whole other level of ugly to the control panel. The MB3 looks like a clean option.

6
Mach4 General Discussion / Re: Glitch on X movements
« on: January 20, 2022, 01:33:16 AM »
I've been reading stuff about the HLFB on this thread- https://www.machsupport.com/forum/index.php?topic=37464.20
I think I have mine wired in series to one input. Will definitely have to take a look at this.

7
Mach4 General Discussion / Re: Glitch on X movements
« on: January 18, 2022, 04:56:19 PM »
Checked over the numbers this morning and you were right Craig. Turns out I had an extra zero on both max velocity and acceleration on the X axis. giving them a speed of 50000 and acceleration of 10000. Run the same drill hole program and it run sweet.

8
Mach4 General Discussion / Re: Glitch on X movements
« on: January 16, 2022, 07:08:35 PM »
Lol. mm/minute not mm/s

9
Mach4 General Discussion / Re: Glitch on X movements
« on: January 16, 2022, 04:17:58 PM »
Ok I'm winging this from memory and I'll double check the numbers next chance I have.
I'm using clearpath servos. And they are set up via the clearpath software Auto tune. From memory I think I did de-rate them to about 75% max torque as part of that setup. These servos have a peak torque rating of about 7.75Nm. Can move axis at max 7000mm/s with acceleration at 10000 something's.
Like you say, it's scarry and clunky.

In Mach I limited the max travel speed to 5000mm/s (will have to check on that, may even be 3000mm/s) and acceleration to 1000 something's.
Basically I set it up so I could visibly see the deceleration and acceleration when moving back and forth at max speed. This was also well below the clunkiness of fast acceleration. All Axis are set with the same numbers, X axis being the lightest at maybe 45kg including the 30kg vice.
The Auto tune was run with the vice in place as well.

I like your PCBs. Very tidy.
Will see what I can find out about adding resistors

10
Mach4 General Discussion / Re: Glitch on X movements
« on: January 15, 2022, 05:35:45 PM »
The servo trips out because of the load it comes under while trying to move at lightning speed. The issue is, it should not be trying to move at those speeds in the first place.
And it doesn't do it on every gcode program. It doesn't do it if I write the program in the mdi.
I do have hlfb for the servos but now that you mention it and due to my lack of knowledge I would guess that Mach4 has no idea what to do with that input. I certainly haven't added any program to trigger E stop from hlfb.

Pages: 1 2 3 4