Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa

bbsr_5a
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06 Jun 2020 11:13 #170343 by bbsr_5a

Replied by bbsr_5a on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa

the first steps are the hardest to get
but you are well in the line of going the right way
dont forget to bridge the gnd to the different cabinets
the high step uses a chargepump as i recall

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msageryd
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06 Jun 2020 11:22 #170348 by msageryd

Replied by msageryd on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa

Charge pump needed?
I don't think I can disable the need for charge pump in my controller. I'm hoping that I can get this output from the 7i96.

linking to separate thread for documenation:
forum.linuxcnc.org/27-driver-boards/3925...a-7i96-in-4-1-config

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bbsr_5a
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06 Jun 2020 11:54 #170352 by bbsr_5a

Replied by bbsr_5a on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa

if you rewire the intirer cabinet woudt be mutch better in times of E-safty then going to the Bord that the machine got
also you benefit the most from Hardwarestepping direct from Mesa to Driver
i guess you are going to wire from Hardware to analog HCT chips inside the Machine dont go that way

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msageryd
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06 Jun 2020 12:04 - 06 Jun 2020 12:21 #170354 by msageryd

Replied by msageryd on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa

@bbsr_5a I don't quite understand. I might have been unclear on my setup.

LNCNC "talks to" 7i96 via ethernet
7i96 is connected with my HighZ controller (www.cnc-step.com/5-channel-stepper-motor-controller/)

The HighZ controller is wired to the steppers, etc. I actually don't know whats in that cabinet besides motor drivers. The HighZ controller also outputs 0-10V for my spindle if I give it a PWM signal, hence the 4+1 configuration of my 7i96.

Now I fear that I cannot get a charge pump signal out of the 7i96. There might be some possibilities (I' totally guessing).
- Somehow configure the 7i96 to 3+1+1
- Or maybe get a charge pump signal out of the expansion connection?

Last edit: 06 Jun 2020 12:21 by msageryd.

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tommylight
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06 Jun 2020 12:18 #170357 by tommylight

Replied by tommylight on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa

You keep linking to a non existing file/PDF.

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msageryd
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06 Jun 2020 12:20 - 06 Jun 2020 12:27 #170358 by msageryd

Replied by msageryd on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa

Oh, sorry. These links should work.

www.cnc-step.com/5-channel-stepper-motor-controller/

PDF: www.cnc-step.com/wp-content/uploads/2019...ns-Zero-3-35A_EN.pdf

Last edit: 06 Jun 2020 12:27 by msageryd.

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tommylight
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06 Jun 2020 12:43 #170360 by tommylight

Replied by tommylight on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa

I liked cnc-step a lot, they make some nice machines for nice prices, i do not even mind that they used my idea for an engraving head, at least they did a much better job of implementing that idea, but i do mind them saying the machine has 10 microsteps, it does not, it has divider by 10, so for 9 steps the machine does nothing. Looks like they are using Gecko drives, they are pretty nice, but again no microstepping and they are way overrated for voltage.
Back on topic,
If you have all 5 step/dir outputs used, the only solution for the charge pump is to use the header I/O, and that would most probably need modified firmware, so might want to wait for PCW to answer that.

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msageryd
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06 Jun 2020 12:55 #170361 by msageryd

Replied by msageryd on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa

Cool. Yes, the engraving head works great. I didn't use it much though, and now it's unusable because my retrofit with another spindle and a custom z-plate.

I currently only have 3 axis. I'll probably never get around to implement a fourth axis, so I suppose, theoretically, I could use step03 as charge pump. Would I need another firmware for this? Do you know if such firmware exists?

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tommylight
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06 Jun 2020 13:07 #170362 by tommylight

Replied by tommylight on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa

msageryd wrote:
I currently only have 3 axis. I'll probably never get around to implement a fourth axis, so I suppose, theoretically, I could use step03 as charge pump. Would I need another firmware for this? Do you know if such firmware exists?

Yes, you can use the step03 as charge pump, but not sure about the firmware, been some time since i used that.

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msageryd
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06 Jun 2020 13:18 - 06 Jun 2020 13:19 #170363 by msageryd

Replied by msageryd on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa

Thanks again.
I hope I'll get some answers on this. Best solution seems to be a 3+2 firmware.

In the meantime I'd like to go on with the configuration. Without charge pump I can do nothing. Do you know how the HAL code would look for using step04 as charge pump?

I suppose I'd have to define a frequency and enable it. How do I know what frequency I need? I've read 10 kHz in this forum. The Smoothstepper FAQ says 12.5 kHz. warp9td.com/index.php/faq#ChargePump

Last edit: 06 Jun 2020 13:19 by msageryd.

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