Machsupport Forum
Mach Discussion => Mach4 General Discussion => Topic started by: Frederic1231 on December 11, 2019, 05:21:47 PM
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I have bought Mach 4 last week as an upgrade for Mach3.
I have a Plasma table with PoKeys57CNC and a PlasmaSense THC unit. I am using a Floating Head configuration.
I am using the Plasma Screen and I got the THC working but sometimes while Probing it stops the cycle.
Macro Alarm: 3 The Probe did not strike during our M3 touch move.
But the Probe signal is activ if I look at the diagnostic page.
This problem randomly occurs.
Any clue?
And my value in the dros of the THC settings screen are changing every time I restart Mach 4.
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You are either running out of travel (need to make the max probe distance larger) or have a noisy/bouncy input signal. Lots of post on this forum on how to troubleshoot and fix noisy/bouncy inputs. This one good example.......... https://www.machsupport.com/forum/index.php?topic=42086.msg274439#msg274439
The values in the DROs are changing because your machine units are mm or the Gcode your running is in mm mode. This has been fixed but not in a build yet. It should make it into the next build.
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My max Probe travel is at 100mm and my min max THC 100 and - 100 it is more then enough.
I have no soft limits enabled.
The problem only occurs on the m3 Macro not in other Z Probe Funktions.
The I use shielded and grounded wires.
The PoKeys57CNC has some input filtering built in. And I played with the software filtering as well.
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I am having this same issue with Mach4 Plasma and Pokeys57CNC. If I type M3 into the MDI and press start it will work sometimes, and other times I get the error "MACRO ALARM; 3 The probe did not strike during our M3 touch move.". If I use G31z-3 in MDI the probe works without an issue. I've tried installing an RC filter, but that didn't seem to help.
I attached a log of my probe testing with the Plasma torch turned off. The first and the third probe were successful, the second one shows the error.
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i use also pokeys for woodworking cnc ,we use alot with probe,only with G31
never have problem,only with travel limit,so we add in the begin of the M function of the tool hight detect,disable the software limit
and at the end of the m function enable
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Did you ever find a solution to this problem ?
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Did you ever find a solution to this problem ?
I start playing few days now with my plasma and HTC, i have Pokeys57 and Plasmasens. Few tries i make, when i had the ohmic sensor on from Mach4 module i did get random times macro alarm 3. I turned off ohmic sensor and add probe move to my post processor, for now i don't have this error.
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I think thats what Im going to do, i will use the Mach3 post processor in sheetcam . This seems to work a lot better.
Can I also ask what settings you have in Mach4 for you THC anti dive etc ?
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Can I also ask what settings you have in Mach4 for you THC anti dive etc ?
Anti dive for now i have it off, the rest depends on your plasma cutter. I have a Chinese HF plasma with a lot of modifications on electronics to work, my settings will not work on you.
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How have you turned anti dive off ? I`m struggling to understand what values to use for the adjust rate
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How have you turned anti dive off ? I`m struggling to understand what values to use for the adjust rate
You use Mach4 or Mach3? For mach4 you go to configure/plugins/regfile and there are all the options for THC and more, you find the nf/thc/AntiDiveState and change it to 0 so it be disabled.
Adjust rate is the % of the feedrate you want the TCH to make corrections on Z Axis. If your Z axis velocity is 2000mm/min and you put 10% adjust rate then your THC will correct with 200mm/min.
Are more options but if you use Mach3 aren't for you and better ask Mach3 topics for help.
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Thanks for the explanation, I use Mach4 but notice the Regfile doesnt match what I have set in the GUI ? in fact its in Imperial and not Metric I will have to do some experimenting.
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Thanks for the explanation, I use Mach4 but notice the Regfile doesnt match what I have set in the GUI ? in fact its in Imperial and not Metric I will have to do some experimenting.
Check this nf/thc/DeadBandWidth default is 5, if measured voltage is -/+5V then the THC is disabled. I have it to 1 but my electronics measure very low voltage 0-5V.
Yes the default values is inches but Mach4 not understand metric/inches, just put the values you want.
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Great thanks for the help, I will be doing more testing later today.
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Hello I’m really struggling with my pokey 57 and the plasma sense thc I can’t get it to work if I do a test run plasma cutter on it arc but won’t read out the voltage someone any idea
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You have to set the property of the Actual Voltage DRO to the Pokeys PlasmaSens HV register.