Delay before piercing

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Delay before piercing

Postby Rad » Fri Feb 16, 2018 6:58 pm

Hi, there is a slight delay maybe about 2 to 3 seconds when my system is doing inital height sensing. What happens is that the torch goes down finds the surface of the material but remains on the material for about 2 seconds before coming back up to pierce height. I only notice this happening with UCCNC there was no delay when I was using Mach3. Is there anything I could check to make the delay shorter. It would sure save some time when doing jobs with lots of pierces. I am using a floating head and sheetcam mp1000 post processor. Thanks
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Re: Delay before piercing

Postby Vmax549 » Fri Feb 16, 2018 7:21 pm

Can you post a sample of your gcode where it senses the top of the material and up to the M3.

What UCCNC controller ?
What version of UCCNC ?

(;-) TP
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Re: Delay before piercing

Postby Rad » Fri Feb 16, 2018 7:28 pm

Will try to get a gcode sample
UC100
1.2038 (I think)
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Re: Delay before piercing

Postby cncdrive » Fri Feb 16, 2018 9:27 pm

Check the delay values setup on the spindle setup page for the M3 and M5.
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Re: Delay before piercing

Postby Rad » Sun Feb 18, 2018 1:57 am

I see the delay is zero on the spindle setup page.
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Re: Delay before piercing

Postby cncdrive » Sun Feb 18, 2018 3:57 am

I re-read your post a few times and if I understand you correctly the delay happens when the surface is touched and not when the torch is turned on, is this correct?
So, if I understand it correctly the delay happens when the surface is touched and before the torch goes up and only after is the M3 torch on command,
so the delay happens when still the surface touching is in progress, correct?
If it is then the delay is in the surface measurement routine. Which macro are you running to measure the surface? What code is in that macro?
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Re: Delay before piercing

Postby Vmax549 » Sun Feb 18, 2018 5:32 am

He is using teh MP1000 post in Sheetcam. Teh top of material routine is in GCODE. It normally uses the G28.1 method but some versions of teh MP1000 used the G31 method.

I wanted him to post a sample of his Gcode to see IF there is anything in the Gcode that would cause the delay.

I have seen bad switches on teh floating Z ( Zhome) cause a delay if they did not make good contact but that depends on if teh switch is NO or NC.

(;-) TP
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Re: Delay before piercing

Postby cncdrive » Sun Feb 18, 2018 6:17 am

Hi Terry,

Yes, it would be good to see at least one sample g-code file.
And if it runs a macro to touch the plate then I should also see the macro file, or if there is no marco call for the touch then a g-code file is enough.
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Re: Delay before piercing

Postby cncdrive » Sun Feb 18, 2018 6:35 am

I've just tested the UC100 probing with a simple g-code file with the G31 in the g-code file:

Code: Select all
G0 X0 Y0 Z0
G31 Z-100
G1 X0 F100
G31 Z-100
G1 Z0 F100
G31 Z-100
G1 Z0 F100
M30


This code runs fine without any noticable delays.

So, I will need a sample g-code file...
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Re: Delay before piercing

Postby Vmax549 » Sun Feb 18, 2018 1:34 pm

Hi Balazs, This is a typical TOM that teh MP1000 post puts out.

N0100 G00 X7.2970 Y5.5627
N0110 Z0.1200
N0120 G28.1 Z0.12
N0130 G92 Z0.0
N0140 G00 Z0.0520
N0150 G92 Z0.0
N0160 G00 Z0.1200
N0170 M03


It uses teh G28.1 but there are versions that use a g31 where teh G28.1 is used. It works teh same both ways. Using teh G31 allows youto set Zhome at teh top of teh Zstroke instead of the bottom.

(;-) TP
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