Pierce point advise!!

[Tblazenko]

Suggestions on what setting to change to eliminate this pierce points. Hypertherm 45xp using book settings. Using sheetcam an Mach 3. Thanks.

[tnbndr]

In SheetCam in your tool set, play with the lead in and lead out setting. I use .125 for both. This will have the torch pierce inside the scrap part and move to the cut line.

Sheet Cam Lead In.JPG (59.17 KiB) Viewed 844 times

Sheet Cam Lead In.JPG (59.17 KiB) Viewed 844 times

[djreiswig]

Try shortening your pierce delay. If the metal is thin enough you might not need any delay.
You can also move the start points around so they are in less conspicuous areas.

[Tblazenko]

thanks I will try both,

[robertspark]

Turn the leadout off.

Are you using thc?

How are you turning it on and off?
Suggest using M11 for on and M10 for off
What motion controller are you using.... As some do not provide M11/M10 functionality.... It has to be part of the firmware of the motion controller as it is NOT controlled by mach3.

You are using a perpendicular leadin.... Which is recommended (by hypertherm) but does your machine have enough acceleration to pull off a 90 degree turn at the desired feedrate... You may benefit from a small arc leadin and a little overburn to compensate for the arc. (Or the cut may stop short of the leadin arc)
The size of the arc is dependent upon your acceleration and 60% of the desired feedrate.

Radius = (0.01 X feedrate(per min)) ^2 / acceleration

If you have a sharp corner (or perpendicular leadin) the machine has to slow down in order for one axis to slow down and the other to speed up..... Mach 3 lacks the ability to control the blended motion which is provided in other newer software such as mach4, linuxcnc, and uccnc via G64 (eg http://linuxcnc.org/docs/2.6/html/gcode ... ml#sec:G64)


Divot chasing can prove time consuming

[chilco]

Try shortening your pierce delay. If the metal is thin enough you might not need any delay.
You can also move the start points around so they are in less conspicuous areas.

So I have a cheap table, langmuir crossfire pro that does great, but I can't operate on 16 gauge at Hypertherms book settings of .01s.

The machine moves before piercing or it was I can try again today. Any suggestions on that?

[robertspark]

You need to wire up the arcok / arc transfer signal up from the hypertherm and enable the torch height control function.

Yes know you don't have thc, but this signal tells the dwell to wait for the arc transfer signal and THEN the pierce delay starts.

Not as soon as M3 / torch fire is given