March 25, 2015 No Responses

AVHC Torch Lockout Update

It’s been a little while since we’ve had a blog post!  After a few big transitions and a few more to come we’ve got lots of exciting things in the works to show.  So all excuses aside, there will be more blog posts to come about the work that has flowed through Mint over the last while!  There have been a few people asking about more detail and video about how the AVHC corner/torch lockout works on our table.  So this is a continuation of our AVHC Corner Lockout for Holes blog post.

These two video’s show how well the AVHC lockout performs with having the CAM portion setup correctly and that information being fed to the TM4 software and ultimately controlling the CNC plasma table.  Long story short the lockout allows the torch to run at 60% the recommended straight line cut speed.  The reason for slowing it down is to allow for a straighter hole with less to no taper.  Imagine hanging a bat by holding the end with two fingers, the bat is the plasma arc and your hand is the torch.  If you move your hand quickly the bat is going to lag behind the movement of your hand.  Now do a quick circular motion.  You’ll see that the tip of the bat (furthest from your fingers) will naturally want to point to the center of the arc.  Now the stiffness of the arc is like changing the weight of the bat, in most cases we can’t change that, but what we can change is how fast our hand or torch moves.  So slowing down the movement keeps the tip of the bat lagging behind your hand less.  This is the same principle as with the torch and plasma arc, slower movements in area where there are tight arc’s or heavy directional change features that are critical to the function of the part (bolt holes, slots etc…) warrant slowing things down.  This is why high definition plasma, laser and water jet have very good cut quality, it’s due to the stiffness of the arc or water jet, however at an increased cost.  Take a look at our videos and enjoy.

Cutting Video

TM4 Controller Video

The holes were lightly chamfered, no drilling or grinding of the ID of the hole was necessary.  These are all blasted and ready for powder coating.

AVHC Torch Lockout

Fresh out of the oven after being powder coated wrinkle black and ready for customer pickup!  The items on the left will have a glass sheet put inside the part and it will be installed and used as a flame inspection port.  The items on the right are a badge to be installed on an old school Toyota truck.

laser cutting saskatoon

Stay tuned for more blog posts!  If you like these posts please subscribe, if you’re interested in a future project, please contact us on our Contact page.

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