I usually ask my questions here, because I usually get great answers on all subjects. (smart group) I use Tcnc to cut foam with 4 axis foam cutter. Here is my...
Hi , I would monitor the current drawn. Assuming a constant resistance the heat will be proportional to Amps^2 (Ohms law etc). If the cutter wire is longer ...
EZ, How tightly do you need to control the temp? Are we talking 50 Deg, 10 Deg, 1 Deg, or 0.1 Deg? From a straight temp. perspective, you can connect a ...
... In theory, you'd keep the current through the wire constant and allow the voltage to float to whatever level it has to to maintain the current. In ...
Hi Ez, I've not cut foam. I assume you use some sort of "heater" wire (resistance element)? You probably want to know the current. Either an in-line amp...
Thanks for all the replies. There seems to be too many varibles, now add in room tempature. I guess what I am trying to accomplish is. Lets say that 100 ...
EZ, You can get thermocouple wire, either type-K or type-J for your purposes, down to 80 gauge or better. It can be spot-welded right to the heating element,...
Hi EZ, I have cut foam with a hot wire on my CNC machine. I have not found a temperature probe to be of any value as the temperature that is critical is down...
David, Sorry but I must politely disagree here. Clamp on meters are available for both AC&DC ranges. My Greenlee brand meter, and also my HEI model both have...
... You could try the obvious way :D Start at the minimum distance you anticipate using, fiddle with it until you get the right settings, and write down your...
Thru trial and error, I can cut to size, Im trying to eliminate the trial and error. So there are alot of varibles, but I think with a formula, I could...
Arthur: John's board does work with TurboCNC. It is unipolar, with voltage dropping resitors. With a 12V supply you will not get very high speeds. Set the...
I'm just kicking around an idea here I'd like to pass by everyone. What would you think about coming up with a new step/direction interface standard for motor...
Francis: FKeyBit does not read the TurboCNC configuration file. You can use the Port Monitor built into v4+ to do the same thing. Tony TurboCNC Development...
Alan: Acceleration - Feed Rate - Deceleration phasing for the axes. Axes with very little relative movement could still be trying to get out their only pulse...
Hi Mariss, It's a nice idea. The one drawback I can see is basic testing. I like to be able to single step using a switch & lamp box with a built-in pulse...
... Deadband Zone? I'd be concerned about losing steps or possibly moving in the wrong direction. On pin savings - as CNC moves to a windows environment, we're...
Mariss: I'd expand the concept to gain noise immunity. As an example, 1-2.5 us = CW, 3.5-5 us = CCW, and shorter than 1us is ignored, while 2.5- 3.5 us is...
If you want to kill this thread, its ok with me. Lets approach this from a different direction. I just looked at the spool of wire I use for cutting. It is...
Gents: Just want to bring to your attention Mariss' latest idea, he'd probably want some feedback. ... Mariss wrote: I'm just kicking around an idea here I'd...
HI EZ, Unless I'm mistaken, keep the same current, and the heat will be the same. Twice the length dissipates twice the heat, but it's divided over twice the ...
No, its me that didnt really understand, re-reading your first post, I guess this is what you said. This looks exactly like what I want to do. could you...
... Your friend is correct - heat is related to power (watts). ... Again, yes. ... Do you have any idea how much latitude you have in the wire temperature? Do ...
... Umm... could ya make it any simplier ? !!! seems like ya used one whole chip in there. : ) I've been looking at putting an RPM meter on my non-CNC lathe...
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