wickedinhere
My THC seems like its not reacting fast enough i normally cut 16 gauge and its pretty wavy. By the time the thc reacts and moves up it needs to move back down but takes too long and the torch is too high to cut. I know there is a way to make it react faster but cant fine any good info on it.
jeepsr4ever
Span gap and THC rate. Span gap is located in your cut profile and THC rate on the settings tab.
wickedinhere
My THC rate is at -30 that was the setting it was at i did change it. Should it be a negative number? I would think it be 30 or +30 not -30.
jeepsr4ever
-30 Is fast and can work change your span gap 2-5/4
jeepsr4ever
[QUOTE=wickedinhere;132588]My THC rate is at -30 that was the setting it was at i did change it. Should it be a negative number? I would think it be 30 or +30 not -30.[/QUOTE]
Yes negative number is just how it shows up
wickedinhere
Ok got it i changed it to 20 and it was alot better I will try changing the span gap.
wickedinhere
Here is a pic of the settings, i completely forget about the cut profile settings i will adjust them next. What about the 60% setting above is that correct or should i change that?
[IMG]http://i20.photobucket.com/albums/b235/wickedinhere/photo560.jpg[/IMG]
jeepsr4ever
Antidive is a corner lockout meaning if your motors decel 60% lower than your programmed feedrate (think corners) THC locks up until it reaches 61% of the feedrate then THC unlocks.
wickedinhere
Ok got it.
jeepsr4ever
Alot of things in motion you have used for along time working together to give you good cuts. When you start to cut exotic material and corrugated you want to learn where and when to tweak these options. The best part is your table is part of the 1% of machines out there that allow you to actually change any of these values.
wickedinhere
Well still not working right for some reason. I put in all the info in the cut profile but it hates me .LOL I set the preset volts to 117 like the book says, start cutting and the tip volts will go up and down +or-20 volts and the torch will not move then sometimes it will go up but not back down when it should. Its crazy because the first time i tried it on 16 gauge it worked pretty good but now it doens't matter what metal thickness its like it works when it feels like it.
jeepsr4ever
Sounds like your serial port has a conflict.
wickedinhere
How do i trouble shoot that?
jeepsr4ever
First I would restart the PC then try just running mach 3 and nothing else and see if THC works properly.
BigYellowIron
Can you provide us dummies some baseline settings for the THC. I Havent cut much with mine yet. Every time i cut the TCh will work fine for several cuts then will just start slowly getting closer to the plate then knock the torch off or blow out the consumables.
jeepsr4ever
Ok here are the big 5
1. [U][B]THC delay [/B][/U](This is the time from the start of the plasma *pierce to the time Torch Height Control starts...you want this value long enough to get into the cut at your cut height)
2. [U][B]THC rate[/B][/U] (This is the value of the the THC will move the Z axis...ie the acceleration and decelleration..superceeds your accel rates in motor tuning)
3. [U][B]Antidive[/B][/U] (If you set this at 50% and your speed is 100IPM and when the machine starts to slow down to corner when it gets below 50ipm it will lock the Z axis so THC doesnt plunge the tip into the material then at 51ipm will unlock THC...typicall set at 19% for most speeds under 200ipm)
4. [U][B]Span gap[/B][/U] (this reading in quarter volts tells the THC when it should react so if you set it to 4 that would be 1 volt then if the actual reading goes out of 1 volt it will move the Z up or down)
5. [U][B]Tip Saver[/B][/U] ([FONT=ArialMT]This value determines the lowest the DTHC will let the torch head go before it locks movement. It[/FONT][FONT=ArialMT]’[/FONT][FONT=ArialMT]s a percentage of the Preset Tip Volts. It constantly measures the actual tip volts and if the value is too high it keeps the Torch from moving down any lower. Like a spike in volts from passing through a cut you already made)[/FONT]
BigYellowIron
Any ideas on what could cause my issue i described in the previous post? Thanks for the definitions
jeepsr4ever
Put in a bigger number for your tip volts first. Also post up your THC delay number and tip volts, amperage and cut speed.
BigYellowIron
ill be doing some more cutting this weekend. Ill try it again.
wickedinhere
Banging head. LOL ok I set the limits so that it wouldn't raise up too far when i first started using the thc well the limit went back to 1 inch and it wont let me change it.
I dont have anything else running on the computer i only use sheetcam and mach 3 and never have anything open when running mach 3. It seems to work sometimes and then nothing at all. Its crazy because it had worked for a little while.
