Apocalypse Fabrication
I was going to order about 24 of them. I dont expect Bulltear to just give them to me. I am the one that obviously stripped them out. If I could get a part# and a supplier; I would be more than happy. I have been browsing the 8020 site and the array of options is making my head spin.
We are getting vibrations during x axis moves when the torch is located in the middle of the y axis gantry. It's giving us jagged cut edges. However, when the torch is near either end of the gantry; it cuts fine. Tomorrow I am going to fasten the table into the concrete slab of the garage in an effort to strengthen it up. If that doesnt work, I want to add some "spines" to strengthen up the y axis, using t nuts to fasten them on.
Apocalypse Fabrication
I dont have the gantry in front of me to measure, but is it 3030 series? Will these studs work?
[url]http://www.amazon.com/80-20-Inc-Series-Drop-In/dp/B006ZCLONO/ref=sr_1_cc_2?s=aps&ie=UTF8&qid=1363128860&sr=1-2-catcorr&keywords=80%2F20+t+studs+5%2F16-18[/url]
I think those would be way easier for my application, since I wouldnt have to unbolt the whole gantry to install more t nuts.
Thanks
jeepsr4ever
I will send some for you no problem. If your getting vibes its not from flex.
Apocalypse Fabrication
Thanks Matt
What's your theory on the condition? I am wondering why it vibrates in the middle of the y axis, but not on the edges. Obviously, I will know more after I get it bolted down.
jeepsr4ever
Get it bolted up first. Sometimes its the Mag-lok not being stiff and that is easy to adjust by the two bottom 1/4-20 bolts and/or the two 90 degree screws for the back of the torch plate. You should not get flex in the middle of the gantry. You may also get some flex from the Y axis truck if it isnt adjusted to a hard preload. We are setting Y axis trucks before they go out the door now so gantry kits users wont have to adjust them. It is a challenge to explain that the truck needs enough preload to be hard to move before installing the beefy Z axis. After installing the Z axis the truck relaxes its preload some but stiffens the movement. I would start with bolting the gantry together properly before making any adjustments.
Apocalypse Fabrication
The y axis truck was preloaded from the factory on my kit and felt like it was set properly upon install.
I am bolting the table frame to the floor. The gantry has been bolted together, properly, quite a few times now. I am familiar with the preload procedures, since if you remember, I had to reset my x axis trucks.
Apocalypse Fabrication
The table was bolted to the floor and I preloaded the y axis truck some more. The cut quality got much worse on the last cut we did. I think I will back the truck back off again and maybe raise the THC dampening rate. Frustrating as always.
jeepsr4ever
What are you trying to cut, thickness? Speed, amperage and tip volts please. Also what about your torch are you using a sheilded cap or the deflector ring?
Apocalypse Fabrication
Hypertherm 65 with Full size machine torch
Finecut Consumables
150 ipm cut speed
.06 cut height, with THC on
75 torch volts
40 amps
Deflector ring, since I am pretty sure you cant use the shield on FineCut.
16 gauge CRS
We are getting sporadic jagged cuts. Sometimes it cuts perfectly, but the next letter will be jagged. Sorry I dont have any pics at this time. I can have Katie post some if needed.
jeepsr4ever
Oh also make sure your THC rate is no more than 20. At 30 it will oscillate when it turns THC back on after locking it out for the corner movement
Apocalypse Fabrication
[QUOTE=jeepsr4ever;132995]Oh also make sure your THC rate is no more than 20. At 30 it will oscillate when it turns THC back on after locking it out for the corner movement[/QUOTE]
I will check tonight... thanks
jeepsr4ever
Also keep in mind if you get to an edge sometimes the air coming out of the tip will wiggle the material to make it look like a jagged cut. You could try dropping your amperage and cutting slower to see if there is a change. But at 75 tip volts something is wrong as you should be well over 120 tip volts. You probly have the division wrong in your plasma cutter and PWM box. Do you know how to check? The plasma cutters usually ship at 50-1 ratio and the PWM boxes can go out either 7-1 or 20-1 so that would explain the tip voltage issue. To check uscrew the 4 screws from the bottom of the black box and take the cap off and not where the jumper is sitting. There are instructions on your support disk for that as well. Make sure the CPC card in your Hypertherm and the black box are using the same division. You may just have to move the jumper. The best division is 20-1 this gives the most accurate THC next to Hypertherms Hydef. Make sure the CPC in the plasma cutter is set to 20-1 and the PWM is set to 20-1.
jeepsr4ever
If you need to please call in if your stuck. 1-651-257-7917 someone here will walk you through it.
Apocalypse Fabrication
[QUOTE=jeepsr4ever;132997]But at 75 tip volts something is wrong as you should be well over 120 tip volts. [/QUOTE]
75 is the voltage spec given by hypertherm for their low speed mild steel cut charts. Dont worry about the voltage divider, it's been correct for months... at 20:1 in both.
jeepsr4ever
Ah yes the low speed cut chart. We need to find out if its the Z axuis oscillating or where the wiggle is.
