dyna cnc plasma cutting

[DynaCNC]

Originally Posted by StealthDumpKits ...not to ask the obvious, but why can't DynaCNC help?

We can help

[DynaCNC]

Originally Posted by fastimes great idea. i have thought about that or maybe if i contacted someone over the phone, using a webcam to show what it is doing. thank you for responding. sound like torchhead is the man. i checked out his website last night. pretty impressive stuff. maybe he will continue giving some advise. thanks mike for the tip. that is why we posted on here because seems that the more people involved the more things get brought up that you might not think of on you own.

fasttimes,

I am not really sure who you are. I am a bit suprised by this. I am not sure why this problem is a problem. We are always ready to help our customers.

Just an FYI: Tom (as pointed out by himself) produces our electronics. For the most par: They are exactly what you see on his web site. Some modifications, but mostly the same. I guess if you want to go right to the person that makes our electronics you are there. If this ends up to be an electrical issue he would be the right person to help. I really do not know who you are by your alias name on the zone, but all of these problems are normally taken care of from our tech support line first. I am ALL FOR the people getting help with issues out on the CNC Zone. I have a bit of a hard time with your comments about "find out why not to buy a DynaCNC machine". You are entitled to your opinion and I can appreciate your frustration, but costing us sales due to your comments does not really make my day.

We want to solve your issues. I am sure we have done everything to this point to get the problems solved. We are willing to keep working with you to finalize the issues and help you start producing products.

David Cress

[Torchhead]

You have to define "perfect". Plasma is not a precison cutting process. The thinner the material the harder it is to get perfect cuts. The smaller the circle the harder it is to make it round. Circles less than 1" in diameter are hard to get perfectly round especially in thin material. There are even technical papers on cutting small circles to get the best shape. It starts with a perpendicular lead-in from the center to the edge on an internal cut. In the past where I needed small circles that had to be round I rough cut with plasma smaller and finished with a drill or end mill on the VM.

The photos you posted do not appear to be close to what the machine is capable of but the cuts were also pretty small and the feedrate for thin stuff using conventional tips has to be really fast so small tight moves are done with a lot of "g's". The things I suggested are a form of troubleshooting to eliminate possible causes. Because the shipping crate is so stout internal (hidden) damage is more likely from mishandling. There has been a lot of it resulting in broken connections, bent shafts and other subtle problems. If something works at point A and when it gets to point B it does not, then something must have happened in between.

By moving the motor tuning down you help to eliminate one more variable. The servos DYNACNC uses are strong enough to twist the cape off Superman and will force something to move rather than just stall. (Stalling servos is a BAD thing). It does not necessarily prove the problem is the motor tuning but it just slows things down so maybe the cause becomes more obvious. It's harder to troubleshoot a bullet than a baseball without precison test equipment

Oh, and Mike......Texas is not so pleasant this time of year (especially THIS year) with days in the 100 + and no rain for weeks on end. We Texans do strike an attitude, but it's not lying if you can prove it! (:-o


I saw something in your original post about replacing some of the wiring and/or one of the encoder leads. Please explain. The servo encoder leads from the motors feedback to the Gecko drives in the cabinet on the table. Ususally they supply "differential adapters" (special leads with active devices on each end) that cancel any noise. Noise on the encoder feedback lines can cause some ugly stuff. It causes the system to thnk the motor is some position it's not.

Also too little gain in the servo tuning or too much dampening (both adjustments on each drive) can cause overshoot and oscillation of a motor. While there are real technical ways to adjust both that invlove a scope, you can usually get close by adjusting the gain so that the motor just "hums" while sitting still. It is quickly moving from one encoder line back and forth to try and satisfy zero error but never will just stop. If you try to move/twist a powered servo it should resists your attempt. You can feel the ever so slight change in vibration as you attempt to twist.

I don't advocate messing with the servo tuning without direction from the factory but if one motor seems to be vibrating at a much lower rate and reacts differently you might ask them about the servo tuning on that axis.

Make SURE all of the couplings, setscrews belts and mechanical parts are tight and have no play. Make sure the pinion engages the rack fully along its entire length. Move the axis slowly by hand and watch the gear and also feel if there is any backlash or increased resistance. If the rack has shifted during shipping and the pinion does not engage correctly you can get postional problems. The gantry rides on linear bearings and the pinion gears interface with the rack is controlled by the vertical postion of the rack. A few thousands of too high or two low can cause problems.

Once we determine that the problem is not mechanical then we can focus in on the electrical part.

[Torchhead]

Originally Posted by StealthDumpKits ....crossing DynaCNC off my list.

Your "list", if you don't want to spend 10X the cost of a DYNACNC, and still want a quality machine has just gotten really thin. Since I think DYNACNC is in the top three in it's class, you have just eliminated 1/3 of your choice. There are others that offer the promise, but they are 100% proprietary, meaning they use special software, special electronics, and even special motors (ala DynaTorch). I have NEVER seen an admitted employee (much less the owner) from the other brands post on ANY open list.

I suggest you consider building your own machine. That way you will have exactly what you want and if "tech support" can't fix your problem you have the power to instantly punish them

[fastimes]

Originally Posted by DynaCNC fasttimes, I am not really sure who you are. I am a bit suprised by this. I am not sure why this problem is a problem. We are always ready to help our customers. Just an FYI: Tom (as pointed out by himself) produces our electronics. For the most par: They are exactly what you see on his web site. Some modifications, but mostly the same. I guess if you want to go right to the person that makes our electronics you are there. If this ends up to be an electrical issue he would be the right person to help. I really do not know who you are by your alias name on the zone, but all of these problems are normally taken care of from our tech support line first. I am ALL FOR the people getting help with issues out on the CNC Zone. I have a bit of a hard time with your comments about "find out why not to buy a DynaCNC machine". You are entitled to your opinion and I can appreciate your frustration, but costing us sales due to your comments does not really make my day. We want to solve your issues. I am sure we have done everything to this point to get the problems solved. We are willing to keep working with you to finalize the issues and help you start producing products. David Cress

oh hello david. i could probably give you one good hint as to who this is. but the only thing is as stated in the first few posts and the last long one, i am not on here to bash your company. i guess you were probably told about this thread as to why you are on here because it has been a month since your last post in a thread were someone was bashing your company. there is no sense in you and i smack talking back and forth on here about this. you know everything about me and have my # to call if you would like to discuss this. i'll bet if you think real hard as to all the things i have said you should know. if not, you will tomorrow when you and steve get in the office because there is a voice mail from us to him from thursday, and emails of all the pics from this thread plus some i am getting ready to post for torch head, and a voicemail for him from friday to which he was out for the day, so that would explain why we didn't hear from him on thursday afternoon. i am not doubting that steve could help, but when we had these probs thursday and we didn't hear from him and friday he is out, we had to look farther. it is kind of like if i have a customer standing in front of me wanting something cut and something happens to our machine and we have no idea what it is doing and steve doesn't call us back, i have to resort to something else. so with that said, had i have never posted on here then sometime tomorrow when we hear from steve we will be at least 2 days farther behind because we didn't find out some things we have learned over the weekend till monday. now if you still might not know who this is that might not be a good sign because that might tell me you may have more than just 1 customer that is not happy right now. besides that if you would go back and read how this all started, we were asking if the parts were a program, machine, or operator prob. never did we say this machine stinks and look what it is doing. when your tech doesn't get back to us for what ever reason or your office is closed, then we have to look farther. don't worry we will be using our tech when we can. now. once you figure out who this is, i don't think you will need to post back, and you will probably realize that we have a legit excuse for what we are doing. and sorry about telling the truth to the guy about ask me who to buy from, but the experience i have had with this (one of the top 3 machines) as torch head would put it, it hasn't made my year.

now with that out of the way. tom. if you seen the edges in our pics, that is what i am consider not a perfect circle but i would think it should be better than that. we were told from the start by the salesman from dyna that their machine would cut a perfect hole. even small ones. as i stated earlier, we saw a plasma cam run and the guy told us that you can't cut small holes perfect. we saw that with our own eyes. we also went as far to send some metal to a guy in texas to cut some things with his practical cnc and his holes sucked also. so we did some pretty extensive research before we committed to this machine. but when we were told dyna would, that is what helped make our decision. as far as the holes, we kind of knew going into this that we may have to ream holes. but the circles we have been cutting are at least 5". the feeds we have ran are at 200 or alittle faster and we seem to get a pretty good bevel. if we slow it down to 50 to 75ipm the bevel got better but slag was harder to remove.

ok about the wiring. when we first got this table, nothing would move. i mean nothing. we started tech help and finally got y and x, but z acted funny. it was getting hot just sitting still. finally after a series of tests through tech, he determined that something in the wiring was wrong. x kept crashing for no reason when power was supplied and we kept blowing fuses. also the transformer and capacitor were getting extremely hot. steve wanted everything back. from motors to control box. this was in a weeks time of getting machine. ok. now, at least 2 weeks go by and finally we get everything back. now, they replaced z motor and according to steve everything in the control panel. we put machine back together and z takes off the minute power is hooked up. now through a series of other tests, we have found gecko is bad for z. new one gets sent and still z is running wide open. through another series of tech support we determine that encoder is bad. now mind you we were told that they had everything running on a table at their shop. so they can't figure out what is wrong. now i don't really want to hear that it was running there because it's not doing me any good here with it not working. finally just 2 weeks ago we figured out it was the line booster on z. steve said i will get you one on the way (which has been over a week and no booster dave) and told us it will be fine to run with out it. do you think this could be the problem. now on to x. it started blowing fuses just sitting there and making a loud buzzing noise. dyna had us adjust the screw to the left on the gecko counter clockwise until x quit moving and when it does turn just alittle clock wise until it moves again. z is pulsing pretty strong. haven't got to introduce that prob to them yet. now i ask. should a top 3 machine have these problems. i know you may have issues, but like this. is it normal. it is hard for me to believe everything is fine at their shop and wrong here. are these machines that sensitive. we just bought a 30grand driveshaft machine which is a cheap machine, and have had no problems with it. in fact we bought it just 2 months ago and got it running and making money before the plasma table. granted it isn't a cnc machine but still it is a mechanical piece of equipment. i am going to post some pics of the gantry issues. tom, let me know if this will have anything to do with our problems. i think you will be able to see what the pics are from. now before anyone says we might have done something wrong, all we have done is pull motors and wiring off. nothing with brackets or gantry. tom i really appreciate your help. we may want to get with you on some things anyway. let me know what you think on these issues posted.

http://i37.photobucket.com/albums/e5...dynacnc007.jpg
http://i37.photobucket.com/albums/e5...dynacnc006.jpg
http://i37.photobucket.com/albums/e5...dynacnc005.jpg
http://i37.photobucket.com/albums/e5...dynacnc004.jpg
http://i37.photobucket.com/albums/e5...dynacnc003.jpg
http://i37.photobucket.com/albums/e5...dynacnc002.jpg
http://i37.photobucket.com/albums/e5...dynacnc001.jpg

should this be normal.

[Torchhead]

It appears to me that the machine has been damaged but the slant of the Z is not causing your circle problem. It is important that the torch be perpendicular to the work. It would also sound like from the previous problems that other things were damaged since the entire power supply sounds like it went out.

Your response back to Dave and your ramblings and comments about "you should know who this is" and your desire to get confrontational rather than work with me on some testing leaves me no choice but to step out of this.

You need to work with DYNACNC to get this fixed. The way you get help is to approach things in a business way and not sucker punch the one organization that can do the most to get you running.

Outa here

TC

[PowerCNC4u]

Well I guess we can all see who the messed up person is on this one. Wow. I feel sorry for him. First he gets a machine he does not know how to run, and then pisses off all the people that are willing to help him.

Kind of makes ya wonder.......

From the photos posted it looks like the table was never leveled at their location and that the Z axis got pushed down from bouncing in shipping. Easy fix. Losen 4 bolts on each side of the bridge and turn back to 90 degrees. Tighten the 8 bolts. Tough job but somebody has to do it. I can't see anyone flying out to do that for a customer. One would think with all of the equipment fasttimes has, he certanily would know how to do that? I am sure if the table was never leveled the bridge could bind which could easily cause the circle problem. Opps I'm showing my intelligence again. I'll stop. Someone might think I am helping by accident.

Kind of makes ya wonder......

I thought it was very professional what Dave had wrote. It showed what I have seen all along from him, A great professionalism. Thanks Dave. You are not wrong on this one. I back you 100%.

I love my DynaCNC machine. You make a great machine!

[jlenelms]

thanks for making my decision easier i'm considering buying a 5 x 10 table and am also new to the cnc biz. i want to be sure i get immediate customer service and if this is how the owner handles problems it sounds like i need to keep looking. Torchead i saw ur post about 3 but only caught 2 names any other suggestions Price Range $20000-$40000 or am i better off looking at a high end good quality used table. i had been leary to do so but sounds like i couldn't be any worse off than this guy??

[jlenelms]

does everyone here work for this dave guy? come on guys i can see this guys problem like i said i'm shopping and they are all promising the moon. How can i know who will deliver? i am just a small shop and it would be devestating to my buisness to be in this guys shoes i mean he said 4 or 5 Months thats a long time to wait on a cut and i wouldn't know how to troubleshoot a plasma table either

[PowerCNC4u]

Originally Posted by jlenelms does everyone here work for this dave guy? come on guys i can see this guys problem like i said i'm shopping and they are all promising the moon. How can i know who will deliver? i am just a small shop and it would be devestating to my buisness to be in this guys shoes i mean he said 4 or 5 Months thats a long time to wait on a cut and i wouldn't know how to troubleshoot a plasma table either

I don't think anyone here works for this dave guy. I really find it hard to believe that this one persons opinion has sturrd up this consistant junk. I personally do not believe him. He has stated that he knows nothing about cnc, cad or cam. He has also stated that DynaCNC has fixed his problem. He has a couple of questions that may or may not be a problem with the machine.

Personally it looks like he needs training badly. All he has done is put people down and complained. Pissed people off that have tried to help him.

I have to admit, I know I would not take his advice on anything related to cnc. But, you be the judge based on what you think.

I saw a company owner (Dave) respond to a alias person badmouthing his company in a professional manner. The person still remained an alias hiding his idenity.

Kinda makes ya wonder......

Believe who you want, but this looks really fishy to me.

[fastimes]

sorry jlenelms. didn't get to reply to all your posts. but keep reading. this should get worse. table is good quality. just some probs on getting it from the company and contacting issues on their part. just do some real good research before you buy.