pic: FRC228 Tormach CNC Mill

[ProgrammerMatt]

Originally Posted by Mk.32

It appears you are running water for coolant.... and I see rust spots forming. You want to use actual coolant mixed with the water to prevent rust and it cuts better.

If you guys use Solidworks this may be worth checking out: http://www.hsmworks.com/hsmxpress/

The xpress edition is a free plug in for Solidworks, and lets you create 2.5D tool paths within solidworks (it adds another tab), it's quick and really easy for anyone to learn. It also has a Mach2 post built in that runs happy with the Tormach branded Mach3. Also I recently called them up and they gave us the full edition (which includes 3D Milling/4th axis/etc) for free on a educational license.

We are using water based coolant, which was came with the machine. The vice itself was donated to the team by my father who had it sitting in my basement, we just haven't had time to polish it yet.

We'll defiantly give hsmworks a call and ask about the full edition, that would be awesome! Thanks for the lead!

-M

[Mk.32]

Originally Posted by ProgrammerMatt

We are using water based coolant, which was came with the machine. The vice itself was donated to the team by my father who had it sitting in my basement, we just haven't had time to polish it yet.

We'll defiantly give hsmworks a call and ask about the full edition, that would be awesome! Thanks for the lead!

-M

Ah, that makes a bit more sense.
Just don't do anything to abrasive to clean the rust, I have been told using something abrasive can mess with the squareness of the vice.

You guys also plan on getting the tool changer/power draw bar?

[ProgrammerMatt]

Originally Posted by Mk.32

Ah, that makes a bit more sense.
Just don't do anything to abrasive to clean the rust, I have been told using something abrasive can mess with the squareness of the vice.

You guys also plan on getting the tool changer/power draw bar?

yea, the power draw bar is next on our list then the tool changer,

[peronis]

Sorry to hijack this thread, but I am currently in the process of trying to secure funds through our district for a CNC machine for aluminum cutting. I am deciding to get a Tormach 1100, or go with a Shopbot buddy alpha.

I like the large build area of the shopbot, and that it could be used for wood as well. I got a quote with shipping for the shopbot for just under 17000 with shipping. Seems like the Tormach with a lot of extras would run the same or less.

I would love any advice on what machine would be a better use of funds for regular FIRST specific uses?


Thank you so much

[CENTURION]

Originally Posted by peronis

Sorry to hijack this thread, but I am currently in the process of trying to secure funds through our district for a CNC machine for aluminum cutting. I am deciding to get a Tormach 1100, or go with a Shopbot buddy alpha.

I like the large build area of the shopbot, and that it could be used for wood as well. I got a quote with shipping for the shopbot for just under 17000 with shipping. Seems like the Tormach with a lot of extras would run the same or less.

I would love any advice on what machine would be a better use of funds for regular FIRST specific uses?


Thank you so much

I haven't personally worked with either (working on getting a Tormach for our buildsite). But the Tormach 1100 is a very impressive machine, especially for how little it costs. It's got a lot of rigidity and power at it's disposal. I've been following a fella on youtube who uses his to make high-quality pocket knives. He mills titanium and exotic stainless steels no problem, and even hard milling. Not that those are things that you'll do in FRC much, but it speaks to the capability of the machine.

The only advantage I can see to the Shopbot would be the work area, but I think the PCNC 1100's work area is big enough to do just about any FRC part you can think of. The Shopbot might be a bit better for making some sheet metal parts, but I think having proper toolholders and the capabilities of a real mill are worth that tradeoff.

[peronis]

Thank you for the advice... I am really up in the air for the choice. I have seen many youtubes and examples of the products the Tormach can produce, and definitely is made for metal.

I know there are some teams out there that have to have a shopbot. I haven't seen many pictures or videos of aluminum done with them.

I think we will be focusing on using the machines for hole patterns, brackets, gussets, gearboxes, on aluminum plate (proly not much thicker than 1/4"), angle, and tube stock.

Thank you

[Cory]

Do you need to purchase a new machine? You can get a much better machine for the money if you can buy used.

[peronis]

I don't necessarily need a new machine, however I believe it will be easier for the school to approve and buy one from a company. In addition, a new machine would include support and additional resources if problems arise.

Do you have any experience with either machine?

[Cory]

Originally Posted by peronis

I don't necessarily need a new machine, however I believe it will be easier for the school to approve and buy one from a company. In addition, a new machine would include support and additional resources if problems arise.

Do you have any experience with either machine?

I've used the Tormach. If I had $17,000 to spend I'd find a used machine over buying one, but I understand the difficulty of the proposition of used machinery for a school purchase.

It's an OK machine, considering what it is. It's not going to be the most rigid, precise/accurate, or fastest machine ever, because it's too small, light, and cheap to be all those things, but you should easily be able to produce reasonably good parts to within .005". I do know that Team 368 had some fairly large quality issues with their machine a few years ago, but I think Tormach resolved the issues for them.

[Bald & Bearded]

So first I am jealous. That looks like a cool machine.

I also like the Vetric software - I use it with my Shopbot Handibot - It is simple and lets you quickly lay out most tool paths.

For the person looking to buy a machine, I saw the Buddy when I was down at Shopbots factory for training in Oct. It also looks like a great machine.
While I can't speak for the Buddy I do have a Handibot (Shopbots portable CNC machine) and the quality of their machines is top notch. I also really like that they are small, personable and so far have had great customer support. They let local FIRST teams come in and use there really big production machines.

[magnets]

I have been with 2 teams in the past few years, and the tormach experience has been... interesting. The first team had nothing but success with their machine, with the machine being run hour after hour cutting gearbox plates, wheels, sprockets, pulleys, and everything else with little to no problems. The team I'm with now, isn't too excited about the tormach. We assembled a do it yourself cnc router, and we really love the thing. We use it for prototyping all the time, and it's easy enough to use that a freshman was able to make a shooter wheel to launch frisbees by herself. Then, to cut thick aluminum and steel, we got a tormach. To begin with, the new one seemed a little more flimsy than the old one. (they were both PCNC 1100) While none of the axes or tables were flimsy, the back of the machine and all the little guards and panels were all wobbly. After setting up and cutting the first part (block with many holes), we noticed that the part was only accurate to about 1/2", so something was slipping. I wasn't involved much over the summer with this team, but the end result was paying $3000 to have a technician come out, replace the table, the motor, and the ballscrew, because the motor would make noise, but the output shaft wouldn't spin. Because the motor is modified by tormach with a different shaft output, if the problem fails in the modified part, you can't fix it yourself. However, the other two axis the motor worked fine, but the shaft coupling slipped on a both.

I've never used a shopbot very much, but i've heard great things about them. Also, consider used equipment if possible.

[peronis]

Originally Posted by magnets

I have been with 2 teams in the past few years, and the tormach experience has been... interesting. The first team had nothing but success with their machine, with the machine being run hour after hour cutting gearbox plates, wheels, sprockets, pulleys, and everything else with little to no problems. The team I'm with now, isn't too excited about the tormach. We assembled a do it yourself cnc router, and we really love the thing. We use it for prototyping all the time, and it's easy enough to use that a freshman was able to make a shooter wheel to launch frisbees by herself. Then, to cut thick aluminum and steel, we got a tormach. To begin with, the new one seemed a little more flimsy than the old one. (they were both PCNC 1100) While none of the axes or tables were flimsy, the back of the machine and all the little guards and panels were all wobbly. After setting up and cutting the first part (block with many holes), we noticed that the part was only accurate to about 1/2", so something was slipping. I wasn't involved much over the summer with this team, but the end result was paying $3000 to have a technician come out, replace the table, the motor, and the ballscrew, because the motor would make noise, but the output shaft wouldn't spin. Because the motor is modified by tormach with a different shaft output, if the problem fails in the modified part, you can't fix it yourself. However, the other two axis the motor worked fine, but the shaft coupling slipped on a both.

I've never used a shopbot very much, but i've heard great things about them. Also, consider used equipment if possible.

Thank you all so much for the feedback.

I noticed how you mentioned that you made sprockets, wheels, etc. with the tormach

I guess the question would be, can the shopbot do the same precision work, or has anyone made precision parts such as sprockets and gearbox parts on it?

[Alan Ing]

Originally Posted by Cory

It's an OK machine, considering what it is. It's not going to be the most rigid, precise/accurate, or fastest machine ever, because it's too small, light, and cheap to be all those things, but you should easily be able to produce reasonably good parts to within .005". I do know that Team 368 had some fairly large quality issues with their machine a few years ago, but I think Tormach resolved the issues for them.

Hi All, I'm an engineering mentor with Team 368 (We sat out last year but are back for 2014!). I thought I'd just make some comments regarding the Tormach.

I’m pretty much in agreement with what Cory said about the Tormach. It is not in the same class as a production machine and does not have the mass, rigidity, or power to be compared with machines from Haas, Hurco, Sharp and the numerous other industrial machines. It is however, a great little machine that may fill the needs of many FRC teams who are just getting started in cnc milling.

We bought our Tormach back in 2006 without any real knowledge about how to use it and have been relying on it more and more as the years go by. Accuracy is pretty good, we are usually within .001” and with some care you can get press fits for bearings. I would call the Tormach a proconsumer machine. It’s neither a cheap hobbyist mill nor an industrial machine. It has travels of 18” x 9.5” x 16.25” (xyz) which is not very large but large enough to do many parts that an FRC robot might need. One of the typical things we do is make 25 and 35 pitch sprockets with it. Although the travels are limited, with some creativeness, you can make larger parts by indexing. We cut a 240 tooth 25 pitch sprocket to make a turret that a lunacy ball could pass through back in 2009. There are many accessories including a power draw bar (more like a pneumatic collet closer) and a toolchanger which make it a mini milling center. It is not perfect, but has enabled us to make some pretty cool stuff.

Some things to consider, we have had excellent support from Tormach. As Cory mentioned, we had a quality issue with our mill, but after some discussions and troubleshooting, Tormach made everything right for us and we are happy with its resolution. I believe our problem was just dumb luck and would not hesitate to purchase another mill from them. If you need to know the specifics, you can pm me.

A used industrial cnc machine is a great way to go and you can get some good deals on machines. The only problem is that you should have someone who really know what they are doing prior to pulling the trigger. It is not as simple as plugging in a hobbyist rapid prototyping machine and you may need someone who can troubleshoot, operate, and maintain the machine.

When you buy a used machine, often you are on your own. The Tormach is well documented, has a lot of support and you can get started fairly easy.

Our team is now at the point where we could really take advantage of a larger more powerful machine, but we are constrained by money and space.

Oh, by the way, we use MasterCam, they have a great educational discount, but Tormach also sells affordable cam products too.

[sanddrag]

Originally Posted by Alan Ing

One of the typical things we do is make 25 and 35 pitch sprockets with it.

Hi Alan,
I'm sure you've told me before, but where are you getting your sprocket tooth profiles from? The models we used last season did not fit the chain accurately.

[R.C.]

Originally Posted by sanddrag

Hi Alan,
I'm sure you've told me before, but where are you getting your sprocket tooth profiles from? The models we used last season did not fit the chain accurately.

We use the mastercam sprocket generator. And then compensate tooth profile using wear comp, its normally not much. We've also haven't had an issue with the solidworks generator.

-RC