Marchant Dice router no thrust bearings?

**gavztheouch** · 15-01-2013

Just HOPE people looking to buy see this thread and... not buy mine

(When I flog it to buy something else.)

Actually do you think I have any rights to make them take the machine back and give me a refund.

Looking back through my emails the invoice is dated 6th of Jan but I didn't recieve the machine until Feb. So I have had the machine for less than a year.

**JAZZCNC** · 15-01-2013

Originally Posted by gavztheouch

Actually do you think I have any rights to make them take the machine back and give me a refund.

Looking back through my emails the invoice is dated 6th of Jan but I didn't recieve the machine until Feb. So I have had the machine for less than a year.

Not really after nearly a year.!! . . . . Thou you could contact him and say how upset you are about the disgusting quality of build and see what he says or his prepared to do help ease the pain.?

**Shinobiwan** · 16-01-2013

These make Strikes attempt look passable!

Marchant Dice? More like Rip Off Marchant. C$£ts!

If you don't mind me asking how much did they charge for that? I'm guessing about £2000?

**m.marino** · 15-01-2013

I could put you in contact with a few advocates but you would have to move quickly due to the time issue. Though the fit for purpose (FFP) issue might be different up here in Scotland and you might wish to look into it. personally I sold mine as is and documented the limitations to the buyer (that way I am being honest to the next guy down the line). There is no way, given an machinist and industrial engineer's opinion in court that they would win on a FFP case. Not on their smaller hobby units, that I was told would have no problem handling acrylic and hard woods.

Michaael

**gavztheouch** · 16-01-2013

Close to £2000 yeah.

I think the complete system was £4000 for the extra £2000 you get a shite pc with mach and three stepper drivers.

**JAZZCNC** · 16-01-2013

Originally Posted by gavztheouch

Close to £2000 yeah.

How F@~$ing much. . . .and you didn't even get drives.? . . . .What did you get for nearly 2K.

Working on those prices the machine I made for Micheal would be £30,000. . .

**gavztheouch** · 16-01-2013

Everything in the pictures including the motors. No electronics.

**m_c** · 16-01-2013

I'mnot wanting to defend Marchant's machines, but press fit works fine if done right. There are far more critical machines relying solely on pressfit to keep things together.

As for the lack of thrust bearings, I've got a lathe that would of cost far more than a few thousand in todays money that relies on the stepper motor bearings to hold ballscrews in place. It's not ideal, and most likely will have an effect on longitivity, but it works.

I am wanting to upgrade my lathe, but it's still currently rattling out lots of parts bang on size without any issues.

**JAZZCNC** · 16-01-2013

Originally Posted by m_c

I'mnot wanting to defend Marchant's machines, but press fit works fine if done right. There are far more critical machines relying solely on pressfit to keep things together.

Think you'll be hard pressed to any commercial or even serious Hobby CNC machine that press fit Ballnuts or run ballscrews without some form of end fixing.?? . . . It's Bad practice pure and simple and proper manufacturer wouldn't do it.!

**m_c** · 16-01-2013

Originally Posted by JAZZCNC

Think you'll be hard pressed to any commercial or even serious Hobby CNC machine that press fit Ballnuts or run ballscrews without some form of end fixing.?? . . . It's Bad practice pure and simple and proper manufacturer wouldn't do it.!

I wasn't actually meaning specifically CNC machines! I was thinking about any machinary in general.
The fact is though, in this particular application, I doubt the steppers/ballscrews will generate enough force to move the ballnuts in the extrusion. It's quite smart, in that it does the job while reducing parts count and the amount of machining needed. Maybe not the ideal way to do it, but perfectly functionable.
Large CNC machine builders won't do it because of serviceability. Pressing something into something easily handled is a bit different from something pressfitted into a lump of iron weighing several hundred kg. There's also the manufacturing issue. A few tapped holes, with a locating boss is easier than a single tight tolerance pressfit.

I'm not defending MD though, especially given the prices. I'm just saying the methods used are maybe not ideal, but they're still perfectly functional.