HTC-400 Removing table

[Volitan]

I know there's a couple guys here who have worked on these machines, and in other threads we talked about how to get the pallets off - but has anyone removed the table before?

I mean that part the pallet sits on, that rotates and gets clamped down.

We have a hydraulic leak under ours (not the first time, but I didn't fix it last time), so I'll be digging into it soon and was wondering about any 'gotchas' etc? Anyone have any hands on experience doing this? I have the parts list and exploded diagram etc..

Thanks

[landm1]

Hello,

I have posted few times about my HTC400 but I have never had to remove the pallet. Be sure and post what you come up with. I think when you punch the "pallet unclamp" with the pallet out of the pallet change area I am pretty sure it is free and clear but that would be a real bad place to remove it unless you use a lift.
I was thinking in the load station remove the block with the bearing on it that keeps it in place while you load it.
But thinking again, perhaps you have to remove the covers on the changer and remove a couple of he big disks that hold the pallet in palet in place but without something supporting the pallet.
Sorry I could not be of more help, I would like to be able to clean better under the pallet some day, I am sure there is an easy way to do it but these machines are unique, very different than all the other Mazak Horizontals.

Good luck!

LandM-1

[Leelund]

Index or NC table? What control do you have?

[Volitan]

landm1 - Here's a thread where removing the pallet was discussed: http://www.practicalmachinist.com/vb...d.php?t=175360

I'm talking about the table that the pallet actually sits on though.


Leelund - It's an indexing table (1 degree), and it's a Mazatrol M-Plus control.

[Debco Machinery]

I did this few years back (same problem) had to replace the seals in the clamping cylinder.
As I recall it was a pretty big job, no problems except with the arm and spring that controls the detection of the clamp prox switch.
It is very tight in there and had to really work at getting your hand under it.

I will be with the fellow that did the job with me in the morning and you could call if you want and I will ask him if he remembers any details or warnings

[Volitan]

Thanks! I may take you up on that. I won't be able to get started until tomorrow at the earliest.

In the meantime I've looked over the drawings a few different times when I've had a minute.

[Debco Machinery]

I can be reached at (cell) in fact I will be at the same customer we did the job for in the morning.

Dave

[Volitan]

Originally Posted by Debco Machinery

I can be reached at (cell) in fact I will be at the same customer we did the job for in the morning.

Dave

Thanks again, that's very generous of you. I'll definitely call you in the morning.

You might want to edit your cell number out of that post though, Google sometimes picks up forum threads while searching, who knows what kind of phone calls you may get.

[Volitan]

Originally Posted by landm1

I was thinking in the load station remove the block with the bearing on it that keeps it in place while you load it.

I would like to do it this way too. But does anyone know what happens when the machine doesn't see the pallet clamped to the table like it's supposed to? An alarm that I have to overide maybe? Will I still be able to jog the table?

[Debco Machinery]

Originally Posted by Volitan

I would like to do it this way too. But does anyone know what happens when the machine doesn't see the pallet clamped to the table like it's supposed to? An alarm that I have to overide maybe? Will I still be able to jog the table?

The table will still jog

Dave

[Volitan]

Dave - I just wanted to take a minute and thank you again for your kind offer of a phone call, I haven't called because I got hit with a last minute rush job and haven't been able to get to the Mazak yet (every time I say that I'll definitely do something, something else comes up...)

I plan on taking pictures along the way too, maybe that will help the next person here that has to do it. There's so few of us Mazak HTC people we need to stick together

[Debco Machinery]

Thought you would have it done by now (kidding)
Today I repaired the shifter on a FH-4000 and Monday doing a rebuild of a live milling head on a SQT. I thought about taking pictures so as to pass them on.

I do about one live spindle a month, can do them blindfolded (sad eh) lol

Regards

[Debco Machinery]

Talked with my partner today and reviewed what we did.
The problem was a hose leaking under the table, we think it was rubbing and if memory serves me it was a very short hose.
When you are pulling the table off make sure you reach under and disconnect the arm for the prox switch otherwise you will bend it out of shape.
This unit was not built to be easily repaired as you will find out.

[Volitan]

Awesome, thank you. I can't believe I haven't gotten to it yet.

[Volitan]

Originally Posted by landm1

I would like to be able to clean better under the pallet some day, I am sure there is an easy way to do it but these machines are unique, very different than all the other Mazak Horizontals.

Good luck!

LandM-1

I thought of you Saturday when I took the pallet off, and snapped a quick cellphone picture. Here's the table with no pallet, that piece in the middle with bolts holding it down is the clamp. It has lips milled in the front and back (can't see it in the picture though - it's like an upside-down t-nut). When the pallet swings into place, it has ledges underneath that go under those lips, then that clamp goes down and holds it in those perches. That's why you can't lift the pallet straight up on the machine side. I suppose you could slide it off the table if you had a lift but I can't think of a reason why.

I unbolted the block and removed the pallet from the operator load side like you mentioned. Then I put it back and called for a pallet change. I had the forklift there, but I also had a wagon where the height was about the same so I slid the pallet out and onto the cart. I'd say it weighs about the same as 2 6" Kurts.

I haven't gone any further yet but I'll take pictures when I do.