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Agreed!

Doing a conversion on a Bridgeport/knee mill will cost at least $6000 for new components. Price out how much a new CNC knee mill costs, you will find that it will be over $15K. Now add up...

Hi DonW,

I have a G100 that is not being used and willing to part with. If your interested PM me.

Most 60Hz motors can run at 120Hz without issue. I am sure the 50Hz motor you have is rated for 60Hz as well. The bearings will not be the limiting factor, but maybe the gearbox will.

Billhill,

Got to hthe Kennametal site and look for their horsepower and force calculator.

widgitmaster,

You can use a break if you need sharp bends. Otherwise if the part is small enough you can put in an oven to heat it up enough and then use a pipe or some other round surface to bend...

Hood,

WOW!!! That was fast. Have you ever thought of going into customer support :).

:cheers:

Hood,

I have some AB Ultra 100 drives I am working on and I can communicate to them with DSMpro. The problem is I need to make a custom motor file and DSMpro does not have this feature. I need to...

Mike,

Most motors have a fan attached to the rotor's shaft. If your motor/fan setup is like this you might want to get a stick on thermometer to monitor the temp. If the motor's fan is driven...

Mike,

Not sure what you want your maximum RPM to be, but I think you might want to change the reduction ratio a little so you do not overheat the motor at low RPM. Most 4 pole motors (1750 RPM at...

Mike,

Using a vector drive to control your mill's spindle would be a solution for speed control. You are right that it maintains torque even 0 rpm, but don't forget that it takes power to move...

Go to the Kennametal site and look under technical support for their HP calculator. This should give you the load info you are looking for.

Guys,

CNCing the knee is not difficult. I have done a few and I have found that there is a common approach to getting it done. Two critical areas that always seem to be over looked is the weight...

Henrik,

Do you plan to attempt to get the Mammut drive running?

I ask because I am looking for feedback about this drive due to some the specifications they quote for it. Mainly the max step...

Henrik,

Can you expand on your experiences with the Mammut drive?

Thanks,

Trevor

Gareth,

What quantities are you looking for and how often?

Thanks,

Trevor

What are your motor tunning srceen settings for all axis? Post everything you see on the screen.
Also you might want to check if your drives require an active HI or an active LOW for step pulses.

If your LookAhead is still at the default (20) increase it to about 200. Reset your accel and steps/unit values back to what started with.

This should help.:)

Thats the problem. You can't use a regulator.:D

The air assist basically acts as a counter wieght but without adding mass to the machine.

The ballsrcew for the knee is the same size screw that is used on any other axis of the machine.

As...

Scott,

Currently I use a normal lube pump on the knee. It supplies all the ways and screws with lube.

I do have plans to upgrade to an auto oiler.

Guys,

Your looking at a video of my machine doing a peck drill cycle. Currently the max rapid rate is 135ipm but I have plans to increase this to 500ipm:).

You might want to consider a ballscrew for the driven knee. It will help with travel speeds and allow you to use a servo with less power. I woouldn't worry about wear too much as long as you use a...

PJet,

Not sure what skill level you have with regard to welding, but if I was doing small batches I would use TIG. Unless the small batches have long weld lengths and you have a short...

balibalistic,

There should be a large hex nut on top of the spindle step pulley, and a smaller hex nut above that. Use a large adjustable on the larger hex nut to hold the spindle steady, and a...

You might want to check with Tom at Dynamotion about this. I have given him an example file to check the blocks/sec capacity of the KFlop/KMotion plugin.
Besides, 500 blocks/sec will only slow you...

I have a few emails from the KMotion guys. Their cards are well suited to analog drives and they have a plugin for Mach3. My thoughts were that the KMoition would be a great replacement of multiple...

Anyone have experience with Ac Tech or Leeson VFD's and their braking modules? My understanding is that their VFD's require brake modules in order to do dynamic braking. Don’t most VFD's require...

Guldberg,

Do a search for salnt bed lathes to see what machine manufacturers think is good design. You might find some ideas that may help your build. Keep up the good work.:)

Eloid,

Goto geckodrive.com, you can order them directly form thier site. Also you might want to checkout the Yahoo group for more information.
Not sure if you are looking at steppers or...

robhrzic,

Constant torque would be the way to go, especially if you want to do tapping. Torque changes with speed/frequency on a variable torque unit.

As for your motor you should be able to...