Dynomax Spindle Blog

In some applications it can be of vital importance to stop a spindle very quickly.  For some operators, safety is the main concern; for others it’s helping to reduce cycle time.  In any case there are industry proven methods to stopping a spindle in seconds…or less.

In all cases, a variable frequency drive (VFD) must be used.  To stop a spindle’s rotation the VFD converts physical energy into electrical energy and dissipates it through built in resistors.  To accomplish this the VFD takes large increases in load.  If the VFD was not sized properly for the spindle it is driving the drive could trip, which would allow the spindle to rotate freely.  To avoid this problem, engineers must provide a VFD that is much larger (and more expensive) that what will be normally required.

A better solution does exist and it involves the use of a braking package.  Normally including a brake chopper and a brake resistor, the braking package works in tandem with a properly sized VFD to dissipate unwanted energy and stop the spindle as quickly as possible.  In this configuration, the spindle’s rotational energy is “chopped up” into more easily digestible amounts that are then dissipated through the brake resistors.  For example, a 1 HP spindle running at 15,000 rpm with a VFD and braking package can be completely stopped in less than 1 second.  For more detailed information, please contact a Dynomax engineer.

Knowing how much power is required to perform a machining operation is useful when planning new machining operations, or for optimizing existing machining operations.  It is also vital information to have when properly selecting a spindle.  The available power on any machine tool spindle limits the size of the cut it can take.  When large amounts of metal must be removed from a work piece, it is advisable to estimate the cutting conditions that will utilize the maximum power from the machine.  Some machining operations will require only light cuts for which the machine obviously has enough power; in these cases estimating the power required may not as necessary for success.

Whenever possible the maximum power available on a machine tool should be use when heavy cuts must be taken.  The cutting conditions for utilizing the maximum power should be selected in the following order:

1) Select the maximum depth of cut that can be used;

2) Select the maximum feed rate that can be used;

3) Estimate the cutting speed that will utilize the maximum power available on the machine.

This sequence is based on obtaining the longest tool life of the cutting tool and at the same time obtaining as much production as possible from the machine.  The life of a cutting tool is most affected by the cutting speed then by the feed rate, and least of all by the depth of cut. The maximum metal removal rate that a given machine is capable of machining from a given material is used as the basis for estimating the cutting speed that will utilize all the power available on the machine.

Dynomax, the industry leader at producing the highest quality spindles on the market, has released a brand new website at dynospindles.com. We have incorporated all new features to make finding the right spindle for your job easier than ever before!

Spindle Creator - our brand new interactive RFQ system that allows you to spec out spindles any way you need them. No more database searching to find what you need… just go ahead and tell us what you want, we will get back to you within 24 Hours Guaranteed.

Web Specials - An easy to find place at dynospindles.com, where we have: New Releases, Popular Products, and Great Web Specials!

As always Dynomax is ready to help service other spindle brands that you have in operation:

Spindle Brands Repaired and Serviced - Dynomax services hundreds of diffrent types of spindle brands. This is a easy to follow guide to find out if we repair your spindles. If you can’t find your’s, just give us a call

Our Process - Find out just how Dynomax goes about repairing your spindles! From start to finish we show you what goes on at our Multiple facilities!s

So go Check It Out!!! http://www.dynospindles.com

We look forward to talking with you, and we hope you like the new site!

Sincerely,
The Dynomax Team.

P.S. Need to talk to us? Everyone Loves Paul, email him at pflanagan@dynospindles.com or call 847.680.8833 to speak to a Dynomax Representative!