[legendboy]

This thread is a retrofit retrofit

I am changing out my old DC brush motors and granite vsd-xe drives for dmm
I will post lots of pictures starting with mounting the 86M-DHT-72 motors to my series 1 Bridgeport
This is the biggest obstacle.

First thing is I don't have a mill. Used my lathe to make 3 adapter plates. Roughed them out

[legendboy]

this is what they look like


my dag came for a visit


punch it and bore rinse and repeat 3x

[legendboy]

drill and tap

[legendboy]

Next up is shaft extensions. Drill, bore, ream

Attachment 253002

This is my x axis

[boss4]

I am planning to do the same upgrade and I am curious how you like it now that its in use?

Also how did you put a keyway inside the blind shaft adapter?

Finally where did you buy the DMM servo's and drives?

[mactec54]

I am planning to do the same upgrade and I am curious how you like it now that its in use?

Also how did you put a keyway inside the blind shaft adapter?

Finally where did you buy the DMM servo's and drives?

Here are some that I did, you can bore right through, & then Broach it just Half the normal key depth, or you a slotter to cut the blind keyway, ( 3 ) different ways I have made them the first is a little more work, but works very well, the third one is making the timing pulley & mounting all in one, this one was for the Z axes changing the ratio to 2:1

You can get the Servo's & Drives from Dmm
DMM Technology Corp. | Home

[seapacer2]

Good Morning Mastec 54,

I'm converting my Bridgeport from my old Anilam and going to utilize the DMM 750K, Nema motors and drives, I also will have to extend my servo shaft length, do you have drawing on the half extension? Also where did you get your taper lock timing pulleys?

Thanks,

[mactec54]

Good Morning Mastec 54,

I'm converting my Bridgeport from my old Anilam and going to utilize the DMM 750K, Nema motors and drives, I also will have to extend my servo shaft length, do you have drawing on the half extension? Also where did you get your taper lock timing pulleys?

Thanks,

You should start a new thread as this is very old thread

What Bridgeport model machine do you have the extension is not needed on all conversions, also an offset timing pulley will also work for some models, they don't have a taper lock but makes it easy to fit, this company is quite good for Timing Pulleys

https://www.brecoflex.com/products/p...gn-guidelines/

[boss4]

I used these same servos to convert my Bridgeport CNC ~5 years ago. Still going strong and they work great.

Misumi sells pullies with a large boss that will work with nearly no modifications to the mill. The only modification I remember is that for the Z axis I did need to take a little bit of material off the inside of the mount to create clearance for the boss. I did this with a die grinder. I went witth the smallest pulleys avaailable (IIRC they are 14 tooth) for all 3 axis's. I then ordered new belts to suit these pulleys and set the "gear ratio" in the drive such that all 3 axis's had the same steps per inch of travel. I did also need to make adapter plates (nmea 42-34), but I think these can also be purchased on ebay. There is no encumberment on the X and Y plates but the Z axis adapter plate needs to be as thin as possible. I made it out of .25" steel plate You could certainly also just drill and tap the cast iron and directly attached the motor to the mill without an adapter plate. Also Though I used 1 inch pulleys for all 3. IIRC you can use a .75" pulley for Z since it actually has a .75in belt (this is probably mill specific).

If you have a lathe, you could also buy a length of timing pulley stock (also available from misumi) and make pullies in any shape you desire. I think that this would actually have been more expensive than simply buying the pullies whch is why I didint do it.

This is the part I used: ATPN14H100-B-N14 from here: https://us.misumi-ec.com/vona2/detai...PN14H100-B-N14

Other parts are certainly available that will also work.

Good Morning Mastec 54,

I'm converting my Bridgeport from my old Anilam and going to utilize the DMM 750K, Nema motors and drives, I also will have to extend my servo shaft length, do you have drawing on the half extension? Also where did you get your taper lock timing pulleys?

Thanks,

[Bl@ckrat]

looks great !

is the pulley side supported on a bearing ?

[legendboy]

Hey Bl@ckrat,

No they are not supported on the outboard side. I don't think they need to be.
The shaft extensions I made use the full length of the servo motor shaft. The bore is reamed 14mm and there is no detectable play between the shaft and the coupler.
The set screws sit down inside the 5mm key slot on each end. This holds the shaft captive. Blue locktite on the set screws. The female part of the coupler is 1"OD and the shaft extension is .625"
Should be pretty stout.



Here is what they look like installed





VSD drives and BOB coming out (as well as the dc power supplies)



I really really wish I had kept the large control cabinet that was on the back of my Bridgeport instead of the smaller side cabinet.
Anyways this is what it looks like after removing stuff




I am not too sure if I am going to use the DMB4250-8B breakout board. I have one but I don't need to use it.
Eding cnc IO is open collector.

My new 60vdc ps have 8200uf caps on each one, is this enough filtering for the DYN2 drives?

[mactec54]

My new 60vdc ps have 8200uf caps on each one, is this enough filtering for the DYN2 drives?

That should work well, with there Drives

[legendboy]

Hey Mac thanks for the confirmation

[boss4]

Is there a package deal with Drives + motors + encoders?

I am planning on using 86M-DHT-72 motors with DYN2 drives.

I emailed DMM for a quote; they don't make it too easy for window shoppers.

Certainly great work mactec.

I don't presently have a functional lathe's so I will probably try to use off the shelf smooth bore pulleys so that all I have to do is drill and ream the centers which I can do on the mill and then broach the keyways.

[legendboy]

Is this the tuning cable? I am pretty sure it is, just want to make sure

[mactec54]

Is this the tuning cable? I am pretty sure it is, just want to make sure

Yes that looks like it is for the Drive setup, having the RS232 plug on one end, it would have any other use, for their system, other than tuning, the Tuning connection & software is the same as with the first series of the Dyn 2 Drives

I just received some test motors Drives of this new series, the motors & New DYN 2, quality & design is an amazing step forward

[G59]

where are these motors from? Who makes them?

[legendboy]

DMM Technology Corp. | Home

I am using the 86M-DHT-72 ac motors

[woffler]

You will need the parallel port plugin to run Mach 4 as the DMM breakout board still uses it ,the cost is extra and is 25.00 so it will cost 225.00 to use Mach 4.

Until Dmm comes up with a different B/O board with say a usb or ethernet com. port , there is a real limiting factor with the B/O board not enough I/O for any thing other than a basic system.

I have several systems running mill and lathe with up to 8 motors and the break out board has always been a limiting factor.

[legendboy]

Here are some pictures of my wiring. Not exactly a work of art but everything is working. I am going to change out some relays for ssr's this week.
I will post a video soon of the machine running.

The DMM motor/drive combos work amazing. I am seriously impressed. No messing around with tuning, just set the drive parameters on how you want the motors to behave and your done.



Connections between eding cnc and the new dyn2 drives