My PM-940 CNC Modifications

[cut2cut]

Thanks for the pictures. Looks like you have eliminated the spindle drive sleeve with your setup and "locked" it in position. I'm still using the drive sleeve because I need about an inch of spindle travel to actuate my tool changer. Guess I'll have to live with the spline noise.

Not my mill but the configuration is the same.
View attachment 257253

That looks nice. Yeah, if I wanted the quill action, I'd have used this method and not locked down the quill movement. Does it allow the use of a power draw bar ?

 

[phazertwo]

Hey Jake, I don't suppose you could get the shaft dimensions off the old motor? I picture would be great too.

Thanks!
PZ

 

[cut2cut]

Hey Jake, I don't suppose you could get the shaft dimensions off the old motor? I picture would be great too.

Thanks!
PZ

Shaft diameter is 24mm.
Shaft length is roughly 45mm
Roughly 166mm between holes ( very rough +- 3mm ) no time to check further right now
200 OD of motor plate
130mm inner OD of motor plate ( ridge )

 

[phazertwo]

Awesome, thanks!

I think I'm going to give it a shot with the factory motor!

PZ

 

[TomS]

That looks nice. Yeah, if I wanted the quill action, I'd have used this method and not locked down the quill movement. Does it allow the use of a power draw bar ?

Yes, you can use a PDB with my setup. I have a Ultron Snap Change manual quick change tooling system on mine. Nearly as fast as a PDB.

 

[cut2cut]

Doug, I totally forgot to post these pictures of the transmission cavity. Here they are. Sorry for the delay !

( the red 3d printed thing is to drive a belt to my spindle encoder )

 

[pburgh]

Thanks Jake,
No problem, I was wrestling with my lathe all weekend, so I haven't done much with the mill. Is the collar with the phillips head screws below the spindle pulley where the spindle sleeve sits that has the small gear (33) attached? Also, do I understand correctly that TomS' pic about can use the quill feature?

Regards,
Doug

 

[TomS]

Thanks Jake,
No problem, I was wrestling with my lathe all weekend, so I haven't done much with the mill. Is the collar with the phillips head screws below the spindle pulley where the spindle sleeve sits that has the small gear (33) attached? Also, do I understand correctly that TomS' pic about can use the quill feature?

Regards,
Doug

Yes, with my belt drive conversion setup I have about 1" to 1-1/2" of quill travel.

 

[phazertwo]

Hey Jake, anyway you could snap a picture of the name plate off your motor... The way mine is mounted it's hard to read.

Also, do you know what the gear ratio was for high or low?

Thanks
PZ

 

[cut2cut]

Hey Jake, anyway you could snap a picture of the name plate off your motor... The way mine is mounted it's hard to read.

Also, do you know what the gear ratio was for high or low?

Thanks
PZ