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Hey all, I am delighted to see this discussion as I am experiencing table top stability issues with my 96x60 PRT Alpha that is otherwise still going strong. I bought it used and always have to work...

Hello all. PRT with spindle from 2004 or thereabouts. It seems I have a sticky or weak contactor and I thought I saw somewhere in the message board that it is in series with the one directly above...

Thanks Steve. PRT Alpha 2004 vintage with 60 x 96 table. You are right. I changed my Z multiplier from 4 to 5 and that solved the X and Y. Doing it to the Z started that new problem so I set it...

Thanks. that seemed to work except now my Z is acting oddly. Like it is drifting deeper into the material as the cut progresses. It is not a slipping bit - I just confirmed that.

There must be a post here on this but I can't find it. It seems move unit values are different than jog unit values. I accidentally lost my file that set the unit values and other info and reset...

Would love to be there but I have a conflict. I know you will all have fun. . .
Cheers.
-Marcel

Thank you. I feel a little foolish missing that one.:o

Hi all. I just downloaded Aspire 4 and need to know how to find and add the right post processor. I see posts about "arc_inch_speed" and "*.sbp" but I am at a loss where to find them and where the...

Thank you, all.

I based my set-up on forum posts that I understood to be similar to what I was doing. I understand the sneak up on the feeds and speeds concept. I did take pictures up close and...

Greetings all. I just tried my first aluminum project. It roughly a 10" long x 3/4" wide control lever in 6061-T6 .125 thick with a row of adjustment holes. I fitted a new Onsrud single O 1/8"...

Okay -- all is good. I now realize I had the same issue the first time I set up the machine way back when. Now I need to better understand how the spindle and VFD work. I will play/experiment some...

I set to Jog 10 inches and my machine goes 12.5". When I Move 10 it goes 10. I searched here for a solution but have not found it. I only see one place for unit values to be set. If I set move...

I replaced the Serial-USB adapter and everything seems to be in order. Have not had a chance to run full testing but good so far.
-m

Cable is about 4'. No hub - this is something new to me with regard to SBs. I have one in a box somewhere from a few years ago for another reason but I will dig it out and see if I can make it work...

Okay, I discovered the following extensive discussion relating to the COMM and USB thing and I think I fall into the category of trying to get off cheap with older equipment to run the PRT.
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Newer user with Alpha PRT 60 x 96 from about 2006 purchased used 18 months ago. It ran nicely on my old Alienware laptop. Then the SB was stored for a year during which time the Alienware died. ...

I can pull together a presentation of the boat I am building if you still have time to fill. There is not much direct ShopBot content on this project but for future projects it will be the main...

I have the date saved and plan to make it.
Marcel in Duluth.

I bought a used machine that worked well for the few projects I did until some life changes left the machine idle for a year. It was then moved to a new location with a new PC and I have the very...

I am interested. Duluth MN.
Thanks.

I have discovered a VU (Units Value) issue that has me perplexed. The PRTalpha 9660 I recently bought seemed to have inaccurate movement so I played with the VU number to dial it in. After crashing...