Search found 609 matches

by slodat
Wed Feb 24, 2021 6:37 pm
Forum: Centroid Acorn CNC Controller
Topic: Is an oscilloscope necessary?
Replies: 10
Views: 116

Re: Is an oscilloscope necessary?

When I was chasing down issues with DYN4 drives on my CNC router an oscilloscope was the only way to finally get down to what my problem was.
by slodat
Sat Feb 20, 2021 11:46 pm
Forum: Centroid Acorn CNC Controller
Topic: DMM DYN4 servo moves x+ correctly but x- move off
Replies: 8
Views: 181

Re: DMM DYN4 servo moves x+ correctly but x- move off

It’s easy to determine if you are losing steps... Note encoder counts in DMMRV Move the axis around via MDI Move axis back to start position and note encoder counts. If they aren’t very near the same. If you are losing steps, use the DB25 step/direction outputs. I’ve documented this well if you want...
by slodat
Thu Feb 18, 2021 10:23 pm
Forum: Centroid Acorn CNC Controller
Topic: Acorn + Clearpath success stories?
Replies: 37
Views: 1344

Re: Acorn + Clearpath success stories?

Tom - then why not use the 5v DB25 step/direction outputs on Acorn?
by slodat
Mon Feb 15, 2021 8:52 pm
Forum: Centroid Acorn CNC Controller
Topic: Ameritech Slant-30 CNC Lathe Conversion <Build Thread>
Replies: 9
Views: 193

Re: Ameritech Slant-30 CNC Lathe Conversion <Build Thread>

Brian - post photos of the vfd you currently have running the spindle motor.
by slodat
Mon Feb 01, 2021 9:47 pm
Forum: Centroid Acorn CNC Controller
Topic: DMM DYN4 servo moves x+ correctly but x- move off
Replies: 8
Views: 181

Re: DMM DYN4 servo moves x+ correctly but x- move off

sounds like backlash. Have you measured backlash?
by slodat
Mon Feb 01, 2021 10:36 am
Forum: Centroid Oak, Allin1DC, MPU11 and Legacy products
Topic: Mazak Impulse - Oak retrofit build log
Replies: 17
Views: 321

Re: Mazak Impulse - Oak retrofit build log

Excellent work on the encoder adapter board! Excited to see your machine come together!
by slodat
Sun Jan 31, 2021 3:57 pm
Forum: Centroid Oak, Allin1DC, MPU11 and Legacy products
Topic: My Centroid Conversion (Fadal VMC4020)
Replies: 8
Views: 300

Re: My Centroid Conversion

What is the keyboard you are using? Link?

Looking good!
by slodat
Fri Jan 29, 2021 1:04 pm
Forum: Centroid Acorn CNC Controller
Topic: Vacuum pump with VFD for a single-phase power supply
Replies: 8
Views: 198

Re: Vacuum pump with VFD for a single-phase power supply

Those cheap Chinese VFD's are a bit of a crapshoot in my experience. Personally, I want to rely on my equipment and go with better quality. I do have a HY "10hp" I keep around for testing motors and such.
by slodat
Fri Jan 29, 2021 11:53 am
Forum: Centroid Acorn CNC Controller
Topic: Vacuum pump with VFD for a single-phase power supply
Replies: 8
Views: 198

Re: Vacuum pump with VFD for a single-phase power supply

The horsepower rating of the vfd is not what matters. The VFD needs to be able to deliver the full load current rating of the load.
by slodat
Fri Jan 29, 2021 11:48 am
Forum: Centroid Acorn CNC Controller
Topic: Vacuum pump with VFD for a single-phase power supply
Replies: 8
Views: 198

Re: Vacuum pump with VFD for a single-phase power supply

Hitachi rates their new SJ-P1 VFD's for single phase supply up to 105a on the three phase side. I'm using one on a 30a spindle motor and it works quite well. In the case of the vacuum motor, I too would use an RPC. I'm currently installing an American Rotary 20hp RPC to power my 15hp lathe. I'm blo...