Search found 218 matches

by Bob D.
Fri Nov 08, 2019 9:48 am
Forum: General Discussion
Topic: Need to broach a square hole...
Replies: 7
Views: 408

Re: Need to broach a square hole...

Layout your square hole. Drill out the corners with say a 1/8 drill. Put in the lathe, drill/bore 3/4” center hole. Use the lathe as a shaper to broach out the remaining indexing the chuck 90 deg. with a HSS tool. Finish up with some filing.
by Bob D.
Mon Oct 28, 2019 10:48 pm
Forum: General Discussion
Topic: Mobile Base for a 3 in 1 lathe mill
Replies: 5
Views: 964

Re: Mobile Base for a 3 in 1 lathe mill

Go for three point contact on the floor and it will never teeter. Might want to consider a lock down foot for between the swivel casters. Brings them slightly off the floor, establishes three point contact and does a better job locking the base down than most casters with brakes. Mount the fixed whe...
by Bob D.
Wed Oct 02, 2019 9:05 am
Forum: Riding Scale Railroading
Topic: 0-6-0 diesel yard switcher
Replies: 11
Views: 1774

Re: 0-6-0 diesel yard switcher

Lateral play in the axles. Blind center drivers if the overall wheelbase is large. It is the distance between the outer axle centers that determines the radius limit for the most part.
by Bob D.
Thu Jan 17, 2019 8:09 am
Forum: Riding Scale Railroading
Topic: 8hp vs 16 hp
Replies: 25
Views: 6736

Re: 8hp vs 16 hp

Those motors sure aren't happy with no air filters....
by Bob D.
Fri Jan 11, 2019 11:07 am
Forum: Riding Scale Railroading
Topic: Dimension Engineering controller question
Replies: 34
Views: 8011

Re: Dimension Engineering controller question

Mike,
You have it correct. Stripe on diode is the cathode.
You have a great railroad. Have followed yoour posts about it.

Bob
by Bob D.
Thu Jan 10, 2019 12:12 pm
Forum: Riding Scale Railroading
Topic: Dimension Engineering controller question
Replies: 34
Views: 8011

Re: Dimension Engineering controller question

Thanks for the detailed reply Mike. It clears up questions on the panel operation. Especially why there are ten positions of the throttle. I'm going to use throttle stop as one of the E-stops. Idle will be notch one and nine will be warp drive engagement...... Here's a sideview of my FrankenCritter....
by Bob D.
Wed Jan 09, 2019 11:48 pm
Forum: Riding Scale Railroading
Topic: Dimension Engineering controller question
Replies: 34
Views: 8011

Re: Dimension Engineering controller question

Mike, Question on the operation of the EMD panel. When the throttle is in notch one you can pull it out and go one lower into what I believe is the engine off/shutdown position. If that assumption is correct, is it normal that you have to go back to notch one to be able to remove the reverser lever?...
by Bob D.
Wed Jan 09, 2019 12:01 pm
Forum: Riding Scale Railroading
Topic: Dimension Engineering controller question
Replies: 34
Views: 8011

Re: Dimension Engineering controller question

After conversations with Dimension I have found that the Sabertooth 2x60 does not support analog option 3 like their other controls. This poses some problems for what I want to do, especially the lack of a one direction throttle and the ability to seperately choose forward or reverse. Using an Ardui...
by Bob D.
Wed Jan 02, 2019 9:13 am
Forum: Riding Scale Railroading
Topic: Dimension Engineering controller question
Replies: 34
Views: 8011

Re: Dimension Engineering controller question

Mike,
Looks good and should work as you want. Another thing to consider. If you want to safely freewheel the loco with the controller not powered up you can place a diode across the controller power switch to sink the regen power to the battery to prevent controller damage.
by Bob D.
Mon Dec 31, 2018 11:07 pm
Forum: Riding Scale Railroading
Topic: Dimension Engineering controller question
Replies: 34
Views: 8011

Re: Dimension Engineering controller question

CP, I don't think you can fry one of these miswiring the controller inputs. Hopefully no metal chips floating about from drilling.... Split sec oops on battery polarity is typical poof. Wire hairs crossing lugs.....
Where you running when it died?
by Bob D.
Mon Dec 31, 2018 4:40 pm
Forum: Riding Scale Railroading
Topic: Dimension Engineering controller question
Replies: 34
Views: 8011

Re: Dimension Engineering controller question

You can use the same switch. Wiring may need to be changed. A signal on S1 of 0v corresponds to the motor being fully stopped. 5v corresponds to full power. A second signal is fed to S2. If the signal on S2 is greater than 2.5 volts, the SyRen will drive the motor forward. If the signal on S2 is les...
by Bob D.
Mon Dec 31, 2018 4:11 pm
Forum: Riding Scale Railroading
Topic: Dimension Engineering controller question
Replies: 34
Views: 8011

Re: Dimension Engineering controller question

Mike, Do you have your controller dip switches set for option 3, analog one dir throt, for/rev S2 input? That uses Ov as motor stop. I would think this is fairly good failsafe. There is no mention of this option on my Sabretooth 2x60. I don't know if it is an omission or not supported. Bob