Search found 68 matches

by DavidB
Tue 02 Jul , 2019 21:55 pm
Forum: Novamill
Topic: My Novamill won't run
Replies: 35
Views: 256

Re: My Novamill won't run

Tony, Good to hear you're getting somewhere with suitable fuses, hopefully when all are replaced with appropriate ones all will be good. A few comments about TDIPower's comments the abbrevations DTE=DataTerminalEquipment, DCE=DataCommunicationsEquipment. These have caused issues for decades as a PC ...
by DavidB
Sun 30 Jun , 2019 23:38 pm
Forum: Novamill
Topic: My Novamill won't run
Replies: 35
Views: 256

Re: My Novamill won't run

Tony, The logic supply will be the 5V supply to the control card, +12V and -12V may be required by the RS232 comms circuitry. The main control card with the 7 segment display looks like that in the Triac but the output board it plugs into is different and has drivers for some of the output devices, ...
by DavidB
Sun 30 Jun , 2019 20:02 pm
Forum: Novamill
Topic: My Novamill won't run
Replies: 35
Views: 256

Re: My Novamill won't run

I'm thinking that those connectors you're seeing 21V at may be connected to the relays and maybe some other items as IIRC like in my Triac one side of the relays is at 24V and is powered when the open collector drivers on the control card are energised to pull the other side of the relays to ground....
by DavidB
Thu 28 Mar , 2019 21:38 pm
Forum: Router 2600
Topic: Cutter Clogging Issues Machining Aluminium
Replies: 2
Views: 102

Re: Cutter Clogging Issues Machining Aluminium

What alloy are you machining and have you successfully machined it before. I ask because I machine parts from 6061 T6 from time to time and normally don't use any lubricant and it machines fine but a few years ago I got some from a local supplier that was very soft and gummy and even with lubricant ...
by DavidB
Fri 08 Mar , 2019 21:40 pm
Forum: Cyclone
Topic: new jaws
Replies: 4
Views: 228

Re: new jaws

The data for the Cyclone here http://www.denfordata.com/bb/viewtopic.php?f=33&t=3823 says the spindle is A2 3" and some data here about the dimensions http://www.lathes.co.uk/spindlenose/spindlenoses.pdf . From memory the taper is 1 in 4 on diameter but worth a bit of simple trigonometry to check ag...
by DavidB
Mon 04 Feb , 2019 15:19 pm
Forum: Triac
Topic: electrical power control box to machine
Replies: 21
Views: 584

Re: electrical power control box to machine

The data sheet is fairly lacking in detail about the outputs, page 5 gave me hope that the output levels could be changed to 12V but all else indicated to me step/dir at 0 and 5V. The levels would need to be confirmed with the supplier or the output chips identified. The included picture shows marki...
by DavidB
Sun 03 Feb , 2019 23:49 pm
Forum: Triac
Topic: electrical power control box to machine
Replies: 21
Views: 584

Re: electrical power control box to machine

Martin, FTDI has this to say about DOS https://www.ftdichip.com/Support/Knowledgebase/aretheremsdosdriversavailable.htm so you may be able to run the software in a DOS box. 32bit or higher Windows will tell you if the software is trying to make unauthorised hardware access as it traps and prevents i...
by DavidB
Wed 30 Jan , 2019 0:53 am
Forum: Triac
Topic: electrical power control box to machine
Replies: 21
Views: 584

Re: electrical power control box to machine

I've just plugged a FTDI based USB RS232 adapter into my sole Windows machine and plugged the tutor keyboard into it and connected to that COM port with Hyperterm and it registered consistent characters when various keys were pressed which I would say indicated operation with a USB RS232 adapter is ...
by DavidB
Tue 29 Jan , 2019 20:25 pm
Forum: Triac
Topic: electrical power control box to machine
Replies: 21
Views: 584

Re: electrical power control box to machine

Martin, You should be able to test the drives using a wire connected into the appropriate 96 way DIN connector connection. The step and direction signals are internally pulled up to 12V within the Parker cards and so touching the wire to the signal ground would simulate a step signal, connecting the...
by DavidB
Fri 25 Jan , 2019 20:39 pm
Forum: Triac
Topic: electrical power control box to machine
Replies: 21
Views: 584

Re: electrical power control box to machine

Martin, I looked at the thread and think they may have been lucky it worked with that stepper driver board but it is a totally different thing to the Triac with the Parker SD cards potentially. Obviously the Denford card can drive the Parker cards directly but has suitable output devices which as fa...
by DavidB
Thu 24 Jan , 2019 23:06 pm
Forum: Triac
Topic: electrical power control box to machine
Replies: 21
Views: 584

Re: electrical power control box to machine

Martin, What BoB are you using? I'm not absolutely sure but having had a look at the SD card details the step and direction inputs are internally pulled up to 12V via a 4.7K resistor and that could damage some output devices with excess voltage. I think that may be why the use of discrete open colle...
by DavidB
Mon 21 Jan , 2019 20:43 pm
Forum: Triac
Topic: electrical power control box to machine
Replies: 21
Views: 584

Re: electrical power control box to machine

I'm looking to do this on a Triac as well and use much of the original controls with a BOB and Linux but it's one of a few other round TUITs. You may need to look at the Parker stepper driver details as IIRC the step and direction signals need to be pulled to ground to activate, the manual is/was re...
by DavidB
Sun 07 Oct , 2018 20:30 pm
Forum: MicroRouter Vertical / MaxiRouter
Topic: X HOMING PROBLEM ON VERTICAL ROUTER
Replies: 3
Views: 455

Re: X HOMING PROBLEM ON VERTICAL ROUTER

That sounds like the old classic problem with solder coated contacts where oxidisation would creep along the contacts and eventually result in signal issues especially in low current circuits. Standard practice is just to unplug and plug the chips/connectors in again and that action wipes the contac...
by DavidB
Thu 13 Sep , 2018 22:36 pm
Forum: Mirac
Topic: Latest new guy
Replies: 6
Views: 317

Re: Latest new guy

I collected a Denford Orac and we did that as a 4 man lift, one on each corner, and it is listed at 140kg (310lbs) and while it wasn't heavy for any one person if anything had gone wrong such as slipping, mis-stepping or losing grip as the underside was oily it could have ended in tears. At the heav...
by DavidB
Mon 18 Jun , 2018 20:40 pm
Forum: Micromill / Microturn
Topic: Denford Micromill 2000 no power - more than two fuses?
Replies: 10
Views: 490

Re: Denford Micromill 2000 no power - more than two fuses?

I was looking at the corrosion and was concerned it may effect signals in that area which may include the comms. Likely the battery leaking but they can be replaced. I think the usual process in this case would be to remove all removable connectors in the area and the battery and carefully swab the ...
by DavidB
Tue 27 Feb , 2018 21:45 pm
Forum: Triac
Topic: Removing Triac Z axis ball screw.
Replies: 3
Views: 316

Re: Removing Triac Z axis ball screw.

Sounds like a problem which affects many machines such as Bridgeport Mills and similar. I had it recently where when I wound the BP knee upwards it would start to jam and on inspection the classic top of the gibb breaking had happened in the past and it had been repaired. In my case a small cap scre...
by DavidB
Fri 19 Jan , 2018 20:15 pm
Forum: MicroRouter Compact
Topic: Error: Move Buffer Full
Replies: 5
Views: 705

Re: Error: Move Buffer Full

I don't know if this could be your problem but a software company I used to work for had issues with IIRC FTDI USB to serial converters in that the driver had a latency setting and it defaulted to a value which caused issues when communicating at 115k baud. The driver buffered the data and sent it a...
by DavidB
Wed 27 Sep , 2017 22:14 pm
Forum: StarMill
Topic: Starmill Specs
Replies: 5
Views: 1134

Re: Starmill Specs

Regarding the travel have you looked in the Starmill section at the brochure as that gives travel and some details of spindle taper options depending on whether an ATC is fitted or not, looks like your may have an R8 to Coventry Toolholder quick change adaptor fitted.
by DavidB
Wed 27 Sep , 2017 22:08 pm
Forum: StarMill
Topic: Starmill Specs
Replies: 5
Views: 1134

Re: Starmill Specs

I've no idea about the travel but the spindle looks like the Coventry Toolholder quick change unit I have on my Triac.
by DavidB
Wed 20 Sep , 2017 12:06 pm
Forum: Triac
Topic: triac atc
Replies: 24
Views: 1875

Re: triac atc

Moray, The RCD fed the entire house and the inverter TIG was the only load to cause it to trip, neither lathe (2hp and 3hp) or mill (1.5hp) caused an issue and it wasn't even when welding that the RCD tripped it was when turning the welder on so something about that load the RCD didn't like. The ele...