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Member postings for blowlamp

Here is a list of all the postings blowlamp has made in our forums. Click on a thread name to jump to the thread.

Thread: DRO errors, or are they??
25/10/2020 10:21:57

If you ignore the DRO and only use the cross slide dial, do you then get repeatable diameters that match the cut you have applied?


Thread: Why is this guys mini lathe parting off so well?
22/10/2020 12:59:03

The trick to parting-off is to get the chips out of the groove so they don't pile up and cause a jam. Use whatever means available to do that and parting becomes less of a scare. I think the 'be brave with the infeed' advice works because it usually results in long swarf being created that naturally clears from the slot.


Thread: Mini metro turns 40
21/10/2020 10:26:34

I'm not driving a Mini Metro.

Thread: ECAM v4 Lathe & Mill
20/10/2020 18:19:14

Hi Ian.

We don't want anything intimidating in the videos, so please let me know which parts are unclear and I'll try to make things better in future videos.

Ecam does do 2D+2.5D and is good for much of the work I encounter, whereas our moderator JasonB seems to use 3D CAM quite often. However, I'm sure you'd find Ecam useful to learn if you get into CNC at some point.


Thread: Alternative to PC based Cnc controllers
20/10/2020 13:01:45
Posted by Phill Spowart on 20/10/2020 11:57:23:

Forgot to say-I'm running a Mk3/4 board. Other than the CSS/FPR issue, I'm really pleased with it.

You'll certainly have an issue if you haven't got the spindle synchronisation working properly.

20/10/2020 11:52:39

There is this, but I don't know if it works with TNG2. This SD adapter card was used to allow the CNC machine to run gcode with minimal computer equipment, I think.


Thread: Reverse Engineering [using FreeCAD]
20/10/2020 11:33:46

As a quick starting point, I'd measure the width and height of the part with my calipers and use those dimensions to make an accurate bounding box in my CAD system. That would help give access to hole centres and provide reference lines to work from.


Thread: Alternative to PC based Cnc controllers
20/10/2020 11:14:02
Posted by Phill Spowart on 20/10/2020 10:35:24:

If it is of any use to anyone, I've rebuilt a boxford TCL with PlanetCNC stuff. It's not bad for the price. The cost of all the electronics, including two steppers and two power supplies, was £655. You still need to plug it into a PC through the USB port to set up, but I think you can get it running off a flash drive of some kind. Support is excellent. Only drawbacks so far are that it doesn't support constant surface speed or feed per rev for turning, which is a shame. I'm also struggling to get the spindle speed feedback loop to work.



I'm fairly confident that feed per rev works (I use feed per min) and I am certain the spindle feedback loop works as I have a rock solid tachometer reading as well as being able to screwcut with G76 and G33.

My PlanetCNC controller isn't set up to vary spindle speed so I don't know if G96 is operational, althought the Gcode manual indicates that it is. Other (currently) non-functioning gcodes have TODO after their description.

Are you setup with an up to date version of PlanetCNC TNG2 software/firmware?





Edited By blowlamp on 20/10/2020 11:17:42

Edited By blowlamp on 20/10/2020 11:25:16

Thread: ECAM v4 Lathe & Mill
19/10/2020 15:38:36

Facing stock with Ecam.


19/10/2020 12:20:08

I'll do you a video soon to help you along.


Thread: Drop on recoil escapement
16/10/2020 19:53:30

Just for interest, I recorded a video of a recoil escapement generated in Gearotic with various drop angles.


Thread: In flight social distancing
16/10/2020 17:37:37
Posted by Michael Gilligan on 16/10/2020 16:41:57:

Just found this ... New Improved, etc. **LINK**

This one claims 99.99% instead of the more usual 99.97% but I still don’t really understand what the number means

dont know ... by weight, by volume, by number ... ?

Covid 19 virus is very small, so this point of clarification is important.


It seems to me to say that their filter captures particulates that might be carrying pathogens/viruses.

The girl in their picture appears to have a few 'larger than virus size' gaps around her mask though. surprise


16/10/2020 10:08:58

Just a bit of info from the UK Government website.

Stay safe, be kind. hug 2hug

cv19 report.jpg

Thread: guideway surfaces regrind
13/10/2020 22:08:07

Have you considered lapping the surfaces?

Mill some copper/aluminium to 90 degrees, charge it with abrasive paste and give it a go is what I'd try first.


Thread: Alibre Pro / Expert and AlibreCam
12/10/2020 12:29:03

Which level of Alibre CAM are considering, as there is a large difference in price & features between the options?


Thread: DHL Rip Off
11/10/2020 20:08:10

Rip offs are everywhere.

Thread: Home Automation Technique
10/10/2020 15:03:29

..."Measuring temperature is important for calculating the relative humdity. However, theoretically I need the absolute humdity level to decide whether to start pumping air. And the temperature inside and out will be approx the same and only varies from 25 degC on a cool night to 35 degC on a hot day. So basic humidity is all I need."...

If you need a humidity sensor device, then I can confirm that is what I am using in the form of a Sonoff TH10 (plus the sensor).

The eWeLink app allows me to select temperature or humidity. I have it set to switch on my bathroom fan when humidity reaches 75%. and off when below this figure.

It's been working quite reliably for over a year now and still functions without a network connection once it has been programmed.


09/10/2020 14:34:34

I use one of these to control an extractor fan in my bathroom.


Thread: How to identify climb milling?
02/10/2020 17:26:44

Also be aware that milling a pocket reverses the climb/conventional direction of travel when compared to milling the outside of a pocket.


Thread: Quality Problems With the Sieg sx2.7
01/10/2020 19:33:26
Posted by Ketan Swali on 01/10/2020 18:06:45:
Posted by blowlamp on 01/10/2020 17:00:13:

I don't understand the logic of this argument. thinking

How did Colchester, Harrison and all the other machine tool manufacturers manage to export their machines abroad without them losing precision question


Hi Martin,

There is no logic to argue, but I really don't expect a person with your level of compitance to understand. wink

Ketan at ARC.

Edited By Ketan Swali on 01/10/2020 18:10:49

Edited By Ketan Swali on 01/10/2020 18:11:12

Hi Ketan.

Is this meant as a joke or an insult?


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