MFT Bench Dog Set (19.98mm) - 10mm, 20mm, 30mm, 40mm, 50mm and Rail Mount (45mm) by Enly1

Enly1

Tools>Other Tools

Print Profile(1)

All

P1S

P1P

X1 Carbon

X1E

0.28mm layer, 3 walls, 20% infill

Designer

1.2 h

1 plate

4.6(5)

Boost

Released

Description

Since I have access to a CNC at our local fablab (http://fablab.warrington.ac.uk/), I'm making my own MFT top for the garage.

Not knowing how much I'm going to gel with it, I'm not investing in lots of steel benchdogs at the moment, so I have created some of my own for now.

Benchdog Sizing

The Benchdogs are modelled with 18mm long bottom shafts, (1.5mm Deep, 1.5mm wide middle ring) and various height upper shafts, rounded with upper and lower chamfers. Bottom faces have a negative dimple to make identifying the bottom easier on smaller dogs.

A dog that can be used to mount a fence is also provided and can be used with a screw or suitable sized bolt to attach to a wooden or aluminium fence.

Specific heights provided are 10mm, 20mm, 30mm, 40mm, 50mm and the fence mount is approx 45mm above the table when installed.

MFT Variation

These benchdogs are modelled with 19.98 diameter shafts. I've bought real dogs to check the fit of my MFT holes and realised that there are wide variation in the MFT world.

Benchdogs.co.uk aim for 19.96/98. UJK Dogs I just bought I measured at 19.93/94 and are too loose in my test holes. So combined with Printing Gotchas … you'll have to do some scaling to suit your needs. Also note, layer lines increase friction, which you may want to use to your advantage.

Printing Gotchas

These have been modelled with no tolerances included. Trying to get accurate parts for everyone is impossible as printer tolerances vary, filament shrinkage depends on material and brand and must be allowed for. For best results, print, measure, calculate scaling ratio and adjust either overall scale or XY Compensation settings etc to suit your desired dimensions. please don't complain that they are too loose or too tight.

benchdog

mft

Comment & Rating (7)

@thekrill

Print Profile

0.28mm layer, 3 walls, 20% infill

I found it hard to adhere to the surface, even when using glue and tweaking parameters like bed temperature Once printed they work as intended.

The designer has replied

@simon.love

Just a heads up, these were designed for chamfered holes, so they sit flush in the recess. The hole in your picture didn't have a chamfer, so these will sit above the surface if the other holes are the same. That will throw out the accuracy. As for the main reply: What print surface were you using ? I used the gold textured PEI plate and never had any failures or the slightest sign of issues and I've printed lots of them. No glue or fiddling, just standard default profiles for PLA and PETG. Saying that, my PETG is usually a little on the hard side to get off the bed, so maybe that is the reason. Glad you got them printed though !!! Enjoy

@IvorBadic

Print Profile

0.28mm layer, 3 walls, 20% infill

Tried printing on side with supports (for better later direction). Struggled and had layer issues. returned it to vertical and printed perfectly.

The designer has replied

@simon.love

Yeah, its a compromise - I designed them for printing in the orientation to deal with the overhangs and ensure accuracy in their dimensions for fitment in the dog holes, so do have to sacrifice some layer adhesion weakness, but never caused an issue in practice.